CA2223314C - Electric power system protection and control system and distributed control system - Google Patents

Abstract

An electric power system protection and control system, including, a plurality of protection controllers, each for executing protection and control of an electric power system by inputting a status quantity of the electric power system and for converting the status quantity into digital data, and a display controller connected to each of the protection controllers via a communication network, for displaying and controlling an operation and status of each of the protection controllers for monitoring. The display controller is provided with a program module sending unit for sending out a program module corresponding to contents for display control in the display controller to one of the protection controllers via the communication network, respectively. Each of the protection controllers is provided with, a program module receiving unit for receiving the program module from the display controller or another one of the protection controllers via the communication network, an execution unit for executing the received program module, and a transfer unit for transferring an execution result by the execution unit or the program module stored in the protection controller to the display controller or another one of the protection controllers via the communication network,

Description

~ CA 02223314 1997-12-02 TITT.F. pF THF. TN~rF.~TIO~

ELECTRIC POWER SYSTEM PROT~CTION AND CONTROL SYSTEM AND
DISTRI~UTED CONTROL S~STEM

R~cKGRouNn OF THF, INVF.NTT~N

Fiel~ of the In~ention The present invention relates to an electric power system protection and control syste~ i~ combinatlon of digital protect~on controllers, SUch a~ digital relays, to protect and control an electric power sys~em by inputting stat~s quantities of the electric power system and converting them into d~gital data and a display controller to display and control the monitorinq of oPeration and status of the d~ git~J E~rot~ction controllers via a com~unication network, and a distributed control system.

De~rript~on ~f the R~1~te~ Art Diyi~l protection controllers, such as digital relays, are already used widely in the field of the electric power system, and are made hig~ly function~l by use of highly efficient microproces~ors and memorie~ of large capacity, etc.
in rece~t years. In particular, ~or the labor savin~ of their operation and ~aintenance, it beco~es pos~ible to realize a remote opera~lon and monitorlng sy3tem for operating and monitoring the operation and status of digital protection controllers ~ia a wide area transmission network f~om a long distance.
In these SYstems, it i~ Possible to display ~ ri ca.
quantities (current and voltage quantitles co~erted into digital data) input from an electrlc po~er ~ystem at a di~tant place via a t2:ansmi~3sion sy~:tem in addition to the deta~led informa~on relative to the ope~atio~ and status of digital protection controller~. Definite examples of these ~yste~ are disclosed ln llteratures, ror lnstance, (The 199~ National Meeting of The Institute of Electrical ~ngineers of Japan, Lectured Theses 1529 "Development of Digital Relay Remote Operation Monitoring System").
On a system for the purpose of the remote oPeratio~ of conventional digital protection con~rollers, such as digital relays, it takes ~uch a for~ that along the remote operation menu of diyital protection controllers ~h~reinafter re~erred to as "Protection Controllers"), a request i~ submitted from a remote personal computer via a wide area transmission network.

Whe~ thi~ reque~t is received, the protecti~ ~sLLroller performs the process according to the request and returns a response to the personal computer that sent the ~equest. An example o~ the remote operation menu is sho~n in FIGURE 40.

A case in taken to change the setting, f or exa~ple, the RECEIVE~, IMENC~ 7. . :S~PM PRINT T!MENOV. 27. 9:00PM

setting of a threshold value of the relay operation in a dlgltal relay, according to a setting menu as an example. As shown in FIGURE 41, the steps will ~e as shown below: First, electing a display control me~u after selecting a substation and equipment and connecting ~he communication according to a communication menu within a remote operAt.ion mPnu; and then, after further selecting the ~etting, ~e~ting elements to be changed are selected, numerical values to be changed sre input and a writing requeet i6 6ubmit~ed to E:~PRO~Is in th~ E~rotectlon controller, and thereafter, an operation ~ta~ting request i~

-cubmltted .
In this case, untll a series of processings is cornpleted, it is necessary to maintain the connection between the personal co~puter and the protection controllers. Accordingly, there ~111 be a first problem that delay of communication accompanied with increase in the traffic on a com~nunication net.work and drop of reliability generated f~om loss of communication packets.

FIGURE ~1 shows th~ change of one ~cttin~ element. ~ut ~o as to change plural setting elements, a required time furthe~
increases. Further, to ha~e a perso~al computer generate varioua requests correspo~diny t~ ~he above-described remote operation menu, it is required for the operator to operate the per~onal computer to each request.
T~is means that when functions of a protection ~ontroller become complicated and versatiled, the nu~ber of operation~

EIVED T IMENOV. ~7 , :~rM PRINT Tl~,lENOi. ~~7. 9:00PM

increase and workload of the operator increa~e~. Fu~ther, when plur~l protec~lon controller~ are ~equired to execute ~he ~ame operation, lt beco~es complicated as the same work is perfo~med for different controller~, and there will be caused such a second proble~ that with the increase of workload, the drop of reliability due to ~uman errox will be genar~ted.
Further, in case o~ ~uch a remote operation ~ystem, plural protection controllers are operated by a single per~onal mp~1ter~ In this cas~, lt will become nece~ry to configu~e the system by taking differences in the subs~ances of protectlon controllers (for instance, setting elements due to di f f erent ~rt~e~; ~ion relaylng scheme~ into consideration.
The con~iguration in th~s case is shown in FIGURE 42. As shown in this FIGURE 42, the configuration at the personal co~puter slde is corresponding to the ~inds of protection controllers. ThiS means that with the increa9e in kinds of protection controller~, the volume of the corresponding software t~at is to be provided on a per~onal computer increa~ , and there will be such a thLrd pro~lcm that the necessity for modification ls produced and the economy and reliability of the system will become worse.
Further~ in auch ~ rertlote operati~Ll r~y~l~em, as a local network and a wide area transmis~ion network are used, the protection controllexs ca~ be easily operated remotely at a place w~ere they can be connected to the8e communica~ion network~. In other word~, the remote operation can be ~ade RECEIVED TIMEN5V ~ M RRINT TI~ENOV.27. o:OOPM

similarly through pe~sonal computers installed at plural locatlons.
Th~s state is shown in FIGURE 43. In this case, lt is necessary to provide a remote operation software that is corresponding to each protection controller to each personal computer as described above, and there will hP ~ f~urth proble~
that this system is inferior in the aspect of economy such as required expenses and ~aintenance.
~ urthar, as it becomee poE~ibl~ to ~onitor the oper~tion of plural pro~ectlon controllers by a single personal computer in the remote operation system as described above, it is le ~o compare ~elated same ltems ~for ins~ance, electrical quantitie3 of the system taken by plural protection controller~ connected to the same ~ystem).
In thls case, a personal computer is connected to protect~on controllers subject for communication and displa~s operating items along the remote operation menu shown in FIGURE
40. If it is desired to check the state of the sa~e item~ on other relatod controllers, a personal computer is connec:ted ~imilarly to the related controllers for communication and di~plays the items along the operation menu shown in FIGURE 40.

In thi~ case, if the number of pr~te~ LI controller~
sU~; ect for control is increased, such operation~ as ~election of controllers, connection for com~unication and selection of item.~ become necessary for each protection controller and the operations becomes very compl~cated, and related other RECEIVED TIMENC~ 7 7:53PM PRINT TIIllENOV 27. 9:0QPM

protec~io~ controllers and items are di~played independently f~r ~i~Ch proteCllOn con~roller. However, as they are not displayed as related protection controllers and ite~ in the same picture, there will be ~uch a flfth problem that the comparison of related items will become an o~e~load for operator.

In this case, it is considered to con~olidate the menu for every sa~e related item~ over plural controllers. But if it is required to see different item3 for e~Lch controll~r, i~ wiil be complicated conversely, and in addition, the mi~ntainability will become a problem when there is an increase/~odification of tll~ con~roller. Further, there will be such a sixth pro~lem that if the ~ame protection controller is acces~ed simultaneously by plural display cont~ollers, the processing load of the protection controller increa~es in order to respond to the access and therefore, a response ls delayed Further, for such a remote operation sys~em there is the possibility for demand to realize versatile functions. For 1n.ctance, con~entionally the protection, control ~nd ~easurement of an electric power system are ~eparated as separate controller. It is considered to consolidate these function~ in the same controlleL. In thls case, there will be a ~eventh problem that the processes to be Lncorporated in a protection controller increase and an excessive load is generated in the aspect of the economical efficiency, reliability and maintainab~lity.

RECEIVED Tl.l.~E~lO'i. 27 , :53P~il PRIIIT Tl!flE~'lOi 2,. 9:00P~l Further, when changing the speci~ication of a protection controller, 1~ is a general practice to stop the controller and change a ROM containing a program, and there will be an ei~h~h proble~ that the drop of availa~ility of t~e system and complicated chan~ed workload.

Digital protect~on controllers are already used widely in the field o~ the electric power sy~t~m, and are made highly.
fun~tional by u8e of highly cff~ cient microproces~30r~ ~n~
~mories of large capacity, etc. in recent years.
Definitely, there are a digital relay to judge system faul~, a fault locator, a ~ailure extension protection equipment, etc. The digital protection controllers described above are widely used in the operation of electric power systems at present.
Hereinaf~er, taking a digital relaY as an example, a conventional technique will be described. FIGURE 49 ~how~ ehe construction of a basic digital relay. The digital relay is co~po~ed of an analog-to-digi~al COnverBiOn ~nit 10 1, ~
digital processor 10-2, an inpu~/output interface 1~-3 with such external equipment as a breaker, e~c. and a bus 10-5.
Fur~her the~e units 10-1 throu~h 10-3 are connected each other via bus 10-5.
Analog-to-digital conversion unit 10-1 ls composed of a~alo~ rilters 1-11 to l-ln, sampling hold circuitg 1-21 to 1-2n, a multiplexer 1-3 and an analog-to-digital converte~ 1-4.

RECEI~iED TlMENOi, . 7 :53,~',1 P~INT TI~IENOV. 27. 3:00PM

It takes status quantitie~ ~f an electric power system that ls an obj~L of ~ro~ectlon and control as n-pieces analog information A-1 to A-n and con~erts them into digital quantities after having held at a specified sampling interval.
On the othe~ hand, digital processor 10-2 i~ co~posed of a CPU 2-1, a RAM 2-2, a ROM 2-3 and a non-vol atile me~nory EEPROM

2-4. The data of electrical quant~ties converted ~o digital data described a~ove are transferred to RAM 2-2 successively, and ~o~ding to this data, 6etting valuea of the pL~L~c~ive relay stored in EEPROM 2-4 and programs from ROM 2-3, CPU 2-1 performs various protection and control operations sueh as c~lculatlo~ rel~yilly yrogram.
Next, input/output interface 10-3 i~ an interface to perform by taking the state of external control equipment such as information on a circuit breaker, to output the operation of the protective relay, reset output, triP command, etc. to external equipment. A definite example of the con3truction of the digital ~elay is as described above.

In case of l~.hr~ .srital relay, its princip31 duty i9 to protect an electric power system. The result of the proper protection by the digital relay is stored in ~AM 2-2 as data (the opcrating state of the relay, el~Lrical quantl~y, olher related information) at ~he time w~en a trip command is output to a circuit breaker fro~ input/output interface 10-3, and generally con~irme~ by operator by reading these data.
On the other hand, for labor saving in the operation and RECEIlE~ . 'MENOV. /7. 7:5~.-'., PBINT TlMEiiO'i. 27. 8:59PM

main~enance of digital protection controllers such as digital ~el~y~, it beo~nles possible to realize a remote operatio~
monitoring tystem to monitor ~he operation and status of digital protection controllers remotely via a wide area transmission network in recent years. In this system, digital electri~al qUantities (current, voltage con~ert~d to di~ltal data) input through an electric power system can be displayed at a remote location via a ~ran~tm~ ssion system in additlon to detailed in~orm~tion on the op~ration and state of digital protection controllers.
A definite example of this system is di~tclosed in liter~ture~, for instance, ~T~e 1996 Na~lona' Meeting of The Institute of Electrical Engineers of Japan, Lectured Theses 1529 "Development of Digital Relay Remote Operation Monitoring system~ xamples of menu items that are usable in the remote operation monitoring s~stem are shown in FIGURE 40.
As shown in this FIGURE 40, itemS required for the operation monito~ing of the digital relay are all usable at a remote location. When thi~: r~mote operation morLitori~g sy~tem iS applied, it become~ now possible to display and check the result of the operation of ~uch protection controller~ as the digital relay on ~ di3play co~troller, such a~ ~ personal computer, in a remote attendance substat~on.
It the present di~ital relay and remote operation monitorlng sys~em to monito~ the operation of the d~gital relay, if a system fault occurs as described abo~e, the contents of RE5El'iED TIMENOV 27. 7:5~PM PRINT TI~ O'i. 27. 8:5~PM

operation accumulated in the operated digital relay (operated relay ~le~ent, electrical quan~lty and other related ~nformat~on~ are re~d out and checked at a remote locatio~.
So far, if a system fault occ~rs and one o~ digital relays installed at various locations is ~perated, in order to check if the relay operated properly, an ope~tor ~oes to the location where ~hat digital relay is installed and checks the contents of the operation. In partic~lar, ~hen it i~ e~timated th~t the relay has not operatcd properly, it i5 nec~ ry to check the contents of the operation of corresponding digital relay (including a controller not in operation) more in detail and much ~ L i~ needed.
~ it becomes no longer required to go to a substation where a digital relay is in~talled $f ~he remote operation monitoring system descr~bed is applied, labor required for the check$ng work when the controller is operated decreases.
However, there are such problems as described below.
First, the present remote opera~ion monitoring ~yste~ ha~
item menus f~r e~rery controller as shown in FIGU~ 40. When operato~ chec~s the content~ of ~he operation of a controller as shown above, out of the menu of operations, for instance, on the "Relay Operntion" screen, the r-~lay operatlon when the controlle~ i~ operating is chec~ed to judge whether the proper relay element operated or an unnecessary relay element operated.
on ~he "Elec~r~cal Quantity" screen, in what size and p~a~e the system electrical quantity was ~hen the controller ~Perated, RECEIJED ,I'ilENOJ.~ 1 7 Sr~ ,M P~ IT TIME~lOv 27. 8:59PM

and the validity with the operating and non-operating state of rclay element iS judge~ Furt~er, on the "~elated Information"
screen, the input state of the controller when it ~as operatin~
~for instance, a circult breaker) and the ~tate of the transmission system is checked and correlated with the relay operation.
Thus, the state of an objective controller i~ checked through ~any step~. In this case, data requested from a Personal computer and re~p~,nse data from a digital rclay go back and ~orth alternately as shown in FIG~RE 45, and the communicati~n route between the personal computer and the digit.~l ~elay mu3t be kept maintained ror a long hour until a series of procecses are completed. As a res~lt, there is such a first problem that ~eliability may drop due to increase in e trarrlc on the co~municatlon networ~ and delay of communication and los~ of comm~nication packets resultin~
theref~om.
Further, in such the analyzing work when the controller is operated as descrlbed above, it is al.s~ re~uired to collect the contents of operations of plural digital relays related to the syste~ fault and compa~e them. By the co~pari~on, normality o~
abnormality of thG controller opcration c~n be ~nown. For instance, if a system fault occurred in one of two parallel transmis~ion lines, it beco~es possible ~o judge whethe~ the co~troller~ we~e operated normally or not operated by checking and comparing the operational contents of at lea~t 4 EECEIVED TIME~O~ 2, ~:2~,',1 P~.INT TIME~10~. 27. 8:S9PM

controllers protecting both ends and respect~e lines of two ~ransmisslon llne~
Howe~er, in case of the re~ote operation monitoring system described above, as the connection of communication with an ob~ective controller and the selection of the ~creens corresponding to menu items are needed for each controller an~
their operation becomes very complicated. Furthermore, although the display screen of related other controllers and 1te~s are di~played lndepend~ntly for e~ch controllcr, they are not displayed as related controllers and items in the same screen, there is a second proble~ that operator is exce8sively burdene~ when the o~erdtor ~u~ a res related ltems.
In this case, it may be considered that the menus for plural controllers may be consolidated by the related same item.
However, when it Ls desired to see different items for each controller, it become~ complicated inversely, and further, the maintalnability wLll beco~e a problem when controllers are inc~eased or modified. The more system faults are taken place~
in a wl~e rAn~e ~n~ are com~lica~e~, the more t~ese probl~ms come out remarkably.
Further, the system fault types are generally always different. For inst~nc~, c~ntrollers that aL-e operated cha~
whenever a fault occurs, depending on component elements composing an electric power system, sUch as tran~ml6sion line, bus, ~ransformer, etc. and fault occurring place. In other words, operator must judge whlch digital relay should be RECEl'iED T!MENG'~. 21. ~ I PRINT TIMENOV. ~7 ~:59PM

checked for the contents of operation, whenever a system fault occurs, according to i~s fault aspect and perform the re~ui~ed work accordingly. Thus, there is a third problem that this will make the work co~plicated, and further, controllers that mu~t be checked may be mis6ed or conversely, controllers that are not required ~or the checking are checked.
Furthe~, there i~ a fourth problem as follows. In order to check the validity of the operation or non-operation of controll~rs wh~n a ~ystem fault occurs, it is nece3~ry for operato~ to know a general aspect of the fault ~for instance, a ~ingle line earth fault, two llne ~hort-circuit ~ault, etc.) from v~ ye ~nd current waveforms at the time of system rault obtained from an electric power system o~er~ation unit ~uch as an oscillograph equipment, etc. installed independently from the digital relay. It is further neces~ary for operator to make the overall analysis and judgment from the general a~pect of the fault, the contents of operation of the digital relays and the state of the ~ystem. Thus, much labor of operation is ne~d and oper~tor may ~ake a ~iss ~udgm~nt dependi~g on hi~
ability.

A3 ~ ch~r~cteri~tic of ~ di~ital relay, tl~L~ i5 an automatic supervising function. The au~o~atic super~ising function is a moni~orLng function incorporated in the relay unlt so that the sy~tem protectlon fùnction, that i~ an oblig~tion of a dlgital relay will work normally. Detailed B~rEl;E~ Tl~,IE~J; ~ 5,~PM PBINT TIMENOV. ~1. 8:59PM

contents are de-~crlbed, for instance, in the "PracticaL Reader fvr Diyl~al Relay", p. 70 t~rough 7~, etc. edi~ed and written by Izu~i MITA~I, published by Ohm Corporatlon.
In this respect, the automatic supervising described in this literature is roughly divided into the cont~nuous monitoring and automa~ic checking. In the continuous monitoring, the monitoring function works at the periodical fixed cycle. The automatic checking is to confirm its ~peration ~y starting the output circu~ t proc~s~, ctc . that does not regularly work, at predetermined intervals (fo~
example, once a week), as well to detect the failure to operate mode.
~ y such an automatic super~ising ~unction, a failure of digital relays has been quickly detected. As a re~ult, a probability to produce a non-correct operation like a failure to operate at occurrence of an electric power system fault or a~ unwanted operation a~ a fault of out of the zone is lowered.
From the above-~entioned background, accompanied by the ~iff~l5i~n of di~ital relay~, the importanc~ of an automatic supervising f~nction has been increased.

On the other hand, for labor saving i~ the operation and mainterance of digit~l prOtection controllers 9uch a~ digital relay~, it become.Q possible to realize a remote operation monitoring system to ~onitor the operation and status of digital protec~ion controller~ remotely via a wide area tranQ~ission network in recent years. In thi~ ~ystem, digital ~ECEI~ED T!'MENOi. ~7 7:5~PM PRINT TlMENO~i. 27. &:59PM

electrical quantities ~current, voltage conve~ted to digltal data) input L~lrough an eleclric ~ower sy~tem can be displayed at a remote location via a transmission system in addition to detailed infor~at~on on the operation and ctate of digital p~otection controller~.
~ definite exa~ple of this svs~e.~ is dlsclo~ed in literatures, ~or instance, (The 1996 National Meeting o~ The In~titute of Electrical Engineers of Japan, Lec~ured Theses 1529 "D~rel.o~m~nt of Di~ital RQlay R~ote Oper-~tion Monitoring Sy~tem"). Example~ of menu items that are usable in the remote operation monitoring system a~e shown in F~GURE 40, A~ ~own in this FIGURE 40, iLe~.~ requlred ror the operation monitoring of the di~ital relay are all usable at a remote location. w~en this re~ote operatiOn ~onitoring sy~tem i~ applied, it becomes now possible to display and check the result of the auto~atic supervising carried out ln the diqital relay on a dlsplay controller, such as a personal computer, in a remote of~ice.
I n the present ~ig;~l relay and remote op~ration monitoring system to monitor the o~eration of the digital relay, the auto~atic supervising is carried out in indi~idual digital relayc: a~; described above, re~ul~ing in the ~tate th~t it:~i result can be remotely confirmed.
on the one hand, in the operation and maintenance of dlgltal ~ype protec~lon controllers including dlgital relays, the work called as a patrol has been carried out from ~ECEI'iED Tll~lENO'i.2,. ,:5~.-" ?F~INT Tl'lYlEI'lOi.2,. ~î 59PM

conventionally. This is a work to indi~idually confirm the status ~f diyital relays lnstalled in substations, etc. For instan~e, they are confirmed from the viewpo~nts of whether there i~ any relay element in the operating state, ~hether the auto~atic checking is conducted at precise cycle, whether there is other defective display, and whether there is any differcn~e in the states of a ad~ourning plurality of controllers, etc.
Besides, in case a failure occurrence or an omen of failure occurr~n~e ~s recognized, th~ action to reetorc (for ex~mple, replacing the hard~are, remodeling the software or changing the relay set value) is taken.
Thi:s h~ been carried ~ut ~ conflrm the result of the abo~re automatic super~rising func~ion. To ~upplenlent this, it has been carried out to disco~er t~e ~ode of the failure which can not be ~ound by t~e automatic supervising (for example, failure of automatic-~uperviqing function itself o~ Partial failure that can~ot be detected in the automatic super~lsing function).
Since such a work fc~r A E~trol like this is carried ou~; by the work that operators go to a remote un~ed subs ~ation, and by confirming the display state and operating state of each dig~tal relay ~udgc .~nd record, a large workload come~ t~ b~
required. In the above remote operation monitoring system, due to the fact that operators do not go remotely, but the display of dlgltal relays can be confirmed, lt ls possible to substitute a part of the work for a patrol by such system.

P~ECEI~iED Tl''~)lOi ~ P3,1 PRINT T13~ENO~. 27. 8:S9PM

However, there are problem~ as described belo~.
First of dll, there ls each item menu per each controller as shown in FIGURE 40 in t~e present remote operation monitoring system. In case that the work corresponding to the wor~ for a patrol as described above is carried out, for instance: the automatic checkinq executin~ number i~ ~nf i rmed in the "Automatic checking" picture, it is judged whether it i~
the correct number; it is judged whether the system electrlcal quantit.y ~ s fetched as a corr~ct value in thc "Input electric~l quantit~" screen: it is confir~ed whether each relay ele~ent-operates unnecessary in the "Relay Operation" screen; and it is confirmed wheth~r ~ ~ilure i~ not deteC~ed by ~he automatic supervising in the "Abnormal contents" screen.
The ~tate of the controll~r in object is confirmed by many procedures like thi~. In this case, it i~ necessary that the communication route between the personal computer and the digital relay is kept for a long time until a serie~ of processing will end as ~hown in FIGU~E 46. There is a first ~roblem that th~ in~r~a~e in the trafflc on th~ communica'cion network and the lowering in reliability by the delay in communication and the loss of communication packets resulti~g there~rom.
Furthermore, a plurality of controllers are compared in the work for a patrol as described above, there is an advantage that an abnormall~y or a controller ls aware relatively early.
For instance, in case of two digltal relays for protection of RECE l ~iED T ' 'MENO''i. 27. 7: 5 ~ PM P R I N~ ~ I MENO i. 27. 8: 59PM

transmission line to receive electrical quantities from the ~me transml~ n llne, the lnput electrlcal quantities fetched to the controllers are the same. The fact that these two quantities are dif~erent can be ~udged as a failure of the analog-digital convers~on unit ln FIGURE 44 or an omen that it reaches to the failure.
Further, the automatic checking executing numbers are the 8ame in 2 controller~ whose automatic checking cycles are the sam~ ~nd which begin thQir operatio~ at the sa~e time. The fact that the~e numbers are different can be judged that there is any abnor~ality in the processing related to the a~tomatic chec~ing . There are m~ny ~v~ntages to perrorm ~he comparison of states of a plurality of controllers.
However, ~n case of the ~emote operation monitoring system described above, as the connection of communication with an objective controller and the selection of t~e items are needed for each controller and their operation becomes very complicated. ~urt~ermore, although t~e display screen of related other ~nt.rollers an~ itoms are di~played independcntly for each controller, they are not displayed as related controllers and items in the same screen, there is a second problem ~ha'c operator is exces~ively burdened whe~ Lhe operator compares related items.
lt this case, lt may be considered that the menus for plural controllers may be consolida~ed by the rela~ed ~a~e item..
However, ~hen it is desired to see di~eren~ items for each RECEIVED T!',lEl'lC~ 7. I:~r.~''l PRINT TI~IENOV 21. 8:58PM

controller, it becomes complicated inversely, and further, the maintainab lity will become a problem when controllers are increa~ed or m~ified.
Fu~ther in recent years, there is a trend that functions to store in digital type pro~ection controller are increa6ed, and thereby p~otection controllers beconl~ compllcated. An automatic supervising function including a diagnostic function for specifying a fault part increases accompanied by this.
Consequently, there is a third problem in economical efficienCy that the quantity of automa~ic supervising ~oftware in the protectlon controller co~es to be large, and ~emories required come to be large.
~ urther, in case a change in the ~onltorin~ function is produced by the change in the operation of a controller ~change in input quantity, addition of relay element, etc.), or in a ca~3e t~at a ~hange is prod~lccd ~y the function~l improv~am~
in the conventional system, it is required to change the contents of the ROM to store the program to realize a mo~ oring functlon and a dlagnos~ic r~nction. ~or this rea~on, there is a fourth proble~ that the controller is stopped and the availability thereof decrease~.
Further, there is a fifth problem that a great time is required, in the present si~uation, in the work that a f;~ r~
part is supposed and restored after the abnormal state of a controller i5 found by an operator ~hrough a patrol, and in the ~udgment th~ a time for a round o~ ne~t in~pectlon ia RECEIVED TIMENOV.'~7 ,:5~PM PBINT TIMENOV.27. ~ 5apM

determined from the hi~tory of the ~orking re3ult~ in the past, ~Lc.

In the conventional re~ote operation monitoring sy~tem to operate and monito~ from fa-r away a protection controller like a digital relay, .he protec~.~ on controller i~ operated by the menu shown in FIGURE 40. The setting work to perform by the "Setting" menu in thi~ menu i~ an important ~ork to dete~mine a sensitivity and a char~cteri.~tic o~ the ~rotectlon and control function, and it is necessary to set without errors all the settlng values of relay ele~ent~ w~ich a protection controller has.
In recent years, as the high functional~ty and ~ulti functionality of protection contro~ler~, the number of relay element~ to be stored in a protection controller is in a trend of increase. Acco~panied ~ith thls, the nl1mber of setting elements has been also increa~ed. Ho~ever, the change and/or co~firmation method o~ ~etting values have ~een a~ conventional, ~n~ this ~tate is shown in FIGURE 47. FIGURE 47 ~1L~W8 the data exchange bet~een the display controller and the digital ~elay ln case setting is per~o~ed fro~ the remote display controller by the r~mote ~perati~n ~wnitorlng system.
First, a display control menu is selected after selecting a substatlon and equipment according to a co~nication ~enu within a remote operation menu and the communication line i8 connected. Then, afte~ further selecting the ~ettinq, a RECEIvED TlMENOi.27. 7:58PM PRINT TIMENOV.27. 8:58PM

setting element to be changed is selected, a numerical value to be changed is input and a writing request is su~mitted to an EEPROM in a protecti~n ~ontroller, and thereaftcr, an oper~tion starting request is submitted.
The above is desc~ibed abou~ the cha~ge of one setting element. In C3-~:! of the c~Qnge of plural ~ ing elements, the above procedure is to be repeatedly made by the nu~ber of elements. ~urther, at this time, in case a state like abnormallty of hardware in the controller or an operation of a relay, etc. i~ produced, since perfor~ing the change in settinq is apt to lead to an unwanted operation of a cont~oller, it is generally suspended. In thls case, it is ne~essa~y to perfor~
the confir~ation by the other menu item in FIGURE 40, ~nd t~is also increa~es the ~orkload.
The above is also similar in the case in which the setting ~ork i5 p~rformcd by the pan~l fo~ aetting, ~tc. on the f~ont of the digital relay without using a network. Thereupon, the ~e~tinq work causes an increase in the workload and a human ~LL~L ~c~ompanled Wlth thls, and Ihere will be a ~irst problem to drop both economical efficiency and reliability.
Further, the setting for controllers in ~ubject i~
performed by many procedures like this. In case a remote operation sy~tem i8 used, as shown in ~IGURE 47, a request data from a personal computer and a response data from a digital relay mutually co~e and go. It is necessary to maintain a comml~ni~ti.~n ro~te between the personal computer and thc RECEIYED T MENOV. 27. ,:58PM PRINT TIMENO~. 27. 8:58PM

digital relay ~ntil a series of processing is completed.
Accordlngly, there will be a second problem that a drop of reliability is generated, because of increass in tr~ic on the communication network, and delay o~ communication and loss of communication packets, etc. accompanied ~ith it.
Further, in many cas~ the change in ~etting ~ccompanles the change in condition of the electric power system in sub~ect.
In this case, the similar change in setting values i~ to be performcd o~er plur41 prote~ion controlle~. But there will be a third problem that economical effic~ency and relia~ility is lowered by repeating the setting change procedure as de~crlbed above similarly against each controller.
Moreover, in case considering that setting ~alues are changed in response to the change in the electric power syste~
as described above, since the workload is much a~ de~cri~ed above there is a predeterminP~ .mit in tha following time.
T~e larger the range of the sub; ect system is, the larger this delay becomes. Accordingly, there will be a fourth problem that the protection ~d control of the el~ctric power system cannot sta~ly performed.

Y OF ~ T T~lN

Accordingly, one ob~ect of this invention is to provide ~n electrlc power system p~otectlon and control system compo~ed of a plurality of protection controllers and a ~.isplay controller BECEIVED TI~ENGV. 27. 1:58CM PRINT TIMENOV. 27. 8:5~"~M

connected ~ria a comI~unication net~ork whlch is excellent iI~ the ope:r~}~ility~ economical efficier~cy, ~Laintainability and reliability, without increasl~g the load of the communlcation network, by utilizing the fact tnat the protect~on controllers are connected to the communication network and paying attention to the movement of a program module ~n~ th~ coop~ration functions among protection controller~ in the system.
Another object of this invention is to provide an electric power Cy~ctem protection and control 3y3tem compo~d ~L ~
plurality of protectlon controllers and a display controller connected via a communication network which is excellent in the oper~ility, ec~ ical erficlency~ main~ainabllity and reliabillty, by eli~inatin~ the operation analyzing work ~hich is con~entionally performed and ~ithout increasing the load of the co~u~Lunication network, by utilizir~g the fact that the protection controller~ are connected to the CommUnication network and paying attention to the movement of an operation analyzing program module.
Stlll another t bje~t of ~his itlvantion iB to provide ~n electric power system protection and control system composed of a plurality of protection controllers and a display controller ~onnccted ~ia a coDNnunic~tion n~tw~k which 1~ excellent in the operability, economical efficiency, ~aintainability a~d reliability, by eliminat~ng the work for a patrol which is conventlonallY performed wlthout inc~easing the load of the communication network, by utilizing the fact that the RECEIVED ~IMENOV.27. ~P'il PRINT TIMENOV.27. a:58PM

protection controllers are connected to the communication network and paying attention to the movement of a monitoring prog~am module and the coopera~ion functi~ns among prot~cti~n controllers in t~e 6ystem.
Still a ~urther object of thi~ invention is to pro~ide an el~c.tri c power syst~?m protection and control syatem c~mp~sed of a plurality of protection controller~ and a display controller connected via a communlcation network which is excellent in the oper~bility, econom~ c~l erficiency, malntainabllity and reliabillty, by ellminating the setting work which is conventionally performed, extendi~g further the range o~ the ~etting function, optimizing the setting value and the protection and control c~aracteri~tics quickly and anonymou~ly corre~ponding to the change in the electric power sy6te~, without increasing the load o~ the communication network, by utilizing the fAc~t. th~t the protection controllere arc connected to the communication ne~ork and ~aying attention to the movement of a setting program module.

One object of this invention is to provide a distributed control system composed of a plurality of distributed con~rollers and a display controller connected via a communication network whlch i~ excellent in the operabillty, economical efficiency, maintainability and reliability.wit~out increasing the load of the communicatlon network, by utilizing the fact that the di~tributed controllers are connected to the RECEIVED TIMENGV.27. 7 58PM PRINT TIMENOV.27 8 58PM

communication netwo~k and paying attention to the movement of a program module and the cooperation functions among distributed controllers in the ~ystem.
Another ob~ect of ~his invention is to provide a distributed control system composed of a plurality of distributed contr~1ler~ and a di~play controller conn~ct~ via a comm~nication network which is excellent in the operability, economical efficlency, maintainability and reliability, by ~liminating the oper~tion analyzi~l~ work which ls conventionally perfor2ned and without increa~ing the load of the communication network, by utilizing the fact that the dlstrlbuted controllers are connected to the co~munication network and paying attention to the movement of an operation analyzing program module.

Still another object of this invention is to provide a distributed control sys~em compc).~ of a plurality of distributed controllers and a display controller connected via a com~unicatlon networ~ which is excellent ln the operability, economical efficicncy, maint~in~bility ~lld rellabllity, by el~minating the work fo~ a patrol which is conventionally performed, without increasing the load of the communication network, by u~ilizlr~g the ract Ihat ~he di~tributed controllers are connected to the communication network and payinq attention to the movement of a monitoring pr~gra~ module and the cooperation function~ among distri~uted controllers in the ~ystem.

RECEIVED TIMENOV 27. 7:58PM PRINT TIMENOV.27. 8 58PM

Still a further object of this inventlon is to provide a ~i~Lributed control system composed of a plurality of distributed controlle~s and a display controller c~nnected vi8 a communication network which is excellent in the operability, economical efficiency, maintainabilLty and reliability, b~r eliminatinq the setting work w~ich i~ conve~tionslly p_rformed, extending further the rang~ of the setting function, optimizing the setting value and the distributed control characteristics ~ ickly arLd anonymou~ corresponding to Lhe change in the electric power system, without increasing the load of the communication network, by utilizlng the fact that the di~tribut~ controllers are connected to the communication network and paying attention to t~e moveme~t of a settin~
program module.

These and other objects of this inventi~n can be a~hie~ed by providing a monitor and control system, including a plurality of processing units, each for monitoring or cont.rol~ an equipment by inputting ~ at~tus qudIlLl~y o~ the equipment, and a display controller connected to each of the processlng units via a co~ununication network, for displaying and controlling an oper~Lion and status of each of the processing unlts for ~onitoring. The display controller is provided with prosram module sending unit ~or sending out a program module corresponding to contents for display control in the display controller to each of the processin~ units ~rla the RECEIVED TlMENQ'i.27. ,:$8PM PRINT TIMENOV. 21. 8:58PM

communication network. each of the processin~ unit~ is ~ro~rid~c~ with, a prograrn module ecelvlno unit for receiving the progra~ module from the display controller o~ another one of the proces~ing units, an executing unit for executi~g the received pr~yram modL~le, and a transfer Unit for transferring an execution result by the execution unit or the progra~ modulo stored in the processing unit to the display controller or another one of the processing units via the communication network.

According to one a~pect of this in~ention, there is provided an el~ctric power 6y3tem protection and conlrol sy~tem, including a plurality of protection controllers, each for executing protection and control o~ an electric power system by inputting a ~tatus qu~ntity a~ t~e electric power system and for converting the status quantity into digital data, and a display controller co~nected to each of the protection con~rollers via a communication net~ork, for displaying and controlling an operation and status of ea~h of tho protcction controllers for monltoring. The display controller i~ provided with program module sending ~nit for sending out a program module corresponding to c.ontents for di6play contr~l in the display controller to one of the protection controllers via the communication net~ork, respectively. Each o~ the protection cor~trollors iE; pro~rided with, ~ program modllle receiving unit for receiving t~e program module fro~ the dlsplay controller or REOEIV~D TIMENQV.27. 1 58rM PRINT TIMENOV.27. 8:57PM

another one of the protection controllers via the co~munication ~twork, a~ ~xecution ~nit for executing ~he received program ~odule, and a transfer ~nit fo~ transferring an execu~ion result by ~he execution unit or the program module stored in the.prolection con.roller to the display cont~oller or another one of the protection controllers via the communicati~n nPt.wo~k.
According to another a~pec'c of this invention, the~e is provided an electric power system protection and control system, includinq a plurality of prot~tion c~ntroller~, cnch for executinq protectlon and control o~ an elec~ric power system by i~putting a status quantity of the electric power system and for converting thc ~tatu3 qunntity into ~igltal da~a, and a display controller connected to each of the protection controllers via a com~unication network, for displaying and co~t~ollin~ ~n operation and sta~us Or eac~ of th~ protection controllers for ~oni~o~ing. The display controller i~ provided .with operation analyzing program module ~ending unit for se~ding out an operation analyzing program module for analyzing an operation of one o~ the protectlon c~nntrollers to on2 of thc protect~on controllers via the communication network, respectively. Each of the protectlon cont~ollers i~ provided with, ~n o~er~tion analyzing program ~odule recei~ing unit fur receiving the operation analyzing program module from the display cont~oller or another one of the protection controllera ~ia the communlcation ne~wc~rk, a knowledge adding unit for executing the received operation analyzing program module and RECEIVED TIMENOV 27. 7:5&PM PRINT TI~ENOV.27. 8:57PM

ror giving an execution re~ult as a kno~ledge of the operation analyzlng program module, and a sending unit for 3ending the operation analyzing p~ogram Inodule after added with the knowledge to the display controller or another one of the p~otection controllers via the communication network. The display controller is further pro~1ded with, a r~ce~ving unit for receiving the operation analyzing program module after added wlth the knowledge sent from one of the protection controllers, and a ti3play unit for displaying ;~ recelved result in the recei~ing unit.
Accord~ng to another aspec~ of this invention, there i5 provided an electrlc power system protect~on and control system, including a plurality of protection controllers, each ~or executing protection and control of an elect~ic power system by inputting a status quantity of the electrlc power sy~tem and for converting the status quantity into dicrital data, an~I a display controller con~ected to e~ch of the pro~ection controllers via a communication network, for displaying and controll~ng an operation a~d ~tatu~ of each of the protection controllers for monitoring. the display controller is provided with monitoring program module se~ding unlt for sénding out a monitorlng pr~yrdm mo~ul~ Lor monitorlng a statu~ of one o~ the protection controllers to one of ~he protection controller~ via the communication network, re5pectively. each of the protection controlle~s is provided w~th a monitoring program module receiving unit for receiving the monitoring program RECEIVED TIMENOV.27. 1:58PM PRINT TIMENOV.27. 8:57PM

mo~ule ~rom the display controller o~ another one of the protection controllers via t~e communication netw~rk, ~
knowledge adding unit for executing the received monitoring program module and for giving an execution result as a knowl~dge of the monltoring progL~m nLodule, and a sending UAit for sending the ~onltoring program module after added with the knowledge to the display controller or another one of the protection contr~llers vla the communication network. The dl~play controller is further provided with a receiving Unit.
rO~ recei~ing the monltoring program module after added with the ~nowledge sent from one of the protection controllers, and a display unit for displayi~g a rece.iued result in thc recei~ing unit.
According to another aspect o~ this invention, there is provided an elec~r;c ~ower ~y~tem protection a~ld c~ntrol system, including a plurality of protectio~ controllers, each for executing protectlon and control of an electric power ~y6tem by inputting a ~t~us quan~l~y of the electric power system and for converting th~ status quantlty into diqital data, and a display controller connected to each of the protection controllets ~ia a communication network, for displaying and controlling an operation ~nd status of each of the ~rotection controllers for monitoring, The display controller is provided with a setting program module sending unit for sending out a settinq program module fnr setting for ~ne of the proteCtio~
controllers to one o~ the protection controllers via the P~ECEllED TIMENOV.21. 7:58PM PRINT TlMENOV 27. 8:57rM

communication network, respectively. Each of ~e protection controllers is provided with a setting program module receiving unit for receivi n5 t~e setti~g pxogra~ mod~le fro~ the dL3pl~y controller or another one of the pro~ection controllers via the communication ~etwork, a knowledge adding unit for executing th~ received ectting program ~odule ~nd ~or givlny an executlon result as a knowledge of the setting progra~ mod~le, and a sending unit for sending the setting progra~ module a~ter added wlt~ the ~nowledge to the display con~roller or another one of the protection controllers via the communication network. The display controller is further provided with, a ~eceiving unit for receiving the setting program module after added with the knowledge sent from one of the protection controllers, ~nd ~

display unit for displaying a re~eived result in the receivlng unit.

According to still another a~pect of thi~ in~ention, there is provided a distributed control system, including a plurality of distrlbuted controllers, each rO~ controll~ng an equipment to be controlled by inputting a status quantity of the equipment and for converting the status quanti~y into digital data and a display cont~oller connected to each of the distributed controlle~ via a communication net~ork, for displaying and controLling an operation and status of each of the distributed controllers for mo~itoring. The di~play eontroller ~.~ provi~ w~th a progra~ modul~ se~ding unit f or PECEIVED TIMENOV.27. 7~ M ~INT T[MENOV.27. 8:57PM

~ending out a program module corresponding to content~ for display con~.rol in t~e dizpl~y col~troller to one of the di~tributed controllers via the communi~ation net~ork, respectively. Eac~ of the distributed controllers being pro~ided with, a program module receiving unit for receiving the program module from the display controller or anothe~ one o~ the distributed controllers via the communication network, ~r~ execution ~nit for execu~ing the received program ~odule, and a trans~er unit ~or transfe~ring ~n execution result by tl execution unit or the program ~odule stored in the distributed controller to the display controller or another one of the distributed contro]1ers via the co~municati~n rletwork.

A~co~ding to another aspect of this invention, there is pro~id~d a monitor ~nd contL~l devlce, including a plurality of proces3ing units, each for monitoring or controlling an equip~ent by inputting a status quantity o~ the equlpmene; and ~ dis~lay con~roller connected to each of the processing units via a co~nmunication network, for displaying an~l controlling an operation and statu~ of ~ach of the processing units for monitoring. The display controller is pro~ided wlth a progra~
module sending unit for sendin~ out a progr~m module correspondi-ng to contents for display cohtrol in the display controller to each of the processing units via the comml~nicatlon n~t~ork. Ea~h of the pr:ocesglng units i~
provided with, a program mod~le recei~ing unit for receiving 2E~EIVED TlMENO'i./7. 1:5QPM P21NT TIMENOV.27. 8:57PM

the program module fronl the display controller or another one of the proce~sing units, an executing unit for executing the received program module, an~ ~ trans~r unit for tr~n~e~ing an execution result by the execution unit o~ the program module stored in the processing unit to the display controller or another one ef th~ proc~s6ing unit~ th~3 communlcation network.
According to another aspect of this invention, there is provided an electric power sy~e~ protection and control device, includi~g a plurality of protection controllers, each for executing protection and control o~ an electrlc power ay~tem by lnputting a status quantity of the elect~ic power sy~tem and for converting the status quantity into di~ital data, and a di~play controller connected to each of the protection controllers via a communication network, for displaying and controlling an oper~t.ion and status o~ cnch of the pr~tection controllers for monitoring. The display controller is provided with a program module sending unit for sending out a program module correspondir~g to contellLs for dl~play control in the display controller to one of the protection controller~ via thé
communica~ion network, respectively. Each o~ the protectlon controller~ ls pro~ided wlth~ a program module receiving unit for receiving the program module from the display controller or another one of the protection controlLer~ via the communication network, an execution ~nit for executing the received program module, and a transfer un~t ~or tran~ferring an exec~ion RECElVED T~ ENOV.27. 7:5~P~1 P~INT TiME~OV.27. 8:57PM

res~lt by the execution unit or the program module stored in t~le protec~ion controller to the display controller o~ another one of the protection controllers via the co~munication network.

According to still another aspect of this in~eneion,. the~e is provided a pro~ram st~i n~ m~dium readabL~ by ~ co~puter, tangibly embodying a progra~ of instructions executable by the computer to perform method steps for a ~onitor and control system, including a plur~lity of pro~slng unlt~, each fo~
monitoring or controlling an equipment by inputting a ~tatus quantity of the equipment, and a display controller connected to ~acl~ of the proces3ing uni'cs via a communicatiorl ne~work, ~or di~playing and controlling an operation and ~tatus of each of the proce~sing units for monitoring. the method lncludes the 5teps of, program module sending step for ~ending out a program module corre~ponding to conten~c ~or display control in the display controller to each of the processing units ~ia the communication network, at the display controller, progra~
module recei~ring step for recei~ing the program mo~ule from ~he display controller or another o~e o~ the proce~sing units, at each of the processing unlts, executing step for executing the receiv~d program mvdul~, at eacn of the processing units, and transfer step ~or transfe~ring an execution result by the execution step or the program module stored in the proceSsing unit tO the display controller o~ another one of the p~oce~sing units via the comm~nication netwo~k, a~ each of th~ ~rocessing 3q RECEIVED TIMENOV r~7 7 58PM PRINT TIMENOV. 27 8:57PM

units, According t~ another a~pc~t of thl~ lnvention, there is provided a p~ogram storing medium readable by a computer, .
tangibly embodying a prog~am of in~tructions executable by the ~o~putcr to perfornL~Iethod steps for an electric power system protection and control system including, a pluralit~ of protection controllers, each for executing protection and conLrol Or an electric power system by lnputting a status quantity of the elect~ic power syste~ and f~r conv~rting the statu~ quantity into digital data, and a display controller connected to each of the protectlon controllers via a co~ununication netl~rnrk~ for displaying and contrc~lllng an operation and statu~ of each of the protection controLlers for monitoring. The methods includes t.he step~ of, program module sendi n~ step for 6ending out ~ proyra~ module cor~esponding to contents for d~splay control in the display cont~oller to one of the protection controllers via the communication network, reapcctively, at t~e display controlle~, program ~odule receiving step for receiving the pro~ram ~nodule frt m the di6play controller or anot~er one of ~he protection controllers via the communication network at each of the protection controllers, execution step for ~xe~uting th~ received progr~m module at each of the protection controller~, and transfer step for transferring an execution result by the execution step or the pro~Jram mo~lule stor~d ln thc protection c~rltroller to the di~play cont~oller or another one of the protection controllers BECEIVED TIMENOY. 21. 7:5~.!,1 PRINT TIMENOV. 21. 8:57PM

v$a the co~munication netwo~k at eac~ of the protection controllers.
According t~ another asp~ct o~ thi3 in~rention, ~here ls provided a program storing medium readable by a computer, tangibly embodying a program of instruction~ executable by the computer to perform rrLeth~d stepY Eor a dlstrlbuted control system includ~ ng, a plural~ ty of distributed controllers, each for controlling an equip~ent to be controlled by inputting a s~Lu~ quan~lly of the equipment and for converting the ~tatus quantity into digital data, and a di3play controller connec~
to each of the distributed controller~ via a co~ununication network, for displaying and controlling an operation and status of each of the distributed controll~rs for monitoring. The methods includes the step~ of, pro~ram module sending ~tep for sending out a program module correspondlng to contents for play control in the di~pl~y controLler to on~3 of the distributed controllers ~ia the co~munication network, respectively, at the display controller, program module receiving steE~ ~or recelvlng ~lle program module from the display controller or another one of the distributed controllers via the communication network at each of the distributed controllers, execution step for executing the recei~ed progran~ module at each of the distributed ~ontrollers, and transfer step for transferring an execution resuLt by the execution ~tep or the program module stored in the distributed controller to the di~play ~ontroller or another onc of the RECEIVED TIMENOV.27. 7:58PM PRINT TIMENOV.27. 8:57PM

distributed cont~ollers via the communication net~ork at each of the distributed controllers.

~RIF.F D~S~RTPTION OF THF. ~RA~I~GS

A more complete appreciation of the invention and many of t~e attendant advantages thereof wlll be readily o~tained as ~he ~ame becomes better understood by reference to the following detailed deccrip~cion when considered in connectiOlL
with the accompanying drawings, wherein:
FIGURE 1 is a diagram showing the construction of an electric power sy~tem p~otection and ~ontrol sy~tem according to a first embodiment of this invention;
FIGURE 2 i~ a diagram showing the correspondence between scr~o~ di6play menu an~ ~L-ogram modules in the first e~bodi~ent;
FIGURE 3 is a diagram for explaining an action of the first embodiment;
FIGURE 4 is a diagra~ showing an exA~le of the dcfinite construction of the first embodiment;
FIGURE 5 is a flowcha~t showing the processing content~ of the first embodiment:
FIGURE 6 i~ a diagram sho~ing the construction of an electric power sy~tem protection and control system according t.~ a ~econd embodimcnt of thi~ inverl~ion;
FIGURE 7 is a diagram for explaining an action of the REOEIVED TIME~OV 27 7:~8PM PRINT TIMENOV.27. 8:56PM

cecond embodiment;
FIGURE 8 i~ a diag~am for explaining an action of the .ond embodimant;
FIGURE 9 is a diagram showing the construction of a part of a~ electric power ~ystem protection and control system ~ccording tv ~ third embodiment of this invention;
FIGURE 10 is a diagram showing an example of an electric power system to which the third embodiment is applied;
FIGUR~ a diagram for explai~ing an action of the third embodiment;
FIGURE 12 is a diagram fo~ explaining an action of t~e third embodiment;
FIGURE~ is a d~agram ~howing the Con-~trUCtion UL' an electric power system protection and control system according to a fourth embodi~ent o~ this invention;
FIGIJRE 14 i9 ~ d~ay~-am fo~ explalnlng an action of the fourth embodiment:
F~GURE 15 is a diagram showing the construction of an electrlc power ~ystem protection and control system according to a fifth embodiment of this invention;
FIGUR~ 16 i3 a dlagra~ for explaining an action of the fifth embodiment;
FIGURE 17 is a dia~ram sh~wi n(J the cons'cruction of an electric power system protection and control ~ystem according to a sixth embodiment of this invention;
FIGURE lB is a flowchart showing the proce~ing con~ents RECEIVED TIMENOV 27. 7:58PM PRIN~ TIMENOV.27. 8:56PM

of the sixth embodiment;
FIGUR~ 19 is a diagram showin~ the construction of a part of an electric power system protection and control sy~tem according to a seventh e~bodiment of this invention;
FIGURE 20 is a flowchart show~ng the process~ng content~
of the ~eventh embodiment;
EIGVR~ 21 is a diagram for explai~ing an action of the seventh embodiment;
FIGURE 2~ is a dia~ram showi~g the ~on~truction o~ an electric power system protection and control syste~ according to an eighth embodi~ent o~ this invention;
FIGU~ 23 is a Elowchart sho~ing ~he proce~sing content~
of the eighth embodiment;
FIGURE 24 is a diag~am for explaining an action of the eighth embodiment:
FIGURE 25 is a diagram showing the constructlon of an electric power system protection and control ~yste~ according to a ninth embodiment of this invention;

FIGURE 26 is a d~agram showing the con~truction of an electric power sy~tem protection and control sy~tem according to a tenth embodiment o~ this invention;
FIGU~ 27 i3 ~ d~agr~m showing the c~n~tTuction of a part of an electric power system protection and control syctem accordin~ to an eleventh embod~ent of this invention;
FIGURE 2~ is a diagram for explaining an action of the eleventh embodiment;

~ECEIVED TIMENOV.27. 7:58PM PRIIIT TIMENOV.27. 8:56PM

FIGURE 29 is a diagra~ showing the construction of an electric power system p~otection and cor.trol system according to a twelfth embodime~lL ~L L~is lnventlon;
FIGURE 30 is a diagram for explaining an action of the twelfth embodiment;
~ lGU~ 31 is a diagram for explaining an action of the t~el~th embodiment;
FIGURE 32 is a diagram showing the construction of a part of an electric power sy~tem protection and control system according to a thirteenth embodiment ~f th~.s invention;
FIGUR~ 33 is a diagram for explaining the concept of an adapti~e relay;
FIG~RE 34 ie a di~gr~m for explainlng an ~ctior~ of the adaptive relay;
FIGURE 35 is a diagram for explaining an action of the thlrteenth embodlment;
FIGURE 36 is a dia~ram showin~ the construction of an electrlc power system protection and control ~y~tem according to a fourteenth embodiment of this invention;
FIGURE 37 is a diagram for exPlalning an action of the fourteenth e~bodiment;
FIGURE 38 i~ a diagram for explaining an action of the fourt~qnth ~nibodiment;
FIGURE 39 is a diagra~ for explaining an action of the fourteenth embodi~ent;
FIGURE 40 i~ ~ di~qr~m ~howil~g one examp1~ l~L a ~emote ~o RECEIlED TIMENOl r~7, 7:5~PM PRINT TIMENOV 27. 8:56PM

control system menu;
FIGURE 41 is a diagram for explaining an action of a ~onventional electric power system protection and control syste~;
FIGURE 42 is a diagram showing the construction of an example of a convcntional ~lectric powe~ 6y~tem protaction and control system;

FIGURE 43 is a diagram showin~ the construction of another exa~ple of a conve~lonal electrlc power system protection and control system.
FIGURE 44 is a diagram showing the construction of one example of a con~entional digital relay;
FIGURE 45 is a diagram for explaining an action of another conventional elect~ic powex ~ystem protection and contxol ~Ystem;
FIGURE 46 is a diagram ~or ex~ ln~n~ ~n ~ct.it~n ~f ~nother conventional electric power system protection and control system; and FIGURE; 47 i~ a cll~gr~m ~r e~plainir~g an ~Ction of ~nother conventional electric power system protection and control system, nF.TATTIF.n DFSCRTPTION ~F TH~. PRF.FF.RRF.n F.MRODIMF.~S

Referring now to the drawings, wherein like reference numc~rals desi~nA~.e identical or co~responding parts throughout RECEIVED TIMENOV.27. 7:58PM PRINT TIMENOV.27. 8:56PM

CA 022233l4 l997-l2-02 the several views, the embodiments of thi~ inventlon will ~e de~ribed below.

FIGURE 1 is a diagram showing the construction of an electric power system protection and control system according to a first e~bodiment of th~s invention. In FTÇURE 1, 10 $c a digital prote~tion controlle~ to perform the protection and control of an electric power syste~ l by inputting a 3tatus ~uantity S1 f~om ~lectric power ~y3tem 1 th~t is a ~ub~ecL L~
the protection and control and outputting a protection and control output C1 to electric power system 1, and it is co~p~sed of ~ y~am module recelving means lla, an execution means 12a and an execution result and program module returning/transferring means 13a.
Further, a display controller 20 remotely cont~ols plural protection controlle~s including digital protec~ion controll~r 10 and an another digital protection controller 40 in the same construction via a conununication network 30, and it has a program rnodule sending means 21a.
As the operations of this embodiment, a program module corresponding to the contents o~ the display on display controller 20 i~ fir~t ~erlt out by FJroyram m~dule ~endlng means 21 in display controller 20 via communication net~ork 30. For instance, program module~ corresponding to item~ of the remote operation menu shown in FIGUR~ 18 are sent out as ~hown in FIGURE 2.

RECEIVED ~IMENOV.27. 7:58PM PRINT TIMENOV.27. 8:56PM

Here, a program module i~ composed of a co~bination of d~ td ~nd the descrlption of steps to process them. For instance, in case of the setting menu described above, data are settinq values corresponding to protection controllers and procedural steps can be said to be those procedural step~ until these setting values are stored in a spec~if~e~ memo~y in protection controller.
The program module sent out is recei~ed by program module rP~ei~7ing means 11 in digital prote~tion controlltr 10 via comm~nication network 30 and executed by execution means 12.
The flow of the sending, receiving and exec~tion proce~ses of the progranl mo~ul~ in this case are summarized as ~hown in FIGUR~ 3.
The setting program module sent from the display controller is composed of set value data to be ~et and procedural steps (for instance, ln which memory the settl~g values are to be stored, to which process resident in the protection controller is to be requested). As a re.~ult, the detail~ ~rocess relative to the ~ettinq proce3~ is executed in the protection controller. That is, the proces~es are executed for such hardware re~ources as RAM, EEPROM (ne~), EEPROM
(fc>rmcr) in the protection contr~ll~I.
The~e processes are carried out so far between the display controller and the protection controlle~s as shown in FIGURE 19.
In ~hls em~odimen~, as the setting program module inco~porating these processes is moved to the protection controller ~ide and RECEIVED TIMENOV. 27. 7:5&F'il PRINT TIMENOV. ~7. 8:56PM

executed therein, the traffic on the communication network is reduced when compared with the prior art. Further the operator ~ 9 re~uired only to give new setting value~ tv tll~ clisplay controller. Accordingly, such the operation as before to ~end requests to the protection controller~ will not be required for operator.
After the p~ogram module is executed by execution means 12a, this execution result or the program module is proces8ed by execution result and prog~am module returning/trans~erring means (hereinafter referred to as returning~tran.qf~rrin~ m~an.c) 13a. For instance, in case o~ the ~ett~ng program ~odule described abo~e, ~hether the set result is satlsfactory or the set ~ralue i5 not ~ithin f;he ~pecified rangc and not proper is returned to display controller 20 via commun~cation network 30.
Further, it i~ also considered that the setting job is carried out ln t~e same contents ror plural pro~ec~lon controller~. In this case, the setting program module is transferred to other protection controller 40 using returning/transferring means 13. In protection controller 40, same means 41a, 4~a and 43a as protection controller 10 are provided and the setting program module is recei~ed by a program module receiving ~eans 41a, executed by an execution means 42~ in thLe same lnanner a~ ~le~crihed above, and t}~e execution re~ult is returned to display controller 20 or the setting program module is transferred to other protection controller by returning/tr~nsferring me~n~ 43a, and ~ru~

RECEIVED TIMENOV 27. 7:53PM P21NT TIMENO~ ~7 8 56PM

CA 022233l4 l997-l2-02 similarly.
A definite example of the ~resent embodiment is ~hown in FIGURE 4. Di~ital protection c~ntroller 10 ~ com~osed of an a~aLog/digital conversion unit 10-1, a-digital processing unit 10-2, an input/output interface 10-3 with external equipments ~uch as a circuit break~r, etc., 3 co ~ Unic~tion interf~ce 10-4 to interface communication network 30 and this protection controller 10 and a bus 10-~. Further, alL the unlts 10-1 ~hrough 10-4 are ~utually connected t~rough bus 10-5.
Analog/digital conversion unit 10-l i-~ composed of an analog filter, a ~ampling hold circult, a multiplexer, an analog-to-digital converter, etc. and taking the status qua~titie~ (for instance, curren~, voltage) of an electric power sy~tem that i~ subject to the protection and control as an analog information and after holding a~ a ~pec~f~ed sampling int~rval, th~y are ~onverted in~o digital quantitio~.

On the other hand, digltal proces3ing unit lO-2 is co~po~ed of a CPU 2-1, RAM 2-2, ROM 2-3 and non-volatile ~emor~
EEPROM 2-4. Th~ digital ~onvert~d qual-titi~ ~r ~lecLrical quantity data are transferred tO RAM 2-Z sequentially. ~y these data, set ~alues of protective relays stored in EEPROM 2-4 and programs from RAM 2-2 and ROM 2-3, CPU 2-1 perform~
various protection and control operations.
Here, the present invention differs from a convent~onal protection. controller in that a part of program is sent to RAM
2-2 through communication network 30 and processed as a pr~gr~m RECEIVED TIMENOV.27. 7:58PM PRIN~ TIMENOV.27. 8:56PM

in digital processing unit 10-2. The pre~ent invention ~eatures ~hat t~e program module~ ~ s sent to RAM 2-2 via conununicatlon network 30 and transferred to a Pl~M of another protection controller while in the conventional protection controller, programs a~e fixedly written in ROM 2-3. This digital processor 10-2 composes execution m~n.~ 12, and a part of receivir.g means 11 and returning/tran~fe~ring means 13.
Next, input/output interface 10-3 Ls an interface to take th~ state o~ ~xt~rnal coz~trol equipmcnt 3uch el9 inform~t~on on a breaker and to output protection relay operation, reset output, trip command, etc. to external equip~ent. ~urther, communicatl~l irlLerface ~0-4 ls one Or the features o~ this invention and connects an ethernet LAN with protection controller 10, as shown in FIGURE 4. Part of program module recelving means 11 and returning/tran~ferring mean~ 13 is reallzed by this co~unication interface 10-4.
That is, the program module from communication network 30 is recelved here and transferred to RAM 2-2. The prog~am mo~ executed in digital processin~ unit 10-2 is ~cnt to communication network 30 via this commun$cation interface 10-4 and transferred to display controller 20 or another protection controller. A definite example of tl~ ructlon or the electric power system protection and control system is as described above.
~ urther, as an example of a co~munication network 30, it is composed of a network co~necting protection controller~ in a P.ECEIVED TIMENOV 27. 7:58PM PRINT TIMENOV.27. 8:56PM

local range such as substation b~ an ethernet LAN, a network connectlng personal computers and wo~k ~tations in office and a wide area network connecting both the networks in a wide area, a~ shown in FIGURE 4.
The construction of an ether~et LAN is general and the explanation will be o~itted here. Further, as a wide area network, switching networks such as telephone circults are used.
Display controller 20 described above is achieved by a personal computer shown in F~GuRE 4. Progra~ m~dule ~cnding mean3 21 i~
achi~ved by a software in the personal computer and an interface cLrcuit of an ethernet LAN.
Next, th~ d~ cLions of the present embodiment will ~e described using the flowchart 3hown in FIGURE 5. First, the flowchart of the personal computer (display controller 20) side w$11 be descrlbed. The remote operation menu described above is di~played on t~e display of the personal computer, and an operator selects an item in the remote operation menu in Step Sl-la. For instance, when the setting job is selected, a ~at.tin~ pr~r~m mo~ re~ 0~1t in Step Sl-2a.
In Step 51-3a, operator qives such data as a name of equipment of which sett~ng is to be changed, a name of setting element to be ch~nged, ~ set ~alue, etc. to thi~ s~tLi~ly program module. In Step Sl-4a, these data are 3tored in the setting program module and the setting program module is sent out to communication network ~U. The details of program sending means 21 are as described above.

BECEI~ED TIMENOV.27 1:58PM PRINT TIMENOV.27. 8:55PM

- - -Then, protection controller 10 receives the ~etting pr~gram module in Step S2-la and stores in RAM 2-2. This operation is equivalent to progra~ module receivins means lla.
In step S2-2a, thi~ setting program module write~ settlng ~alues in RAM, ~PROM (new) and E~PROM (former) in order ~hile checking them a~ ~.s~ih~d ~b~e. This operation i~ qquival~nt to execution means 12a.
So far, da~a receiving and ~equest between the setting proce3s ~nd EEr'ROH and RAM ~re m~lde ~ communication lleLwo~k 30 each time, but are all completed in protection controller 10 in thi~ invention. Then, the execution result i~ judged in s~ep s~-~a. I~ it is de~ective (for instance, the writing into EEPROM and RAM ~s incomplete and specified values are not written), the settlng is again needed and the defective result and the program module are returned to display controller 20 in Step S2-4a.
When t~e execution result i5 satisfactory and the setting to other controller is not needed in Step 52-Sa, the completion re~ult and the progra~ modulc arc similarly returned ~o di~pl~y controller 20 in Step S2-6a, Furthe_, if the setting to other controller is needed, a name of other controller described in the settlng program module ls read ln step ~z-7a and the setti~g program module is sent out with that equip~ent as a destination. T~e operations from Step~ S2-3a through S2-7a a~e equivalent to returning/tran5ferring mean~ 13a.

According to the above embodiment, a~ a pro~ra~ module RECEIVED TI~ENOV 27 1:58PM PRINT TIMENOV.27. 8:55PM

itself cor~esponding to jobs that are performed by operator are ~ent to the protec~ion controller from the ~i~play corltr~ll~L
~a the communication network for execution in the protect~on controller, it becomes possible to reduce the traffic on the communlcation network and improve the reliability. Further, as such works as operations corre~ponding to variou~ requests and the same work requ~red for plural controllers are no lon~er required as before, lt becomes possible to reduce workload of the operat~r and provide a highly economical and reliable electric power system protection and control syste~.
Further, this invention is not li~ited to an electric powcr sye:tcm only. E~ut this lnvcntion is al30 applicable to a distr~buted control sy~tem composed of plural distr~buted controllers to control equipments to be controlled by taking ~tatus quantitie~ therefrom and a di~play controller connec~ed to these distributed controllers ~ia a communication network to display and control for monitoring the operations and status of distributed controllers (or a program storage unit to store program module that is capa~le of operating on the distributed controllers~. In this case, in the embodi~ents described above, the protection controllers should be read as the distributed controll~rs.

FIGURE 6 is a block d~ agram showing the construction of an electric power system protection ~nd control system acco-ding to a second embodiment of this invention.

RECEIVED Tl~.5ENOV 27. 7:58P~5 PRINT TIMENOV.27. 8:55PM

In FIGURE 6, 10 is digital protection controller to carry out the protection and control of electric power system 1 by inputting status quantity S1 from electric power system 1 that is a sub~ ect to the protection and control and outputting pr~t~t.i~n ~n~ control ~utput C1 to ~l~ctrlc power ~ystcm 1.
It is co~posed of an operation analyzing prog~am module rece~ving means llb, a knowledge adding means 12b and a sendi~g mean~ 13b.

F~rther, di~play controller 20 performs the remote operation of plural controllers ~ncluding digital protection con~roller 10 and other controller 40 in the same con~tructlon vla communication network 30, and it has an operation analyzing program ~odule sending means 21b, recei~ng means 22b and display means 23b.
As its oPerations, dlsplay controller 20 first sends out an operation analyzing program module 50b by operation analyzing proqram module sending mean~ 21b v~a communication ~etwork 30. Opcration an~lyzing program ~od~le 50b in this embodiment is a progr~m ~odule having a function to perform the (collection of operating information) equivalent to checking o~

L~l~ corl~roller operation. T~e descrlptlon Or data and ~heir processing step~ i~ unified in the program module.

For instance, the following ite~s are achieved as function6:
1. Obtain the relay operating statu~ when the controllers are in operation.

P~ECEIVED TIMENOV 27. 7:5~PM PRINT TIMENOV 27. 8:55PM

CA 022233l4 l997-l2-02 2. Obtain electr~cal quantity when the controllers are in op~aLion.

3. Obtain related information ~input state, tran~mission ~ystem state) when the controller~ are in operation.
Data and steps for achie~ing the abo~e functions will be as follows:
Data:
A moving route for ~oving plural related protection contr~llP~.
Steps:
1. Obtain the relay operating state ~hen the controllers ~re ~ n operatiol~.
2. Obtain electrical quantity wl~en the controllers are ln operation .
3 . Obtain related information (input state, tran~misslon syste~ state) when the controllers are in oPeration.
Operation analyz ~ ng pro~ram module 50b in the con~truction as shown above and sent out ls received by operation analyzing ~rogram ~odlllca r~ç.~3iu1.n~ mc~anS 11~ in digltal protcction controlle~ 10 via commu~ication network 30. Thereafter, it i~
put in knowledge adding means 12b, where this program ~odule 50 i~ executed. Definltel~, the procedural pr~ s~3ing of operation analyzing program module 50b i~ executed.
That i~, relay operation data, electrical quantity data and related informatlon da~a s~ored in RAM when the protection controllerq are in operation are added a~ a knowledge to RECEIVED TlMENOi 27. 1:58PM PRINT TIMENOV.27. 8:55PM

operation analyzing progr ~ ~odule 50b. Def~nitely, they are added as one of data of ~hi~ program module 5~b. Thus, this oPeration analyzing program module 50b Ls moved to each protection controller and is executed at the moved dest~natio~, and the obtained result i5 added to operation analyzing program module 50b as th~ knowledge ~ucces~ively.
This state is shown in FIGURE 7. As sho~ in FIGUR~ 7, the operation analyzin~ program module ~oved into the protection controller 1~ pl'O~ SS~ Wi~ AM storlng the opera~clng infor~ation in the protection controller. Operator is required only to gi~e a moving route to the operation analyzing program module on the display controller. Accordingly, requesting data and response data do not go back and forth complicatedlY on the co~munication network as shown in FIGURE 45.
The operation analyzing program module executed and added wi~h t-ha knowl e~e a.~ described above ls returned to display controller 20 or trans~erred to other protection controller 40 by sending mean~ 13b via co~municatlon network 30. Here, ~hether the program module is ~o be ~eturned to di~play controller 20 or transferred to protection controller 40 i~
determined according to the data that designated the moving route. T~is moving route data is judged by operator from the system execution aspect and given to the operation analyzing program module.
There is such a merit that when the operation analyzing pro~ram module is transferred to other protection c:c~ntr~

RE~EIvED TIMENOv.27. 7:58PM PRINT TIMENOV.27. 8:55PM

and its execution at all cont~ollers that are ob; ects for the operation analysis is completed. Then the operation ar.alyzing program module i~ finally returned, operator is required to confirm it on the display only one time. In protection controller 40, it is pro~ided with the similar means such as protectlon controller 10; that is, a~ operation analyzing progra~ module rec.eivin~ m~ns 41b, a knowledge adding means 42b and a sending means 43b are pro~ided, and the operation analyzlng program ~odule i5 first recei~ed by operation analyzing progrsm module receiving 2ncane 41b, executed ir~
knowledge adding means 42b in the sa~e manner as described above and added with knowledge, and its execution re~ult and the program module are relurned ~o dlsplay controller 20 ~
further ~ransferred to other protection controller by ~ending means 43b, and processed in the same manner.
The operation analyzing program module transferred or r~t.llrned as described above is received and displayed by receiving means 22b and display means 23b of di~play co~troller 20. Contents (for in~tance, relay operatlon, e~ectrical quan~ity, etc. ) atded by each Or the protect~10n c~nt.r~llers a~
the knowledge of the operation analyzing program ~odule are displayed in a form of a ~able in display controller 20.
'l'his s~ate ls shown in FIGURE a. FIGURE ~ ~howa d~t~
collected by the operatlon analyzing program module moved to two transverse differential protectlon relays ln~talled at both ends of resistance grounded neutral sy-ctem parallel ~wo circui~

RECEIVE~ TIMENOV r/, 7:5.~P~ PRINT TIMENOY. 27. 8:55Ph~

transmission lines when they are operated by a sy~tem ~ault (a sinqle line earth-fa~lt of ~o. 1 line) in a form ~or ~asy to understand by operator. In a con~entional system, data are displayed on the screen by each co~troller and each item, and th~ chGckinq work wa6 complicated. Here, the relays (~w~ relay elements of 150G and 64 were operated) that were operated in both controllers (controllers 10 and 40), electrical quantities ~RMS valu~ and phase) and rela~ed informallon are ~hown in a table.
A de~inite example of construction of this embodiment is shown in FIGURE 4. Digital protection controller 10 is compo~ed of analog-to-digital conver~ion unit 10-1, digit.Al processor 10-2, input/output ~nterface 10-3 with external equipments such as a ci~cuit beaker, etc. communication interface 10-4 ~ int~rfac~ communicatlon n~twork 30 with this protection controller 10, and bus 10-5.
All units of 10-1 through 10-4 are connected to each other Vl~ bua 10- 5 . Ile~e, the compollent ~l~ments other than communication interface 10-4 are the same as those described for prior art as s21own in FIGURE 44. This invention differs rrOm a conventional protection controller in that a par~ of program modules (the operat~ on analyzing progra~ module in this em~odimen~) is sent to RAM 2-2 via co~munication interface 10~4 from communication network 30 and proce~sed as a program in diaital processor 10-2.
The present invention features ~hat the operation RECE!VED TIMENOV.27. 7:58PM PRINT TIMENOV 27. 8:55PM

analyzing program module~ i~ sent to RAM 2-2 ~ia communication network 30 and tr~Aa~erred to ~ RA~ o~ another protection controller, while in the con~entional protection controller, programs are fixedly written in ROM 2-3. This digital pro~ or 1~-2 composes knowledge adding mean~ 12b, and a part of recei~ing means llb and sending means 13b.
Furt~er, commu~ication interface 10-4 is one of the featurec of this invention, and for instance, it connect~ an ethernet LAN with protection controller 10 ~s ~hown in this FIGUR~ 4. Operation analyz~ng program module receiving means llb and sending means l~b are partially achieved by this communi~tion intarface 10-4.
That is, the program module from communication network 30 is received ~ere and transferred to RAM 2-2. The program m~dule executed in digita1 pr~s~ing unlt 1~-Z ls sent to co~munication network 30 ~ia this communication inter~ace 10-4 and transferred to display cont~oller 20 or another protection con~roller. A defi~ite embodiment of the construction of the electric power system protection and control system is as de~cribed above~
~ urther, as an example of a communication network 30, it is composed of a network ~onne~ting protection controller~ ln 3 local range such as substat~on by an ethernet LA~, a network connecting personal computers and work stations in o~fice and a wido area networ~ connecting both the n~tw~Lk~ ln a wlde area, as shown in FIGURE 4.

RECEIVED TIMENOV.27. 7:58PM PRIN~ ~IMENOV.27. 8:55PM

Further, the construction of the ethernet LAN is generally known and its explanation will be omitted.
Fur~her, as a wide area networX, ~wltchlng networ~ such as telephone circuits are used. Display controller 20 de~cribed abo~e is achieved by a personal computer ~hown in FIGURE 4. Operation analyzing program ~odule sending means 21b is ach~eved by a software ln the personal computer and an interface circuit o~ an ethernet LAN.
According to this embodiment, as the operation analyzing work ~n this ~mbodiment, th~ ~oll~ction of th~ o~era~10~
information of controllers) so far performed by operator of protection controllers in changed 50 that it can be executed by L~l~ op~ration analy2ing progr~m module for operator.

Accordingly, it ~s no~ required for a per~on to go to each su~station for collecting the operating information of the protection controllers when a system lault occur~, and th~s, it becomes possible to sharpl~ reduce labor.
Furthex, the ~yste~ has such a mechanism that the data obtained i~ co~nection with the co~troller operation can be adde~ in t.he operation analyzing program module. As a re~uLt, it becomes possible for remote operator to easily get details of the operating contents o~ all controllers relative to system ~ault~ ~nd to confirm them. Thue the operability of the sy~tem can be pro~oted.
Further, a~ the operatlon analyzing program module it~elf corre~ponding to the operation analy~iu~ work l;~laL ix so far RECEIVED TIMENOV.27. 7:58PM P21NT TIMENOV.27. 8:54PM

performed by operator o~ the protection controllers is sent to the protect~on controller ~rom thc displ~y controller ~ia th~
communication network and i5 executed in the protection controller, the commu~ication procedure shown in F~GURE 45 is e~ in~ A~ a result, t~e volume o~ eomm~nication on the communication network can be reduced, and reliability of the 6yste~ also can be promoted.
Furthermore, the operation corresponding to requests and the 8ame work so far performed fo~ plural controllers are no longer needed. Operator is required only to send the oper~tion analyzing program module to the communication netw~rk. A~ the operation ~n~ly7ing ~rogram module its~lf i~ able to ~ovc among the protectlon controllers while obtaining, judging and adding the operating information in each protection controller autonomou~ly a3 additio~al ~nowledge, no det~ d instructlon and check o~ operator are needed. As a re~ult, it becomes po~sible to redu~e the workload o~ opera~or and provide an elect~lc pawer ~y~tem protection and controL system having a highly economical efficiency and reliability.
FIGURE 9 is a block diagram showing a part of an electric power system protection and control system according to a third embodiment of thi~ invention. Further, FIGURE g Rh~w.c th~
status diagram o~ operation analyzing proqram module 50b that is receiving specified information in digital protection controller 10. In FIGURE 9, the conseruction o~ oper~tion analyzing program module 50b that is sent to protection RECEI'IED TIMENOV.27. 7:58PM PRINT TIMENOV.27. 8:54PM

controller 10 from display controller 20 and moves among the protection controllers explained ln the embodiment described abovc ia 6hown. Digital protection controller 1~ is pL-ovided with an operating infor~ation input means 14b to give the controller operating information to this progra~ module 50b and a controller lnfor~atlon lnput means 15~ to give information as to what range o~ an electric power system is made an object for the protection and contxol by the digital protection controller~. Operation analyzing program module 50b is provided with a moving route control mean~ 51b, which controls the moving route of operatio~ analyzing program module 50~
ac~ording to the~e information a~d correct~ the moving route bas~d on th~ operating inform~tion and controller informatior o~ the controller~ at the de~tination.
As a result, it beco~es possi~le to control the optimum mo~ing r~ute ~ the ~pe~ation analyzing pr~yram modul~
corresponding to the operating state and the controller information of the protection controller-~. Conventionally, in a digital relay, the range to be protected by each controller is decided and pro~ected indi~idually. On the other hand, when a b~stem fault occurs, each diqital relay performs the protection of the predetermined range to be protected. As operator has the i~formation on the range to be prota~tf~ ~y each controller, if a system fault occurs, operator goes to each substation to obtain the operating ~ta~e of the related digital relay bascd on ~che occurring state of the syatem ~ult RECEIVED ~IMENOV 27. 7 $8,M PRINT TIMENOV 27. 8:54PM

and the information owned by the operator on the protecting range.
For in3tance, in FICUPE 10, total 6 controllers of current differential protective relays lLA, lL~, lLC, 2LA, 2LB, 2LC are provided a~ terminals A, B, C for protection of 3 terminal parallel two clrcuit tran~mlsslon llnes, Ir a ~lngle llne earth-fault occurs on No. 1 line of this ~ystem, operator ~ ~udges that controller~ lhA, lL~ and lLC relate to thi~ sys~em fault from the aspect of the ~ystem fault ~nown from ~n oscilloqraPh equlPment etc. and the protecel~n ran~e of each digital relay (the transmission line 3ection from own terminal to other two terminals)~ In order to obtain this operating infor~Lation, operator ~0~8 to a ~ub~tation wherein the controllers are provided, or communicates ~ith each of the digital relays and collects the operat1ng information ln~lividually u~ing tl~e rem~te ~peration monit~ring systerrL
described above.
Accordingly, operator is needed ~o make the judgment a~ to which controller information should be obtained from the a~pect of the fault and the protection range o~ individual relay~ As a resul~, the workload ~cluding the information obtaining ~ork of individual controller i~ much and complicated, and also, a human error tend~ to be produced. Further, if new faults occur ~requently whlle obtaining in~ormation of indl~idual controller, there is such a problem that another judgment and work for operator are re~uired.

RECEIVED TIMENOV.27. ,:58PM PRINT TlMENOv 27. 8:54PM

According to this embodiment, each digital relay ha~ a table sho~ing its own protecting range and the range of an el~ctric power sy~tem related to rel~y elcrnents 5torecl therein by correlating the relay elements with related ~ontrollers as ~hown in FIGURE 11. This is called a~ a controller infor~ation.

Shown ln Ihls FIGURE; 11 1~ an example in ~ase of controller lLA and a table ~howing which digital relay ~s related, when current differential protect~ve relay~ 87S (for short-circuit) and 87G (for earth-fault) p~o~ided in controller lLA operated. Further, as an oPeratinq in~ormation of the controller, for in~tance, in case o~ the earth-~ault of No. 1 line, controller lLA ha~ such the operating infor~at~ on that shown in FIGURE 11, in which the controller operating fault and the operating relay ~87G in thi~ case) are correlated.
According to this embodiment, when a sy~tem fault occur~ed, ~ r i~ n~e~ to ~nd th~ oper~ti~ ly~i~Ly pr~yram module (the function of the second emb~diment added with moving ro~te control means 51b de~cribed above) only to one controiler (lLA in thi~ e~bodiment) that is considered to relate to thi~
fault from the aspect of the fault obtained from an oscillograph equipment, etc.
At controller l~A to which the operation analyzing program module is sent, a~er collecting ~uch the relay operating fitate, electrical quantity, related i~ormation, etc. as shown in thi~
embodiment, the above stated operating information i~ taken into oper~tion analyzing progra~ module SOb and coll~ted with ' 60 RECEIVED TIMENOV.27. 7:58PM PRINT TIMENOV.27. 8:54PM

the abo~e controller information by moving route control means Slb. As 87G is operating here, the program module move~ to controllers lLB and lLC which are t.he controllers related to this fault to obtain the contents of operation simila~ly, and it is returned finaLly tc the display controller which diQplays the obtained data to operator.
Thus, without communicating with the controllers lLB and lLC and reque~ting lnformation by operator, the operation ~n~lyzing prvgram ~ ule decldes the ~oving route autonomously and moves from the in~or~ation retained by the digital ~elays.
This state i9 shown in FIGtJRE 12(A). Eu~ther, if a new fault occurs while ~oving ~for in~tance, moving from lLA to lLB), the newly oc~urred fault and operating relay element are added to the operating information, Thus, when this program module arrive~ at l~B, it is able to recogni.7.~ t~at the related c~tr~llers are lLC and lLA from the controller information and this updated operating information. After obtaining the contents of operation at 1~, the prog~rr mod~lle mo~res to controll~rs lLC, l~A and t21e display controller to obtain the contents of ope~ations. Here, as the operating contents of lLA at the initial fault wa~
obtained, the operating content~ only at the ~econd ~ault are obtained. Thus, even when plural faults are taken place continuou~ly, all of them can be conveyed to operator. This state ~s shown in FIGURE 12(~).

A~ described above, according t.~ tllis en~odiment, it 1~ eo RECEIVED TIMENOV 27. 7:58PM PRINT TIMENOV. 27. 8:54PM

made that the operation analyzing program module ha3 own mo~ing route and obtain the contents of ope~ations o~ the controllers, by deciding ~ moving route by referring to tl~e ~on~roller information and operating information retained by the protection controller3 or while correcting a mo~ing route for successively occurrlng system ~ault~. Accordingly, it becomes possible to minimize the workload of operator without causing human errors and pro~ide an electric power sy~tem protectlon and control system having a high economical e~ficiency, reliability and operability.
Further, fault~ occurred in the p~otecting section only are made ob;ect~ of the controller infor~ation in the abo~e embodi~ent. ~ut, the operation analyzing program modulc ic able to coLlect the operatlng information in the fault taken place in a wider range when the controller lnformation is set to lnclude the rault~ taken place outslde the pro~ecti~g sections. For instance, when an undervoltage relay (27~ with an operating quantity of a bus voltage common to No. 1 and 2 lines and controllers ~6 controller~ shown abo~e) corre-~ponding to this relay ~27) are regi~tered in the operating information in the above embodiment, the undervoltage relay operates against faults of both ~o. 1 and 2 lines, and therefore, the operation analyzing pro~ram module i~ abl~ to move to all of the 6 controllers and to collect the contents of their operations.
Thus, even when the controller-~ did not operate properly RECEIVED TIMENOV.27. 1:58PM PRIN~ TIMENOV.27. 8:54PM

at complicated fault~, there is such a ~e~it that i~for~ation about the ~elat~ve controlle~ can be easily collected in this m~dificatlon, ~t3 ef~ect i~ the ~me. Further, even w~en the controller information is not ~etained in the digital relay, but all controller informations of all objecti~e controllers al-e ~Lained collecllvely in the dlsplay controller and are gi~en to the operation analyzing program module when it is ~ent out, it~ effect is the same.
FIGURE 13 is a block diagram showing the construction of an electric po~er sy~tem protection and ~t~ntrol Systam according to a ~ourth embodiment of thi~ invention.
In FIGURE 13, 10 and 40 are digital protection co~trollers, 20 is di.~pl~y ct~ntroller and 30 is co~Lunicatior~ network, and the con~truction is ~he same as that in the above embodiment and the detailed description will be omitted. In this e~odiment, an operating ~L~Le predlctlon knowledge ba~e 60b qtori~g the knowledge predicting the operating ~tate at a ~ystem fault occurred i~ provided. Further, a verifying ~ea~s 5~b to verify validity of the operation of the protection controller by comparing the operating information collected by operating analyzing program module 50~ with data from thi~
knowledge ba~e 60b is provided ~n operatlon analyzing program module 50b.
Here, operating state prediction knowledge ba~e 60~ is realized by a work station or a personal computer. It i~ a data ba~c to correlate how the relAy elem~ s1~ored ln the RECEIVED TIMENO~ 27. 7 58PM PRINT TIMENOV.27. 8:54PM

digital relays operate again~t predicated various faults of an objective electric power system. It is prepared in advance fro~n the ~imul~tion of th~ objective electrlc power 6ystem.
For instance, when the electric power system shown i~
FIGURE 10 is an ob~ect for the protectioA control, the contents o~ dbove ~lowledge base 60b takes such a ~orm as shown in FIGU~E 14~A), and the predicated operation of the relay elements of the digital rslay~ are correlated with the fault aspects. Operator give~ thi~ knowledge base 60b to operation analyzing program module SOb. Accordin~J to the ~ n~
embodime~t of this in~ention, if a syste.~ fa~lt occurs, the operation analyzing program module moves to related controller~
succescivE?1 y to collect the contents of their opc~ationa . If the fault is the earth-fault of No. 1 line shown in FIGU~E 10, the relay operating st~es in the conten~ of the operation Will be ~ s~own in FIGURE 14 (B) .
In this em~odiment, the data in above knowledge base 60b are ~ompared wlth this relay operating states by verifying means 52b in the operation analyzing program module. For instance, in case of ~he earth-fault of No. 1 line, the predlcted operating relay~ of knowledge ba~e 60b are lLA, ~7G, lLB, 87G, lLC, 87G, and the contents o~ opera~ion obtained ~y oPeration analyzing program ~o~lll e .~h fro~ the controllor~ as ~hown in FIGURE 10 are the same, and it can be ~udged that the operation~ of the controller~ are valid.

The operation analyzing progra~ module d~ splay~ t~

h~
RE~EIVED TIMENOV. 27. 7 58PM PRINT TIMENOV 27. 8 54PM

re-cul~ when returned to the display controller after moving to the controllers. As a ~esult, ope-ator is able to know the content~ of the operation3 of th~ controller3 and the v~lidity of the controller operations at the same time. On the contr~ry, if the content~ of the knowledge base do not agree with those of the controller operatlon5, ror ln~ance, lr relay 87G or controller lLC does not operate, it is veri~ied by the verifying means and displayed for operator, who i~ able to in~estigate controller lLC upon ~eeing the di~play.

Conventionally, such the validity verification wa~ made and judged by operator from his own knowledge after gra~ping the operating state of each digital relay indi~idually, and accor~ingly both th~ operation an~ wo.rk ~er~ ~o~ te~ wh~n complicated failure3 occurred.

According to this embodiment, as the validity veriflcation beLw~n th~a inflJrmatio~ ~rom the ~;nowledge b~e ~nd the operating information are executed in the operation analyzing program module, while moving among controller~, the validity can be verified efficiently and rapidly. Further, a~ the validity verification that is conventionally judged by operator is now executed by the operation analyzing progra~ module autonomou~ly and operator obtains its result only, the bu~en on oE~Pr~tnr can be minimized.

Further, if the validity is found to be a problem when the program module is moving among the controller~, it is possible for the progr~m module to rcturn to the dieplay controller RECEIVED TIMENOV.27 7:58PM PRINT TIMENOV 27. 8:5~PI,I

after collecting ~he automatic ~uperv~sing informat~on relative to that controller. Thu~, operator is able to rapidly obtain lnrormatlon relative to the controller that is possibly defective. Thus, it is possible to provide an electric power sy~tem protection and control system havlng highly economical efficiency, operability and reliability.
Further, in ~he abo~e embodiment operator gi~es related data fro~ the knowledge base to the operation analyzing proqram module. But the operation analyzing program module may move to the knowl~dqe b~c Allt.~nomously and m~es t~ the digi~l relays after obtaining rela~ed data, and in this cases, the ef~ect is the same. Further, in this case, the knowledge ba~e should h~re the communication interf~c~ and 'chc p~ogr~ra modul~

receiving and sending means likewise the digital relay.

In addition, in the above embodiment, both the knowledge base and the operating informa~lon are llml~ed to Ihe ~tate wherein the relays are in operation. But it is also possible to promote the accuracy of the ~alidity verification by adding electrical quantities and ~arious related information, when system failures occur, ~o the knowledge bace and operating information. The effect in this modificatlon is also equivalent to that in the above embodiment.

FIGURE 15 ~s a block diagram showing the construction pf an electric power system protection and control syste~

according to a fifth embodiment of this in~ention. In ~IGURE
15, lO 2~1tl 40 dre digital protection controller~ to per~orm the REOEIVED TIMENOV.27. 7:58PM PRINT TIMENOv. 27. 8:53PM

protection and control o~ electrlc po~er 3yslem 1 wlth i~put~
of status q~ ities 51, 52 ~ro~ ~lectri~ po~e~ system 1 which ls an ob1ect ~ the p~otQctfon ~d control and ~ILth protect~o~
an~ c~n~rol outputs Cl, C2 to electrlc powe~ sy6te~ l. Further, display controller ~0 is ~o re~otely o~erate digital protectlon controllers 10, 40 vi~ ~ommunlc~clon necwo~k ~0. These ar~ the same as in the second e~bodlment and ~he explanation will be omitted.
Sy~em ob~ervativn ~its 70~, 80~ ~re un~ tO take and acGum~ t~ electr~ cal ~uan~itie3 A1, A2, re~pectlvely ~rom elecc~ic pow~r 9ystem 1 that is ar~ object of ~he protec~ n a~c~
~ontrol, and an oscillograph equipme~t i~ a represe~tative un~
therefor. Thc dct3il~d con~truc~i~n o~ th~ unit~ ib the ~a~e as the construction of the dlgital r~lay ~hown in FIGU~ 4.
Further, operation ah~lyz~g program module 50b i~ a program rt~clule t~a~ ~g sen~ o~t o~ dlspldy controller 20, received and executed by proteCtion controllers lO, 40 and ~y~em obse~vatlon unlts 70b, ~Ob. ~h~ b~sic con~tructlon of this program module is the same a~ the cons~uctlon of the second em~odiment In this e~ dimer~t, thi~ prc~gr~m moclule is pro~l~ed wlth route cont~ol ~eanY 51b to c~ntrols th~ ~oute to sy~em obser~ion ~ni~ 70~ or ~Ob ~ whlch ~his progr~m modul~ 5~ is r~la~ b~sQd on th~ opc~ratin~ inf~ormation o~tained ~rom prot~ction con~rollers 10, 40 when sy~tem ~ault~
occur, and a ver~fying IneAns ~2~ to ver~fy the val~dity by C~ d~ing th~ el~ctric~l qu~ntitie3 ~ollcct~d f~om ~y~t~

RE~ElvED TIMEIIOV 2, 1:5qPM PRI;~ ~IMEI~OV Z7. ~ 53PM

F E E ~ r M ~ E~ E ~ F .

observatlon ~ni'cs 70b, ~Ob with ~he above ope~ating ~r~forrnatlon.
So far. when sys~em ~aults occur, operator makes the ~ate Or the ~ults clear ~y ob~alnlng current a~ volta~e ~ave~orm~
at the ~lme of ~ault from the syste~ ~h~ervation un~ to Xnow the state o~ faults, and ~u~th~r, checks validity ~etween the electrical quant~ties ohtained by o~ the ~ystem obser~ation unl~ a~d the o~e~ating state o~ the protec~o~ con~rollers ~y obtai~lng t~e~.

For inst~nCe, ope~a~r recognlzed whether a ~aul~ wa6 an ~arth-fault or a ~h~t-circui t ~ 1 t. ~n~l ~ cc~ntinlled ti~e of the raUlt rrO~ lnstanta~eous wavefo~s of current, v~ltage o~ained ~om the system ob.~ervation Unit a~d checked t~
v~ ity wheth~r the rel~y oper~tlng ~tate of each prot~ctLon c~ntroller was ~alid, u~neçessary relay eleme~ts were operated or relay ~le~en~s to be opera~ed were properly operable.
Th~r~ore, operator was neede~ ~o oh~aln data ~rom bot~ o~
~he ~yYtem o~ser~a~ion units an~ the protection can~rollers and make the judgment~ In particular, if a fa~lt occ~rs 1~ a wide range an~ is complicated, the data an~lysl~ fro~ ~ny ~y~tem ob~ervation unl~s and protection cont~oller~ beco~e~ necessary and workload may l~çrea~e an~ human error m~y result.
This e~bodiment i~ to ~olve s~ch proble~s and it~
operation w~ll b~ de~crl~ed kc~lcw. FLr~t, when- a systeTn f~lt occurs, ope~ator sends out t~e operation araly~ln~ program ~od~l~ o~ ~his embo~lm~n~ to a protect~on controller that ~as been operated ~o~ e sys~ell~ f~ult. Thls i~ the same ~ethod 89 6~
RECE!~ED TIMEI10;~ . 7 56PII PRI~IT ~I~E~IOV. 27. 8:53PM

that shown in the second embodiment.
This sent. oper~tio~ ~nal.yzin~ progra~ module o~ta~s the operati~g information from each protection controller. When as~u~ing that, for in~tance, a fault oc~urred in the system in FIGUR:E 10 ,~hown in the above e~Lbodir~ t ~ld ~3uch the operatlng in~ormation as ~hown ln FIGURE 14~B) was obtained. Gene~aily, the system observation unit is started by the relay operation o~ the protec~ion controller and the electrical quantlties before and after the system fault are acc~mulated.
Accordingly, this program ~odule i~ able to know that related sy~tem observa~ion units were started by obtaining the operating information of the ~rotection controll~r.~. ~y providing a table correlating the operating info~mation with the system observation units to the route control means, this program modul~, by r~erring to this table, movc6 to a corresponding sy3tem observation unit and collect~ the accum~lated electrical quantity.
Fur~ler, validity of the operatlon Or the pro~ection controllers is ~erif~ed by the ~erifying means by comparing the ~tate of the collected system electrical quantities ~magnitude of current, voltage and pha~es between electrical quantities) ~ith the operating information of the protection controllers.
For instance, in FIGUR~ 14(B), the current differential relay (87G) is in operation and the settinq value for operation of t.hi.~ ralay i.~ 1, nt~ .3mp~re.~ .urrent at the fault obtained from the system observation unit is above this ~et value, the RECEIVED T!MEN~Di 27. 7:5~P~il PRINT TIMENO~. 27. &:53PM

operation is judged to be valid. Thus, by pro~iding a rule to be able to verify the ~alidi~y in the verifying means by correlating the syste~ electrical quantity and re~ponded relay oper~tion, it is possible to ~udge vaLidity of the controller operations.
An example of the installation of t~e SYstem ob~er~ation units when taking electrical quantities of No. 1 and 2 llne~
and the ~oving route of the ope~ation analyzing program module ar~ shown in ~IGURE 16. ~ show~ i~ FIGURE 12, the operation analyzing prog~am module efficiently move~ to the protection controller and the system ob~ervation unit a~ each terminal in o~der, collects tl~ pel-~tiny i~lL~ma~ion and system electrlcal quantitie~, verifies validity between the~ and finally, inform~
operator the result by way of the display controller.
According to thi~ embodiment, as the operation analyzing program module collects not only the operati~g infor~ation of the protection controllers but also electrical quantities of the ~ystem observation units and is able to decide it~ moving r~llt~ Allt.~n~ ]y. Fllrt.har, i~. can ~rerify the validity of the controller operation from the collected informatlon and display the result to operator. Accordingly, it is possible to provide ~n clcctric powcr 5y3t~m protection and control ~y tem th~t i~
easy to operate, eco~omical and capable of ~inimizing the ~orkload of operator, as the required informatlon is erriclently obtained by sendin~ t~l~ progra~ module only once.
Further, the moving r~Ute of the operation analyzing PErElVED TlMENOi. ~-~ 58PM PRINT TIMENOV. 2,. 8:53PM

-program module is so set that it is mo~ed to the system obser~ation unit installed at the sa~e termlnal a~ the protection ~.ont.~oller ln the abo~e embodiment. But, when a .
specific relay element and the route control are combined, it becomes pos~ible to collect electrical quantities of sy~tem obaervation unitE ir~ a wid~r range. For in~tance, in the ~ystem chown i~ FIGURE 16, it i~ regi~tered in the route control mean-~ for the operation analyzing program module to move to system ob~erva~ion unlt~ aL~ CC by the opera~ion of such relay elements having no directi~ity as an overcurrent relay and undervoltage relay of controller 12A. The operation analyzing progriam module i8 able to collect the electrical quantity information of 3 terminals autonomously when external sy~tem fault occurs and it beco~es effective in the controller operation analys~s. The ef~ect of thi~ modifica~ion is the ~ame a~ th~ a~otre ~n~odiment.
Further, the operatlng state of the relay i~ uced as the controller operatlng information ~or the validity verification ln t~e abov~ en~bodiment. ~ut, whe~ the elec~rical ~uantitie8 obtained in the protection controller~ are further used and compared with the electrical quantities of the system observation units, i~ becomes po~slble to make Lhe verific~tion up ~o the analog-to-digital conversion unit and the relay computation. As a result, the accuracy of the validlty verlfication is increased and the effect of this modification is ~l~o the same ac the abo~e em~odiment.

RECEiVED Tl!~lENu~ 27. 7:5,r'il . PRINT TIME~IOV. 27. 8:53P~I

Further, thi~ invention iS not limited to a~ electric power system only. Bu~ this invention ls also applicable to a dl~trlbuted ~oslLr~l ~yste~ composed of plural distributed controllers to control equipment~ to be controlled b~ taking statu~ quantities therefrom and a dicplay controller connected to t~ese distributed co~trollers via a communlcaclon netw~rk t~
display and control for monitoring the opera~ionC and ~tatus of distributed controllers (or a program ~torage unit to ~tore an operation analyzing program module that is capable of operating on the d;.~t.ributed controllerq). In this case, in the embodiment~ described abo~e, the protection controllers should ~e read as the distributed controllers.

FIGURE 17 is a block diagram showing the construction of a~ electric power s~stem protection and control ~ystem accordlng to a slxt~ embodi~ nt ~f this invention.
In FIGURE 17, 10 is digital protection co~troller to carry out the protectio~ and control of electric power sy~tem 1 by inputting status quantity S1 from electrlc power system 1 that is a ~ubiect to the protection and control and outputting protection and control output Cl to electric power system 1.
It is composed of a monitoring program ~odule receiving means llc, a k~owledge ad~i t.ion means 12c and a sending means 14c.
F~rther, display contro~ler 20 remotely operates a plurality of controllers like dlgital type protection con~ r 10, and controller 40 of Bame COA~ guration, etc..

~ECEI'iED TIMENOV ~7. 7:5~PM PRINT TIMENOV 27. 8:53PM

via communication network 30. It is p~o~ided with a monitoring program module sendin~ ~ea~s 21c, a recei~ing means 22c and a ~di~pl ay ~eans 2 3 c .
As its operation, first monitoring program module 50c is sent out via co~munication nctwork 30 by monitoring program module se~ding means 21c in dlsplay controller 20. ~onitoring pro~r~m ~dule SOc in this embodiment is a prog~am module with function to perform the correspondent to patrolling wor~
descri~ed abo~e, which the description of data and to process it h~ b~en ir~corporated.
For instance, a~ functions the following are realized:
1. To acquire the automatic checking executing number of each con~roller, an~i Lv judge wheth~r i~ is nor~al.
2. To acquire the electrical quantity fetched to each controller, and to judge whether it i5 nor~al.
3. To acquire the relay operating s~ate of each controlLer, and to judqe whether it i~ normal.

4. To acqulre the abnormal contents ~a~tomatic supervising result) of each controller, a~d to judge whether it i8 normal.
Tho d~ta and ~r~edures to realize the above functio~s are as ~ollow~:
Data:
1. Autvmatic check~ ng r~u~ cr validity standa~d twhether the acquired ~alue ~urpasses that in the former time, and whether it is the same automatic checXing number of another controller which begin~ its operatlon at L~l~ Y~me time) REOEIVED TlMENO'i. 21. 7:53PM PRINT TIMENOV. 27. 8:53PM

2. Electrical quantity validity standard (Whether it is in the specified range and whether i~ is balanced ln three pha~es) 3. Relay operating state validity ~tandard ~Whether or no~
the relay element other than the relay element which operates by the power flow.) 4. Abnormal contents validity standard (Whether or not 4ven ~n ~ther controllers a same failure ls detected, that is to say, a failure factor i~ not outside the controller) erocedure:
1. To ~c~uire the ~u~omatic checking executing number, and to judge whether it is normal by comparing with the automatic checking nu~ber validity standard.
;Z. To acquire the electrical ~uantity fetched to e~ch controller, and to judge whether it is normal ln comparison with the electrical quantity validity standard.
3. To acquire the relay operating state of each controller, and to ~udge whether it is normal in comparison wlth the relay.
operating state validity standard.
4. To acquire the abnormality contents (automatic 3upcr~i~ing re~ult) of each r~.ont.rollP.r~ and to jud~e whether it is normal in comparison with the abnormality conte~t validity standard~
In thi~ r~ect, ~he d~t~ ulao i~cludc q mo~ing route designated in what mo~ing route the program module moves to a plurality of protection controllers. ~onitoring program module 50c configured and sent out as de~cri~ed above, ls received by RECEIVED TlMENOi. 27. I ~ PM PRINT TlMENOv 27. 8:53PM

~onitoring program module receiving means llc in digital type pr~tection controller 10 v~ communic~tion network 30.
Thereafter, lt ls put in knowledge addition means 12c, where program module 50c i8 executed. Concretely, the procedure for the processing of monitoring program module 50c i~ executed.
Th~s state is shown in a flow chart in FIGURE 18. Fir~t, in S1-lc the state in object in the protecti~e cont~oller, that is to say, automatic checking executing number, electrical quantity, relay operating state, and a'onormal contents are acquired. In S1-2c thi~ acqui~ltlon re~ult i3 compared with the above validity standard as to each item, and in S1-3c the judgT~ent i3 carr~cd out whether the acquisition stat~ is in the validity standard by thi~ comparison result.

For instance, as to the automatic checking executing nu~ber, the acqulred ~tate l~ outing nun~r o~ 80. If the previous executing ~umber in the data stored in monitoring program module 50c i~ 79, due to the fact that l is increased ln ~his time, it is judged that the ~nspection i~ normally conducted. (In this respect, he~e it is a premise that a cycle in which monltoring program module 50c i8 sent out to carry out this execution is same as the cycle in which the protection controller execute~ t.h~ ~utomatic checkin~.) Further, it i9 judged whether it is the same automat~c checking executing number of ~nother cor troller which begin~ it~ operation at the ~ne t im~ .
The ~onitoring program module can recognize that in such a RECEIVED TIMENOV. 27. 7:$8P~.1 PRI'IT TlMEN5~i. 27 8:53PM

~ay the protection controller normally carrie~ out the automa~ic checking, and the automatic checking function normally functions.
Further, by judging whether ~he electrical quantity acquired ~imilarly as described above is in the specified r~nge stored in the monitoring program module, or equalized at ~hree phases, the ~nitorin~ program module can recognize that the analog-digital conversion unit of the protection controlle~ is normal.
Further, if the r~lay operating state s~m~l~rly ac~uired is in accordance with the validity ~tandard (for example, it is judged a~ normal that the relay eleme~t is now operating which is opera~ed by the powe~ ~low, and ao on), it i~ determined as normal. If it doe~ not accord with the validit~ standard, the ~onitoring program module can ~ecognize that the protection controller i~ abnormal.
Fllrther, regardinq the abnormality content similarly acquired, it is compared with the validity standard (for example, whether another controller does not detect the ~ame f~ilurc) ~torod in the ~ni~orin~ program module. If the same failure is not generated in another controller, the monitoring program module can recognize ~hat there i~ an abnormality in ~che controlle~ itself which i6 in ob~ect a'c present.
For four validity ctandards, the~ are compared with the acq~ired data, respectively, in Sl-2c, and these compariso~
results are judged in S1-3c. Ir all the items are found in thc P~ECEliED TIMENOV. 27. 7:~8PM PP~INT TIMENOV. 27. 8:52PM

. CA 02223314 1997-12-02 validity standard~, that the execution result of th~s monitoring program module is good i~ added as a kno~ledge of thls ~nouitoring prog-am module in Sl-4c. Cor~cret~l y, it is added as one of the above data. Fur~her, if even one of the items is found out of the validity ~tandard, it is added as a knowledge o~ this ~on~toriny pro~ram module in 51-5c that t~e execution result of this monitoring progra~ ~odule is defective.
Finally the automatic checking executing number, the electrical quantlty, the relay operating state and ~e abnorm~l~ty contents acquired in S1-1c are added as a knowledqe of this ~onitorin~ program module in S1-8c. Concretely, they are added as a da~a of the mo~itoring program module. The monitoring program m~clul~ is executed by the procedure as abotre described, its execution res~lt is acquired, and the kno~ledge i~ added to the monitoring program module.
In thls ~cnowledge added, the ~utomatic ch~cking executi nq number, the abnormality content~, etc. are used also a~ the data of validity standards at the time this monitorin~ progra~
module is transferred to another controller. In such ~ w~y this monitorlng program module i~ transferred to each pro~ection con~roller, executed at the transfer destination and acquired the result to add the knowledge se~entially,.
The ~xecUt.ion res~llt executed a~ mentioned above (the result whether the monitoring result is good or not) and the monitoring program mod~le added by the knowledge are returned to ~ispl~y controlle~ 20 or transferr~ to another protection RE5EIVEG TIMENOV.~~7. ~:58PM PRINT ?iMENOV ~7 8:5~PM

CA 022233l4 l997-l2-02 controller 40 ~ria communication ~rk 30. Hereupon, as to whether the re~urn ~o dlsplay cor.troller 20 i~ rried out~ or whether the transfer to protection controller 40 18 carried out, the selection is possible by an instruction from an operator to the monitoring program module. That is to say, if the return is found each time the end of monitoring each protection controller in the display controller, an operator comes to kno~
more quickly the monitoring result.
On the ona hand, after being transferred to other controllers and ending the execution of the monitorin~ program module in all the con~rollers in object of the monitoring, if 1~ ls returrL~ finally ~co the diaplay eo~trollcr, it ia an advantage that an operator is enough with the display conflrmation of ~nly one time. Even in protection controller 40, the similar means to the above protectlon con~roller 10, that is to say, a monitoring program module receiving means 41c, knowledge addition mean~ 42c and a send~ng means 43c are pro~ided. Firs~ of all, the monitoring program module is r~ceived by m~nitoring ~rogram module receiving mean~ 41c, it is executed s~milarly and the knowledge is added as above described in knowledge addition means 42c, and the execution resul~ ~nd the p~ogr~m module are raturned to di~play controller 20 by sending means 43c, o~ further it is transferxed to another protection controller, and then ~he processing similar as descr i~ed ab~ve i8 carried out.

Hereupon i~ is possible th~t only the execution ~esult is RECEIVED TIMENOV.2~ j3Rlll PRINT TIMENOV 27. 8:52PM

returned to the display controller every time, and the monitoring program ~odule is transferred to another protect~on controller, by the designation of an operator~ he monltorlng r~sult and the monLtoring program module transferred between protectio~ controllers and returned back in such a way are recei~ed and displayed by recei~ng mea~ 22c and display means 2~e of di~play eontr~lar ~0. As the displaY, a list i~
displayed in display controller 20 composed of the monitoring result of each protection controller and contents (for example, automa~le checking e~eeuting number, th~ el~etrieal quant.ity, etc.) added by each protection controller as the ~nowledge of the ~onitori~g program module.

A definite example or eonstru~ ion o~ this en~bodiment is shown ln FIGVRE 4. Digital protection controller 10 i~
composed o~ analog-to-digital conversion unit 10-1, digital proce~sor 10-2, input~output interface 10-3 with external equipment~ ~uoh as a circuit beaker, etc. communication interface 10-4 to in~erface, communication network 30 wi~h this protection controller 10, and bus 10-5.
All urlits of 10-1 thro~l~h 10-q are connected to each other via bus 10-5. Here, the component elements other than communication interface 10-4 are the same as tho~e de~cribed for prior art a~ s~own iIl FIGURE 44. Thi6 in~ention differ~
from a conventional protection controller in that a part of the program module (the monitoring program ~odule in thi~
embodiment) i~ sent to RAM 2-2 ~ia communication i~torface 10-4 RE~EIiED Tl'dcN5~!./,. ~ SuPM PRINT TIMENOV 27. 8:52PM

~rom communication network 30 a~d processed as a program in digital proces~or 10-2.
'rhe present invention ~eatures that the monitori~ ro~
module i~ sent to R~M 2-2 via communication network 30 and transferred to a RAM of another protection controller, while in the conventional protection controller, program~ are fixedly ~ritten ~n ROM 2-3. Thi~ diqital proces~or 10-2 co~poses knowledge addition ~ean~ 12c, and a part of receiving ~ean~ llc and ~ending ~eans 13c.
Further, co~u~Lunication interface 10-4 1.~ rln~ of the featu~es of thi6 invention, and for instance, it connects an ethernet LAN wit~ protectlon controller 10 as shown in thi~
FIGURE; 4. Monllorlng prc~rd~n module receiving meane; llc and sending ~eans 13c are partially achieved by this communication interface 10-4.
According to thi~ embodime~t, the work for a patrol whi~h is con~entionally carrled out by an operator of protection controllers i8 carried out by substituting the monitoring program module. As a result, it becomes for any operator to go to cach ~ubctation for ~ patrol of each protect~on controller, and a sharp labor saving beco~es posslble. Furthermore, as lt is so con~tructed that the monitoring result and acquired data are added :j~quentially ~n th~ monitoring progr2m modul~, a remote operator is able to confirm by acquiring easily de~ails of monitor~ng contents. As a result, the operabil~ty can be iInproved .

BECEIVED TIMENOV. 27. 7:58PM PP.INT TIMENQl ~7 8:52PM

Further, in this embodiment, the program module ~t~elf, correspondi~g to the work which co~ventionally an operator ~or a patrol of protection controllers ~arries oUI, ls senL from the dis~lay controller to the protection controller ~ia the co~munication network, and exec~ted in the protection controller. The commu~ic~tion proced~re as shown in FIGUR~ 46 is o~itted, a trafflc on the communication network can be made little, and the reliability can there~y be improved.
Further, accordi~g to thls embodiment, the operation correspondillg to e~h demand and the work to carry ~ut the same ~ob against a plurality of protection controllers as conventionally are.not necessary, and an operator only ~ends out the snonitoring program nL~ule to th~ communic~tion n~twork.
The monitoring prograr~L module itself autonomously acquires the state in each protection controller, judges the acqulred result and adds it as knowledge, and then it tran~fers be~ween proteCtion con~roller~. ~ccordingly, no ir~struction or confirmation are required by one by one by an operator, and the wor~load of an operator can be red~ced. ~s a reRult, an electric power system prot.ection and cont~ol sy~te~ of high economical efficiency and reliability can be offered.
Eurther, in comparison with the automatic super~rising function mounted i~l the con~entional protectior~ contr~ller, the monitoring program module described in thi~ embodiment becomes the ~tyle to compare the states of a plurality of protection controller~. Accordingly, in comparlson wit~l ~he con~rent~onal ~1 .

~ECE I VED T l.!~lENr ;. ~ 7 7: 58PM PR I ~IT T IME~19V. 27. 8: 52PM

automatic ~uper~i~ing function, the monitoring with h~gh accuracy and in a ~ide range can be realized according to this eu~odiment .
FIGUR~ 19 i~ a block diagram showing the construction of a part of an electric power system protection and control sy~tem accordirYg to a seventh emb~diment of thi~ in~ention. FIGUE~E 19 show3 the con~igurat~on of monitoring program module 50c ~ent out from di~play controller 20 to the pro~ection controller~, and transfers between protection controllers. A~ sho~n ir~
FIGURE 19, it ic characterized in that it is pro~rided with a moving route control means 5lc and an abnor~ality detection means 52c. ~y this, it comes to be possible to carry out the mo~;t ~uit~blc~ n-ovin~ rnll~e control of the monitoring progra~
module corresponding to the state of the protection controller.
The concrete operation is explained by employing a ~loWchart isl FIG~E 20. In FIGURE Z0, slnce Qt~p~ c through S1-6c are knowledge addition means alrea~y indicated in ~he seventh embodiment, the explanation thereo~ is omitted. .

Among these, step~ Sl-Zc and Sl-3c ~ ro~pond to ~~bnorm~lity detection means 52c o~ this embodiment. The jud~ent is carried out in 51-2c and S1-3c whe~her the acquired data i~ 51~

lc are in the val~dity standard, and in case tha~ the controller ~n ob~ect is judged as normal, the moving route is set to the next protection controller by S2-lc.

The monitoring program mod~le is sent out to the following otectio~ controller by sending m~ans 13c ~hown in the sixth P~ECEIVED Tll.IENGV 27~ 7:5.~rll PRINT TIMENOV 21. 8:52PM

embodiment according to the mo~ing route ~et. In case that it is ~udged a~ an abnormal in S1-3c, the moving route is se~ in the display controller by s2-2e. ~y thi~3, the mo~itoring program module is returned to display controller 20 by sending means 13c. The control of the above mo~ing rou~e is realized in the monitoring program module.
The state of transfer of the monltoring program module in case the moving route is controlled ~ such a way is ~hown in FIGUR~ 21(a). In FIGURE 21(a), the monitoring program module ~ent from di~play contr~l ~er 20 transfers along dotted lines ~n the figure. Here in case tha~ a protection controller A ~s normal, it is transferred to a next protection controller B.
~ere il~ case th~t ~n a~normal~ty o~ the protect.ion controller is detected by a~ove s~eps Sl-2c and S1-3c, a rou~e ("a") is ~elected by 52-2c, and the ~onitoring program module is returned to di~play controller ~o. I~ d~ e th~t the protect~on controller i5 normal, a path ~"b") is selected by S2-lc, and the monitoring program module i~ transferred to a next protection con~roller C.
Acc~ding to ~his embodiment, it has bee~ designed so that a moving route may be changed by the state of ~he protection controller by providing means for controlling a mo~ing route i~
che rnonitoring progra~ module. F~y this, in case that an abnormality occurs in the controller, the monitoring program module is immediately re~urned to the display controller.
~ccordingly, i~ comes to be pos~ible that ~ oporator can RECEIvED TiMENOY. 27. 7:5~P'.1 PRINT Tl~,IENOY 27. 8:52PM

quickly restore the controller by these contents, and the a~ailability of th~ protection controller can be i~pro~ed.
As a modificatlon of the ~vellth embodiment, whe~ the protection controller is abnormal, after acquiring the state of the related protect~on controller, the ~onitoring program module controls a moving path so a~ to return ~o display controller 20. This state i~ shown in F~GU~E 21(b). As ghown in FIGURE 21(b), in case t~at protection controller A is nor~al and protection controller B is abnormal, the moving rou~e i~
tra~sferred to a prot~ctian c~ntroller D related to Protection controller B. After the state of protection controller D is acquired, the ~onitoring program ~odule return~ to di~play con-r~ller 20.
It i~ assumed that protection controllers B and D are connected to ~he same tranSmi~ion line. In this caYe, a~ the electrical quantity ls not lncluded in ~h~ ~t~n~ard v~lue in protection controller B, related protection controller D also acquires the electrical quantity. By this, in ca~e that there are the similar abnormalities ln the electrical quantity in ~he two ~tection co~trollers B, D, the probability that an abnor~ality i~ in the transmission line i~self comes to be higher. In this case, by the fact that an operato~ obtains such informatio~, it is possil~l~ t.-~ ~specify the defective portion quickly. Further, there is no need to stop the protection controller unnecessarily, resulting in enabling to improve t~e a~allabili~y.

R~

RECEIVED TlMENOi. 27. :58PM PRINT TIMENOV. 27 8:52PII

By cha~glng a moving route automatically to the related controller in ~uch a way, ~n oper~tor can acqui~c quickly the necessary infor~ation. In this respect, this ~unction can ~e realized by changing step S2-2c of F;GURE 20 to the "setting the moving route to the related controller". Here what controller 1~ a related co~trolle~ can be reallzed by adding the name of the related controller to the data in sending out the monitoring progra~ module from the display controller.
Accordinq to the abo~e embodiment, as it is made that ~he moving route can be controlled by the state of the protection controller, the monitoring result and the detailed information can bc quicl~.ly known, th~ restor~tion of the control 1 ~r i~
accelerated, and the reliability can be improved. Eurther, by adding the data of the related controller to the monitoring progra~u module and carrying out the mo~ring rout~ control by the state of the protection controller along wlth these data, the state of the related controller can be efficiently collected.
Further, by this, speclfying a ~ailure portion can be implemented qu~ckly, and the improvement of the reliability can be realized.
FIGURE 22 is a block diagram showing the construction of an electri~ power system protection and control system according to an eighth embodiment of thi~ invention. In FIGURE
22, 10 and 40 are digital type ~rotection controllers, 20 is diapl~y controllcr, and 30 i~ communication network. These are of the simiiar configuration to the above embodiment, and the RECEIVED TiMENOV.2,. 7:5&PM PRINT TIMENOV.27. 8:51.~M

detailed explanation is o~itted. In this embodiment, a specific purpose indication means 24c ~ ~rovided in dlsplay controller 20. ~y t~is, a speci~ urpose i~ g~en i~ dicplay controller 20 to a ~pecific purpo~e data collection program module 50c which trans~er~ between a plurality of pro~ection controllers.
Speclfic pur~ose data collection program module 50c to ~hich the sp~ci~ic purpose is given is provided with a data collection mean~ S4c to carry out the data collection in a~cordance with the ~p~ific ~urpose and a comParison ~eans S3c to carry out the comparison st~ti~tic~ procss6ing on the ~ame ~tem of the ~ata of the plurality of protection controllers.
In the above ~ixth ~nd seventh embodiment3, th~y are constructed such that all items corre~ponding to the con~entional work for a patrol are included ~n the monitoring program module which transfers between protection controllers.
I~ t.hi~ case, when there are many items which should execute on each contro~ler and the number of protection controller~ to go round is ~any, much time ~s required until the monitorlng program ~od~lle will be returned to the display controller.
According to the style of operation of the protection controller, there are many cases that are good wlth only the monltori~-~ of ~pecific itams. Therellp~n, this embodi~ent aims to provide an operator quickly with the state of a plurality of protection controllers whi~h the operator wish to obtain, by configuring as above. For i~l~tance, in c~ce that ~ach ~E~EIVED TIMENOV 27 7:5~,M P~.INT TIMENOV.27. 8:51PM

protec~ion controller compares the electrical quantitie~
fetched rLom the electric power syste~ and it i5 dc61red to know the deterioration ~tate of an analog-to-dig~ tal conver~ion unit of each co~troller, the specific purpose of "Electrical quantity data collection" by the d~splay controller 1~ glven to the specific purpose data collection program module.
The program module to which the specific purpo~e i8 given is transferred to protection controller 10, and collects di~it.~l data which is obtalned by analog conver5ion of the electri~al quantity that is the output of the analog-digital conversion unit.

Si~ilarly~ thc electrical q~ant~ty data of each ~ro~.~ction controller i~ collected. After collection, by comparison means 53c installed in this program ~odule 50c, electrical quantitie~

o~ the ~ame item ~L-~: compared with e~ch other with rcepect to the root mean ~quare value and the phace, and the statics processin~ like its difference, di~persion, mean value calculation, etc. is carried out. This result ic di~played ln d~play controller 20.

The above operatio~ i~ shown by a flowchart in FIGUR~ 23.

FIGURE 23 is a figure to show the flow in case the electrical quantity is col~ect.ed by the s~ecific purPose data collection program ~odule. ~irst, whe~her all controllers in ob~ect are done for a patrol by S3-lc, and in case it does not end, the mo~Li~oriL~g progr~m ~odule it~elf i~ t~ansferr~d ~o th~ next controller by S3-2c. The electrical quantity data of the P~EOEIVED TIWENri.27. 7:58rlYI PRINT TIMENO'i.27. 8:5lPM

controller transferred by S3-~c i~ collected. After then, it returns to S3-lc. The~e steps are repeated until the data collectlon reldted to ~ ol~trollers in object are ~ini8hed, When the patrol of all controllers in object ends, the comparative ~tatistical processing of collected data is carried out in S3-4c, and lt en~s by tra~ferring the program module to the display controller in s3-sc. In display contro~ler 20, the above comparati~e stati~tical processing result is displayed.
In FIGURE 24, as an example of ~his, the root mean ~quare values ~n~ the phases of the currents of protection controllers and their mean ~alues and the dispersion ~alues thereof ~rom the mean values with statistic processing are shown, respecti~ely.
By d~splaying the result made with the comparative statistical processing along ~ th the data collected from each controller as desc~ ibed ~bove, thc deterioration of ~n analog-to-digital conversion unit, etc. can be known at higher accuracy. In the abo~e embodiment, the electrlcal quantity is explained as an instance, but ~he present inv~ntion c~n be applied as to a variety of contents like other data, for instance, the aUtomatic checking executing nu~ber, relay operat~ng state, state of a transmission sys~em ~or protectio~
and control, e~c.
Ac~ord~ng to this embodiment, since the specific purpose ls given to the pro~ram module, and it is designed to carry out the compPrati~e a~atiOEtical processing by going around ~his RECEI'v'ED TlME~lO'v. 2,. , 5&P~1 PRINT TIMENOl, 21. 8:5~PM

program module between related protection controllers, information required by an operator can be effectively obtained.
As a result, protection controllers of hiyh operability and economical efficiency can be offered.
In the above embodiment, t~e comparative statistical means is provided within the program module to transrer among ~
pro~oction ~ontroller~. But, the effect i~ same even though it is provided within the display ~ontroller ~o a~ to acquire the collected data from the program module in which the data collection is endcd. Further, ~n the above embodiment, it i8 so constructed that the specific p~lrpo~e is given to the specific purpose data collection program module. ~ut, even though a productior~ m~ar~s to produce every tim~ th~ program module itself by the specif ~ c purpo~e is installed in the display controller, its effect is equal.
FIGURE 25 is a block diagram ~o s~ow L~ construction of ~n electric power system protection and control sy~te~
according to a ninth embodiTnent of this invention. In FIGURE
25, 10 is digital t~pe protection controller to carry Out t2-e protection and c~ntrol of electric power system 1 making status quantity S1 from electric power system 1 in object of protection and control as an ihput and making protectlon and control ouL~ut C1 to elcctric power sy~t~m 1 as an o~tPUt. It is composed of moni~oring program module receiving means llc, knowledge addition mean~ 12c, sending mean~ 13c, a d~agno~tic program module receiVlng ~nea~l~ 14c, ~nd an exccutlon mc~ans~

~9 P~ECElvED TIMENQ-'i. 2 7. 7:58PM PRINT TIMENOV 27. 8:51PM

Further, display controller 20 carrie6 out the re~ote operation of digital type protec~ion controller 10 via communica~ion network 30. It ;.~ pro~ided with monitoring program modu~e sendinq means 21c, and a diagnostic program module sending means 25c. Monitoring program ~odule 50c and a diagnostlc p~ogram module 60c are program module~ sen~ from the display controller, received by the protection controller, and executed therein.
Here monitoring progra~L module receiviny means llc~
kno~ledge add~tion mean~ 12c, sending means 13c, monitoring program module ~end~ng ~eans 21c, and monitoring program module 50c have been explained already in the six~h e~bodlment, the detailed ~xplanation is omi~ted. The characteristic of this embodiment is in the configuration to handle the diagno~tic program module, and ~ts operation is explained belo~.
In cs3e it i~ judg~d th~t thPre i~ an occurrence o~
abnormality of protection controller 10 or an o~en of occurrence thereof by the monitoring p~o~ram module as explained in t~e slxth em~odiment, it ~9 not~ fied from the mo~itoring program module to diagnostic progr3m module sending means 25c ln display controller 20. When diagnostic program module ~ending means 25c i~ notified, dlagnos~lc progr~m module 60c is transferred to protection controller 10 ~ia c~mmunication network 30. In protection controller 10, th~s diagnostic program module 60c ~s received by diagnostic program module ~ec~ivln~ ~aan~ 14c, and executed by execution means 15c.

RECEliED TIMENOV.27. 7:58~M PRINT TIMENOV. 27. 8:51PM

In the monitoring program module as described formerly, the sta~ of each controller is detee~ed and the exi~t~nce of an abnormality can be judged, but which portion i~ bad cannot be specified. For instance, in case that the electrical quantity is not a~ appropriate ~alue, it can be ~upposed a~
fa~l~re of analog-digital conversion unit. But any portion of an A/D converter, multip~exer, ~ample hold ~ircuit and ~ilter in the analog-digital con~ersion unit cannot be ~pecified.
A protection controller incorporating a diagnostic rule in advance ac a technique for ~uch diagnostic has been offered ~Japanese Patent Application No. Hei-6-3362~0). By thi~, for inst~ncc, if all eloctrlcal quan~.~ti~ are abnormal, it can be supposed as a failure of an ~/D converter or a m~ltiplexer wh~ch are the common portions. ~he program module including cuch a dlagnos~i~ rule is ~ di~gnostic progr~m module, which dia~noses by obtaining a variety of information at the time of abnormality occurrence from the monitoring program module, and specifies the failure part. The reCult ls no~lrled to an operator. By this, for a~ operator, the replacement of a failure part come2 to be possible quickly.
Con~entionally, such a diaqnostic function has been incorpor~ted in each controller in a style of ROM. Ho~ever, accompanied by the complicity and high functionality of protection controllers, i~ ic in a trend that the diagno~tic L~llcti~n be~ome~ eomplicated, rasulting th2 increase ;n the required memory. Further, in ca~e the diagnostlc rule is RECEIVED TIMENQV.27 ,:5.~PM PRINT TIMENOV 27. 8:51PM

CA 022233l4 l997-l2-02 further made o~ high func~ionality by reflecting a ~arlety of diagno-~tic results, ~ince a diagnostic function i8 ~tored in ar~
ROM conventionally, it is necessary to ~vp the controller ~nd replace an ROM. As a result, there is a proble~ ln the point of availability of the controller.
According to this embodi~ent, the diagnoctic f~nctlon 1~
transf~rred from the display controller only to a controller in which an abnormality is recognized by the monitoring program module, and is executed without stationing the diagnostic ~u~lction ~ y~ ln each prot~ti~n controller. ~ccordingly, exces~ive equipment of hardware resources like memory of each protection controller, etc. comes not to be neeessary, and proteCtion controllers of h~ghly ecor~omical effici.~ncy can be offered.
Further, in cace the change in diagnostic rule or the highly f~nctional implementation ~hereoL i~ carried out, since t.he diagnosis is executed by sending a d~agnostic program module to RAM of protection controller, the stop of the controller is required, with the result that a protection co~troller of high availability can be offered. Further, as to the diagnostic program module, similarly to the monitori~g program ~odule, the ~ending it ~o a plurality of controllers is also pos-~ible. The diagnostic rule.~ AS to a plurality of controllers (for example, when a pl~rality of controllerc detect abnormalities ~n the electrical quantitie~, it diagnoses that all controllers are soun~ ~nd th~t therc are failure ~2 RECE I VE~ dEIIQl. ~7. 7: 58PM PR I NT T IIIENOV. 27. 8: 5 1 PM

factors at the electric power sy~te~ side) can be applied, with the re~ult Ihat th~ diagno~i~ of high accuracy and cpecifying quic~ly a failure part come to be pos~ible.
FIGURE 26 is a block diagram showing ~he construction of an electric power system protection and control ~y~tem according to a tenth embodiment of this invention. In FIGURE
26, lO is digital type protection controller to carry out the protection and control of electric power system 1 making statu~
~ua~tity Sl from electric power system 1 in object o~ the protection and control as an input, In addition to FIGURE 25, in thi~ embodiment, it is charac~erized in that a restoration proyram module recc~ing m~ans 16c ~n~ An execution means 17c are installed. A program storage unit 70c ~upplies a restorat~on progra~ module 80c to digital type pro~ection controller l~ via communic~tion network 30, and i~ provided with a re6toration program module sending means 71c. In this re~pect, program storage unit 70c is realized by a work station or a personal computer.
~ s its operation, in the configuration shown in FIGURE 25, first in ca~e ~t is judged that there 18 an occurrence of abnor~ality of the controller or an omen of occurrence thereor by the monitoring pro~r~m m~dule, the diagnosis is carried out by the diagnostic program module, and a failure part is specified. ~ext, re~toration program module 80c corresponding to the railur~ part i~ 3ent, in order to conti nue the oPeration ~ithout stopping this controller, from program ~torage device ,~.ECEIVED TIMENOV. 27. 7:58PM PRINT TIMENOV. 27. 8:51P~l 70c. ~y receiving and executing it at ~che protection controller side, this protection controller shall be normally operatcd after the r~tor~t.ion.
For instance, lt is considered as to a failure part, by the diagnostlc program module in FIGUR~ 25, that only the ~pecifi~d filter in the nn-log-to-di~ital ~onver~i~n unit iq speclfied as a failure port~on. In this case, an operator continues its operation as a protection controller, by sending out restoration program module 80c ~alizing the protection and control proces~lng without using thi~ speci~ied filte~, ~esulting in not using the electrical guantity obtained from this de~ective filter.
Concretely, it is assumed that there are two filters inputting the ~ame system electrical quanti~ies, of different accuracy, and they are employed as the inputs of different relay element3, re6pectively. In ~.Ase a filter at the side of high accuracy became defective, a program of relay elements utilizing this filter is changed so as to use another filter of low accuracy which i~ ~ound in thi~ rclay element. For th-~purpose, a proqram module to carry out the relay operation for the re~toration is sent. Furt~er, for a different example, in case a clock realized by the hardware of t1L~ protectlon controller has became defective, a program module to realize t~e cloc~ ~unction by the software in place is sent out for re~toration purpose.
Ac~ord~ng to this embodiment, since it is deRigned so that RE~EIVED TIMEN5V. 27. 7:~3R?.1 FRINT TIMEN0~ 27. 8:51PM

the restoration program ~odule cor~espondlng to a failure part that can be speclfled by the diagnostic program module i~ sent ou~ from the program storage device, w~thout carrying out a hardware repl~cement in the failure part, it comes to be possibLe to cont~nue the opera~ion of the protection controller.
~8 a rerult, the ~va~ lability o~ the controller is not lowered, and a sharp labor saving of the restoration work of the controller i~ obtalned, thereby it is po~sible to provide an electr~c po~er 3ystcm protection and control systern c~f highly economical efficiency.
FIGURE ~7 is a block diagram showi~g the con~truction of a part of an electr~c power ~ysL~, protectior~ ~nd control 3y3t6m according to an eleventh embodiment of this inventlon. In FIGURE 27, 10 is digital type protection controller of the ~ame configuration shown in FIGURE 17, and monitor~ng program module 50c is sent via commun~cation ne~work 30~ The characteristic of this embodiment is to provide a control means 55c in monitoring program module 50c to input the history of working re3ult~ and op~3ratin~ re~ult.s of the protection controller, and to control the transfer cycle, stay time, processin~ contents and moving xoute of the monitoring program module itself.

~'IGUR~ 27 i~ a ~iagram ~howing th~t working results ~nd operatlng results are inp~t to monitoring program module 50c in digital type protection controller 10.

Conventionally, in many cases, a y;lLrvl, y~riodical inspection, etc. of a protection controller are determined fro~

RE~E11ED TIMENOi.2~ r~FM PRINT TIMENOV.2~. 8:50PM

the working time and operatlng result~ of the controller. That ls to say, ror the c~ntr~ller in which ~ ~pecificd time has not elap~ed after starting the operation of the controller, th~
inspection work is carried out, ~ince an initial failure of the hardware ln the.controller is ~oreseen. Fur~her, w~en an electric power system fault occurs and the protection fun~tion works normally in the protection controller, it i9 considered that there are operating results, ~n thi~ protection controller.
In thi.~ ca~e, since there is no anx1ety of the failure to operate and the protection function is also correct, there is a case in which the above inspection is omitted, or a case to omit ~ p~rt of a p~trol wor~. it~m.
Further, in case the abnor~ality, etc. occur in the controller and it is con~idered that there are problems also ln ~he controller operaLlon, there is ~ c~e to ~arry out a pa~rol work by shortening the regular patrol cycle. As described above, by the working state and operating results of the controller, an operator judges con~entionally to do a pa~ro~, etc. every time. In this ca~e, if the number of controllers in object i~ many, an operator ~udges these every time and carries out the inspection work, which results e~tremely complicated, ~nd the reliab~lity is a~ lowered.
In ~rder to solve these problems, this embodiment i~
configured to give the hysteresis of the working state and operaLl~y result~ to the monitoring program modulo, and to carry out therein the transfer and executlon adequate to this.

RECEIVED TlMENO'i. 27. 7:5~PM PP~INT T!MENOY. 27. 8:50PM

Concretely, the monitoring program module has a control table shown in FIGURE 28 in the control means 55c and referring to this, it determines the transfer cycLe, proce~ing contents, stay time and moving route.
A~ shown in FIG~RE 2~, in ca~e working results are little, the cycle for the monitor~ng program module of trans~erring and monitoring is shortened, the tay time i8 made longer ~or the enough in~pection, and monitored repeatedly. ~urther, for the controller with the operating results, the detailed mon~toring of electrical q,uantity, z~n~l relay o~eratin~ state confirmation, etc. is omitted. For the controller in which a~normality ha~
occurred, since there is a probability to occur an abnor~ality again, the ~oni~oring program ~odule is return~ to the dlsplay controller e~ery time of the ~onitoring, thereby an operator can confirm the details.
I~ this embodiment, as to the wo~iny time ~nd opcrating results, the ~alues which each protection controller has are given to the monitoring program module. But, in case all values of protection controllers are ga~hered in the dlsplay controller the values may be gi~en to the monitoring program module by the ~isplay controller.
As explained above, according to this embodiment, by the uRe ~f the working re~ults and o~ratin~ result~ of the protection co~troller, ~t becomes po~sible to adopt the monitoring style corresponding to these results. As a result, in ca~e versatile controll~rs exist and their hystere~ re RECEIVED TIMENOV. 27. 7:58PM PRINT TlMENOli. 27. 8:50PM

alco dif~erent, the most s~itable st~le o~ the monltoring as a whole can be realized. That is to say, ~ithout increasing the load oP communicatlon, the ~ime and contents nccessary for each controller ca~ be suppl~ed, and an electric power system protection and control system of excellent reliability, economlcal efficiency and response perrormance cun be offered.
Further, this in~ention is not limited to a~ electrlc power sy~tem only. But thi6 invention ls also applicable ~o a distributed control system composed o~ plural distrlbuted ~o~trolle~s to control e~uipments to be controlled by taking stat~s quantitie~ therefrom and a display controller connected to these distri~uted controllers ~ia a communication network to dlsplay and control for monitoring the oE~Pr~tlons and statu~ of distributed cont~ollers (or a program storage u~it to ctore a monitoring program ~odule that is c~pable of operating on the distributed controllers). In th~ ca-~e~ in the em~odime~t8 described above, the protection co~trollers should be read as the diRtributed controllers.

FIGURE 29 is a block diagra~ ~ho~ing an electric power system protection and co~trol system according to a twelft~
embodiment of thi~ invention. In FIGURE 29, 10 i~ digital protect~ on cont~oller which cArrie~ out the protection an~
control of electric power ~ystem 1 subjec~ to the protection and control ~y inputting status quantlty sl from ~lectric power system 1 and Inakiny the protection ~nd control OUt.p~l~ to RE~EIVE~ TlMENG'i.~~7 7:5aPM PRINT TIMENOV 27. 8:50PM

electric po~er ~ystem ~ as Cl. I~ is compo~ed of a ~etting program module receiv~ng mean~ lld, a knowledge addition mean~
12d and a sending means 13~.
Further, display controller 20 perform~ remote operation of plural controllers such a~ digital pro~ection controller 10, other controller 40 of the same configuLation, etc. via co~m~ni.cation network 30. It is pro~ided with a setting progra~ module sendlng means 21d, a receiving means 22d, and a display means 23d.
Aa it~ op~ration, first a settlng program T~odule 50d 1~
sent out via communication network 30 by settlng program module ~endin~ ~eans 21d is di~play controller 20. Setting program module 50d ill thi~ em~odiment ~ 9 a pro~ram module with a function to perform setting processing as above described, and the data and the description on the procedure ~o process the~
are incorporated thereln.
In the setting program module, the data are settlng ~alues correspondinq to each protection system, the procedure may be ~ald as the step to store t~ose setting values to ~he specified me~ory of ~ protection controller. In this regpect, to move between plural protection controllers, a moving route of ~etting program module i~ also included in the da~a.
Setting program ~odul~ ~ent is received ~y program ~odule receiv~ng means lld in digital protection controller 10 via communication networX 30, is executed by knowledge addition means 12d, and lt~ e~ec~ted r~Eult is add~d a~ knowledge RECEliED TIMENOY ~i. 7:58PI'II PRINT TIMENOY. 27. 8:50PM

therein. When summarizing up the flow of program 6ending, reception, knowledge addi~lon and execution processing in thi~
cas~, the flow will be shown in FIt~.1RE 30.
Since the setting program module ~ent out fro~ the display controller a~ shown here consi~ts of ~etting value data to be set and i~s procedure (for in~tancc, in ~hat mQmory the set value i~ stored, and to which processing in the protectlon controller a reque~t is -~ubmitted, and so on), the detailed processing ae to the setting processlng ln the prol;ectlon controller ~g performed.
In other words, the processing is performed aga~nst each hard-~rare resource in the protection controller like RAM, E~SP~OM
(New), EEPROM (Old), etc. A~ shown in FIGURE 30, ~ince the setting program module transferred in the protection controller performs proce~sing between ~arious hardware resources, such as R~M eLo. and other program~ in the protectt~n controller, it i~
enough that an operator glves the mo~ing route to the setting program module on the dicplay con~roller. Therefore, the request data and response da~a do not mutu~lly come and go, in a complicated ~ay on the communication net~ork as shown in ~IGU~E 47.
Conventionally~ such a communicatlon as sbown in FIGU~3 47 ~ performed between the display controller and the protection controller. In this embodi~ent, as the setting program module incorpoxating the processing of these i~ transferred to the protection contro~ ler .side and executed, the load o~ the RECEIVED TiMEl'iO; ~,i , 5~C,~,5 PRINT TIMENOV 2,. 8:5QPM

co~munication net~ork is reduced in comparison with the ~on~entional ~ystem. Furthex, it tg enough that an operator ollly gi~-e3 ~ new 3~ttin~ ~allle to the display controller, and an operation to ~end out each request to the protection controller as conventionally becomes not to be required.
AS the kno~ledge, whether 6etting is normally ~ompleted, what is a new setting value?, what are defective setting elements and setting ~alu~s in ca~e the setting is not co~npleted?, and whether there 1~ ot~L~r a~nc~rm~lity or rclay operation are treated, and the knowledge i3 added to se~ting program module 50d. In this respect, by adding an abnor~ality of the controller and relay operating state here as knowledye, whether the relation between the state where the controller~ is operated, -~uch as ~ystem state, etc. and the setting ~alue ls proper is possible to know indirectly.
C~ncretely, the above knowl P~ge is added ~s one of data in the settinq p~ogram module. It becomes ~uch a style that this setting program module is ~o~ed to each protection controller, executed at ttle destinaLion moved, the rc~ult is obtained, and further, knowledge i8 sequentially added, as described above.
The setting program module executed and added ~lth knowledge as described above i~ returned Lo display controller 20, or is tra~sferred to other protection controller 40 via the communication network by sending means 13d. Hereupon, whether it is returned to display controller 20 or trans~erred to other prot~ction control.1Gr 40~ 15 determined by the data desi~nating RE~EIVED TlMENOv. ~7 7:58rM PRINT TIMENOV. 27. 8:50PM

the above described moving route. T~e data of thls ~noving route ls gi~en to the setting program module by an operator who decides the controller need~d with the ~etti~g 6exvice.
After being transferred to ather controller, and the execution of the setting program module is finished in all the controller subj ect for the setting, ir lt i~ fi~lally returned to the display controller, there is an advantage that an operator i8 enough to confirm the displayed conten~s only once.
Here, protection control~er 40 is provided with the similar mean3 in protcction ccntroller 10, a setting program module recel~ing means 4ld, a knowledge addition ~ean~ 42d, and a sendlng ~eans 43d. In protecti~n controller 40, fir~t the settlng p ogram m~dule i~ re~eivod by setting pro~ram module receiving mean~ 41d, lt is executed and the knowledge i~ added as described above, and its execution res~lt and the setting progra~ module are returned to di~play controller 20, or transferred further to other protection controller by sending ~eans 43d. Then, the same proces~es follow as described aboye.
The setting program module transferred between pro-ecticn controller~ and returned as described above is recei~ed and di-~played by recei~ing ~eans 22d and display means 23d of display controller 20. As the display, the contents added as kLlowledg- of the setting pro9~ram mod~lle by the protection .
controller is displayed as a list (for instance, setting completion normally, ~et~ing abnormality, relay operation, etc.J.

~.02 REOEIVED TlMENO'i.~7. ~:53P.~d PRINT TIMENOV.27. 8 50PM

This ~ta~e is ~hown in FIGU~E 31. FIGURE 31 display~ in a comprehensible way to an operator the data which the setting program ~odule transrerred ~o tw~ transYer~c differe~tial protection relay unit~ for parallel linec pro~ided at both ends of a resistance grounding sy~tem parallel 2-circult transmission line and obtalned. ln the convenLi~nal system, ~ince i~ is made of picture display per each controller and each ite~, ~he confirmation ~ork is complicated.
In FIGURE 4 a concrete configuration of the embodimen~ of the prcsent inver~tion ;~ shown. Digital protection controller 10 is composed of analog-to-digital conver-cion unit 10-1, digital proce~sing unit 10-2, input/ou~put interface 10-3 to connec~ extern~l equipmcnt6 likQ breaker, etc. and communication interface 10-4 to perform the interface between comm~nication net~ork 30 and this protection controller 10, and bu~ 10-5.
In this respect, unit~ 10-1 through 10-4 are mutually connected via bus 10-5. Here, components other than 10-4 are the same as cor~ponents in FIGURE 44 described in the prior art.
But in ~iigital Processing unit 10-2 in the embo~iment, what is di~feren~ from the conventlonal protection controller i~ that a part of program (setting proqram module in this e~bodiment) is ~ent to RAM 2-2 via communiCatiOn inter~ace 10-4 from communication net~ork 30, and ~t is processed as a program in digital processing unit 10-2.
Conventionally, a program i9 fixedly written in P~OM 2-3.

~03 RECEIVED TIMENOV.2,. 7:58~M PRINT TIMENOV.27. 8:50PM

But it is a characteristic of the embod~ent of the present in~ention that setting program ~odule 50d i~ sent from communicatlon n~twork 30 to RAM 2-~, further, it is transfeIred to RAM of other co~troller. ~his digltal proce~sing unit 10-2 constitutes knowledge addition means 12d and a part of recei~ing means lld and se~ g me~n3 13d.
Further, communication interface 10-4 i~ one of the charaCteristicS o~ the embod~ment of the present inventlon and, ~or example as shown in ~his FIGUR~, 11 per~orms the connection betw~en the ethernet LAN and the protection controller. A part of the ~etting progra~ module receiving means lld and sending ~eans 13 i8 realized by thi~ communication inter~ace 10-4.
In othcr words, thR ~ettlng program module from co~munication network 30 is received here in communication network 10-4, and tran~ferred to above ~AM 2-2. Further, the settlng program ~nvdule executed i~ di~ tal processing unit 10-2 is sent to comm~nication network 30 via t~is communlcation interface 10-4, and it i5 transferred to di~play controller 20 or other protection controller. Tlle abo~e i~ ~ concrote ~.onfiguration of an electric power system protection and control sy~tem according to the twelfth embodiment of this invention.
~ rther, a~ an examPle of communication network 30, it is composed of a net~ork connecting protection controllers in a local range cuch as substation by an ethernet LA~, a network connecting per~onal computer~ and work station~ in attended ~ECEI~ED TI~IENOV. 27. 7:58PI,1 PRINT TIMENOV. 27. 8:50~i~

cubSta~ion and a wide area network conne~ing bo~h the networks in a wide area, a~ shown in FIGU~E 4.
J;n Ihls re3p~ct, the configu~atlon of an ethern~t LAN i~
general, and its explanation is omitted. Further, a8 a wide area network, ~witchlng networks, such as telephone circuits etc. are used.
Display controller 20 is realized by a personal computer in this FIGURE. setting program module ~ending means 21d i~
realized by an lnterface circuit between t~e software ln a personal computer and the ethernet I~N.
According to this embodiment, 8ince the setting work con~entionally performed by an operator can be realized, i~
~ubstitution, ~y the sett.ing program module. As it becomes not neces~ary for an operation to go to each 8ub~tation for the ~ettlng work, a sharp labor saving i~ made po~ible. Further, since ~t is made th~t various re3ult d~ta a~ to the sett~.n~
work can be ~eq~entially added to the ~etting program module, a distant operator can acquire and ccnfirm easily details of the setting result. As a result, ~he operabllity ~:an be ~nproved.
Further, the setting program module itself correspondin~
to the 5etting work conventionally pexformed by an operator of the protection controller is sent from the dl8play controller to the protection controller vla the communication network, and executed in the protection controller. As a re~ult, the communication proced~xe shown in FIGURE 47 can be neglected, and th~ tra~fic on the communicati~n network can be made a RE~EI~EG Tii~llENO~ PM PRINT TIMENGi.2l. 8 49PM

little. Accordingly the reliability 1~ i~p~oved.
Further, con~rentionally, the operation corre:3ptJnding to each rP.quest and the wor}c to per~orm the same opera'cion against plural controllers have been necessary. But in this e~bodiment, those works become unnecessary. An operator only ~ends the ~etting program module t~ the communication network. The setting program module i~self autonomo~sly perform-~ the setting processing in each protection controller, collects the result and related da-~, and mo~e9 bctween prot~ction controllers adding them as knowledge. A~ a result, the designation and conflrmation by an operator one by one is no~ required, and a workload of an operator can be reduce~. Accordingly, ~n electric power system protection and control sy~tem of highly economical efficiency and reliability can be offered.

Further, the setting re~ult of each protection controller ca~ b~ refle~ed to the 6etting program ~odule. Th~ state whexe a ne~ setting ~alue is not proper for the controller can be quickly known (for example, a relay work~ unnece~sarily, or an a~norm~lity i_ generat~d in ~ ~ontroller). As a result, it becomes possible that the ~etting program module controls a moving route by itself, and communlcates the re~ult to an operato~, re~ultlng in ~Ot gi~ring UnpropCr 6etting value~ t~
plural protection controller~. In such a way, even though a moving route is controlled from the setting result, its effect is equal to the above embodimen~.
FIGURE 32 is a block diagram showin~ the construction of ~ECEIVED Tl',IENOV.27. 7:58PI~M PRINT TIMENOV.27. 8:~PM

an electric power ~y~tem protection and control sy3tem accordlng to a thirteenth embodiment of this invention. In ~IGURL 32, t~e ~unfigur~tion of ~etting program modul~ S~d moving between protectlon controlle~s is indicated. Further, in digltal protection controller 10 an input mean~ 14d is provided to give system electrlcal qu~ntity inform~tion, oyetem information, and related equipment information to this setting program module 50d.

A moving route control means 51d controls a moving route of setting program module 50d, and performs re~ision of the mo~ing route based on the sy~tem electrical quantity information, the system informat~on, and the related equipment informstion of each controlle~ at the mo-~ing destination.
Further, a ~etting value determination means 52d determines a setting ~alue to be changed ~imilarly from the infon~ation obtained from lnput m~n~ 14d. ~y thi3, it is made pos~ible tn perform an optimum mo~ing route control o~ the setting pro~ram module corre~ponding to the system electr~cal quantity information, the systen- informatlon, and tIle related eq~ipment information of the protection controller, and it i~ made possible to perform the operation of the protection controller in the optimum setting value, Conve~tlonally, for ~etting of a protection controller an operator determines a setting value taking into account a state of an electric power system, ~unctions of a protection controller, ~nd ~n in3tallation ~t~te there~f etc., and then RECEl'iED Tl'MrNO'J. 27. 7:5&PM PRINT TIMENOV. ~/7. 8:49PM

the operator perfor~s the ~etting ~ork. Howe~er, acco~panied with increase in demand of the electric power syStem in these years, a trend or gig~ntic implemcntation and complication in a sYste~ have been progressed, Conventionally, ~he ~ystem conditions are considered fixedly, and ~t ha-c been made di~ficult to determine a ~etting value, in taking thc worst ,st~e into consideration. For instance, lf a setting value i8 made of a lo~ sensitivity in taking the worst ,~ystem condltions in account too much, a problem is produced that an acciden~ can not bc d~sti~gui,~hed, and the protection controller can not operate at the time when performing the protection and control i8 requlred.
Agair~-t ~ch ~ probl~a~, i~ rec~nt year~, a concept of adaptive relays has been propo3ed. Thl~ is, the protective relay is provided with functions a~tomaticaLly adjusting the opera~ng charac~eristlc, s~tting ,nd ~t~te o~ the prot~ctive relay corresponding to the change in conditions of the electr~c power system. It is detailed in the 1994 National Meeting of The Institute of the Eleetrical ~ngineers of Japan, ~cturcd Th~ses .~15-1, etc. By the addit~on of such a functio~, e~en though how the sy~tem 3tate ls changed, lt becomes more possible that a protective relay surely distingulshes t~e exlstence of th~a ~ault.
The concept d~agram of an adapti~e relay i,s shown in FIGURE 33. In FIGURE 33 info~matio~ directly input from the electric power ~y-tem to the protectiv~ r~lay is the sy~tem 1~8 RECEIVED TlMENOi. 2~. 7:58PM PRINT TIMENOV. 27. 8:49PM

electrical qua~tity infor~ation, system information, and related e~uipment information, such as ~oltage and current of the ~ystem and activ~/reacti~e powcr induced th~refrom, conditions of breaker and disconnecting switch, etc. The protec~ive relay unit ident~fies a system fault based on these infor~ations, and outputs a trlp co~uand ~f bre~ker to the ~ystem side.
In the conventlonal protective relay, the characteristic, setting ~alue, control sequence, etc. of the protec~lve rel~y ha~e been fixe~ ~o those set in advance. But in adaptive relays, they have become variable corresponding to the i~put of the data from the system, as illustrated. As an example of the application of ~d3pti~e relays, FIGURE 34(A) shows the ca~e in ~hich the distance measuring characteristic of the dlctance relay at a terminal A is influenced by the magnitude of branch c~rrent from a termlnal 3, in a 3-terminal tra~smis~ion line, for a fault ~hich occurred f~rther than the branch point.
Conventionally, a relay performs the setting s~ch that the protectlon section as the proper protec~lon sectl~n when the branch current from ter~inal B i~ zero. In case the branch current from terminal B flows in, the protecti~e relay decldes it as out of sec~ion (called a~ the under-reach phenomenon).
This error bcco~es large in proportion to the magnitude of branch current. Originally, even though the system state changes and the current value from terminal ~ changes at the ti~ne of a rault, it i~ de~irable to measU~ the distance RR CEIVED TIMENOV. ". 7:5DPM PRINT TIMENOV. 27. 8:49PM

correctly of the fault section.
~ o avoid this, in the adaptive relays as sho~n in FIGURE
34~A~, neces~ary in~ormatio~ tr~n~mitted toward a protectlve relay of terminal A from the pro~ective relay installed in terminal B. For instance, the connec~ion state o~ the rear power supply of terminal B at t~e time or occurre~ f ~ f~ult is tran~mitted in advance, and the setting of the di~tance relay of terminal A ~s ad~usted by suppo~ing the rear impedance of terminal ~.
Or el~e, th~ ~agnit~e of the current at terminal B i~
transmitted to the protective relay at terminal A, and the measuri~g impedance operatlon is correctly performed by making the current ~urther th~n thc: branch po~nt aE; ~h~ synthesis value of the currents at both terminals. At any rate, by taking the information at term~ nal ~ into the relay at terminal A, the change in branch e~fect rrom Lermi~al ~3 ~ccompan~ed with the change in ~ystem ~s reflected, and the ~easuring impedance accuracy of a distance relay at terminal A can be i~pro~ed.
~ s a configuration in ca~e cuch adaptive relays are realizad in th~ prior art, it becomes the form as shown in FIGURE 34(B). In the protective relay at terminal B, an information acquisition proce~s~ng unit to take the informatlon (the ~ranch current and the conne~.t.ic~n state of the rear power ~upply) of the system to terminal B and a communication processing un~t to perform communication with terminal A are installed. Fur~her, i~ tlle protect~ve relay at termina~ A, a ~ 10 P~ECEIVED TlMENOv.21 7:58PM PRINT TIMENOV 21. 8:49PM

communication proces~ing unit to ~end out and receive the info~mation to and from terminal B, a setting pro~es~iny unit to dctermine ~n optirnum ~ettinçr value by mak~ng the system information of it~ o~n terminal and this information from terminal B a~ it5 input~, and a ~ault deci~ion processing unit to perform the correct d~stanc~ metsurement ~rom the setting ~alue obtained from the setting proce8sing unlt are installed, If an adaptive relay determlnes the setting value f~om the 5ystem informat~ on at lt~ ~wn termin~ t i6 good with the configuration sho~n in FIGURE 33. But in a case ~hown in FIGU~E 34, the information of other ~ubstation becomes al80 necessary. Considering that the system become~ ntic ~nd co~plex, for adaptive relays the communication and utilization of information between protective relays installed in the electric ~tations in a wlde range become indi~pensably a maln 8 t~eam.
Ho~e~er, as de~cribed above in the conventional technique, a configuration of the protective relay which acquires the system inrorma~lon, communic~tes with protec~e relay~ in other electric station, deter~ines lts setting value to an optim~m value becomes complicated and of a large scale. Thi~
cau~es the drop in economical effi~ ency and rel~a~ility.
FT~URE 34(B) is of configuration to ~tllize the information from termi~al B at terminal A. But conversely there is also a case to send information ~rom termlnal A to t~e relay aL
terminal ~, and t.he confis~uration i~ compllcated further. In RE~EIV ~) TIMENOV. 21. ,:58P~ll PRlNT TIMENOV. 27. 8:~9PM

case that there are prov~ded N terminal6, and N is large, it becomes complicated further.
~ 'IGURE 35 is a block diagram to realize the adaPti~e f~nction described abo~e in this em~odime~t. The setting program module provided with the moving route control mean6 and the ~etting value determlna-lol~ me~n-~ otay6 in tho protect.ive relay of terminal B, and move~ to term~nal ~ by the moving route control means, by the change in the system electr~cal quantity lnformation because of an occurrence o~ a sy~tem f~ult.
Her~, v~rious ~ystem information and sy~tem electrical quantity ~ nformation of terminal B have been taken into the setting value determination means in this setting pro~ram module. ~l~o in t~rminal ~ of the mo~ing destination, ~imilarly various sy~te~ information and system electrical q~antity information of terminal A are similarly takYn in the ~tting ~al~e detex~lnatioLI me~n~. ;Thcn by mcans o~ ~he abo~e procedure fo~nd in the setting value determination means (By supposing the rear impedance of terminal B, the setting ~al~e o~ the distance relay of terminal A ls adju~ted. Or ~lse, by making the current further than the branch point a~ the synthesis value of the c~rrent~ at both terminal~, the distance measurement operation i~ correctly performed. ~, the ~e~ing v~luc ic changed t.o the optimum value, or the current value being an operating quantity of the distance relay ls ad~usted.
~In other word~, as the operating quantity of the di~tance relay, the ourrent value from t~r~inal B is added to the RErEIVED Tl~,~ENIDV.~l. 7:58PM PRINT T!~EN~V.27. 8:49P,~

current ~alue of ~ts own terminal).
In the setting value determir.ation ~ean6 de~cribed in this e~nbodiment the de~ermlnation o~ thc setti~g val tle as 50-called ~en~ltivity of the relay characteristic in included. In addition, the selection of what is used a~ the operating quantity as de~cribed above (here, th~ ~eleetion to add th~

curront o~ terminal ~ when there is a branch), the ad~ustment, further the ~hange of the character~tic, the se~uence control select~on and change, a~e i~cluded in the ~etting wo~k in a wld~ me~ning. Accordi~gly, these are also a ~ub~ect to the de~ermination by this setting value de~ermlnation ~eans.

The s~tting value or operating quantity (current ~alue) deter~ined by the ~bo~e ~etting v~lue determination mean~ ic gi~en to the fault decision process~ng unit. By this, the diatance relay operation of ~erminal ~ is performed, and a trlp comman~ i~ given to a breaker.
To realize the configuration descri~ed above, other than the faul~ decision processing unit, it i~3 enough if there I~3 provided one setting progra~ module. ~he ~eL~ing progra~
module, accomp~nied with the occurrence of a ~y~te~ fault, collects the necescary data by it~elf and ls transferred, and the value necessary ~or the fault decision of set~ng value, etc. and ~dling 3re d~term;ned. Accordingly, in this embodiment, it become~ not necessary to provide many complicsted processing un~t3 in each protective relay, a3 shown in FIGURE 34 (B) .

RECEIVED TIMENOV.27. 7~ '1 PRINT TIMENOV 2,. 8:49P~

Fuxther, since the linking and communlcation betwee~
individual processing units ha~e not be required, but capsulated ~n ~his en~odiment, there is no ~e~eration of trouble, and it is preferable on the reliablli~y. In particular, in ~any cases, it is enough that 8uch an adaptive function is operated in case o~ the ~ccurronce of a 6y~te~
fault or the change in system conditions. To store ~any proCesBing units for such procecsing6 in the protective relay unit, ~hen no~ using, requires the unnecessary hardware re:~ource, r~sulting in worsening economical efficiency. But in this embodiment, while sett~ng program module is ~oved, th~
necessary processing ~s performed. Accordingly, an extre~ely hlgh ec~nomic~l ef~iciency i9 ~hleved. Further, this embodiment is in the case of 2 te~minals, but in case of many terminals, its effect beco~es to be more distinguished.
According ~o tnls em~diment, by ln6talling the movin~
route control means and ~ett~ng value determination means in the setting progra~ ~odule, the protection controller can be realized ~hich is able to operate in an adap~Lve w~y to thc change i n ~ystem conditions, and change in system electrical quantity. Further, since the configuration and processing ~n this ca6e can be simplified, when real~zing the adaptiVe rel~y Lunct~ on by communicating each other the informations between ~any protection controllers in particular, an electrical power syste~ protection and control syste~ of high economical efficiency and ~ig~l reli~billty can be offered.

RECEIVED Tll,IENOV.27. 7:$8PM PRINT TIMENOV.27. 8:48PM

CA 022233l4 l997-l2-02 FIGUR~ 36 is a block diagra~ showing the constr~c~ion of an electric power system protectlon and control sy~te~
according to a fourt~ent.h embodi~ent of thls invention. In FIGURE 36, cetting program ~odule 50 ls provided with moving route control means Sld a~ described in FIGURE 32. Further, protectlon conl:roller lo i3 provided with input mean.~ 14d as described in FIGURE 32.
The characteristics o~ this embodiment is to install a protection and control operatlon de~rmlnation me~n~ 53d to deter~ine a protection and control operation program module to be used by this information ~rom input means 14d. Further, a protection and control operation program ~odule storage unlt 60d to ~.ore the protection and control operation progra~
~odule i~ provided. Further, a protection and control operation progra~ module necessary for each protection cor~troller i~ called out and ~xec.ukQd by a prote~tion and control operation execution ~eans 15d installed in protection controller 10. In ehis re~pect, the concrete configuration of thi~ embodiment ~s ~l~til~r to th~ 3hcwn in FIGURE 4, and protection and control operation program module storage unit 60d employs such hardware a~ a workstation, and a personal computer, etc.
For the adaptive func~ion to automatically ad~ust the characteristic and setting corresponding to the change in the conditions of the electric power sy~tem has been descri~ed in t~e embodiment deseribed above, and ~uch an adaptive function P.ECEIVEG TIMENOV.27. 7:58PM P~INT TIMENOV.27. 8:4~PM

is that the setting proce~sing unit acts again~t the protection and control operation (for instance, the processing of the fa~lt decision unit shown in FIGURE~ ~, 34 and 35 provided in ad~ance in the protecti~e relay unit. Therefore, according to the adaptive relay con~entionally propo~ed, t~e fundamental configuration for the protectl~rL ~nd control operation processing itself is ~xed in advanee.
However, accompanied with the gigantlc implementation and co~plex implementation of the sy~te~, ~he protec~lon and control operat~on processing is installed in a fixed way in advance by considering all of these has a limit, even though the setting processing corresponds adaptively to the sy3tern condi~lon. Further, that al ~ the Drocessings thinkable in advance are taken in a fixed way, is to have many functions not used in the protective relay, which ii3 not preferable economically.
This e~bodi~nent offer~ a configuration to solve this proble~, and it becomes possible that only ~he optimum protection and control operatlon requl~ed every time~ by being adaptive to the change in the condition.~ of the electric power system, can be d~ stributed to each protective relay uni~.
Below, this embodiment is explained by showing a c~ncrete example. E'IGURE 37 sh~w~ high-resistance grounding system.
parallel 2-circuit transmls~i~n lines. In such the h~gh-reRistance grounding system parallel 2-circuit transmission line~, it ls ~nown ~hQt by the ~urrent inducted from the other P.ECEIVED TlMENC'i. ~~7 7:5~P'il PRINT TIMENOV. 27. 8:48PM

circuit a zero-phase-sequence circ~lating current is always produced, and influences the earth-~ault ~ran~verse differential protec~lon relay grounded ~t both ~Qrminals of the c~rcuit at the ti~e of occ~rrence of a sy~tem fault, a~d there are bad influences like a fail.ure to opera~ce of a healthy circuit, etc.
A~ this measure, Lt is a general practice that by making a change component o~ the zero-phase-sequence at the po~ nt of occurre~ce of a fault as the operating quant~ty, ~he maunitude of c~nge of trans~er~e differential protection relay that can perfo~m the protection at high ~ensi~ivity is applied to a system in which the zero-phase-sequence circulating cu~rent is large. Such ~ rel~y i3 al60 called one of adaptive relays.
In FIGURE 37, an example of the operation o~ the protective relay i~ thi~ case i~ explai~ed. In FIGURE 37(a), ln a system of a large zero-ph~-~e-~equent circulating ~.urrent, ~ a fault occurs very near at terminal A of a parallel 2-circuit ~o. 1 line, first, terminal A is cut off by a change component type circui~ selective relay ~50AGJ or ~ermlnal A in F~GURE 37 (b) . since the zero-phase-seque~ce circulatin~

current does not circulate at this point of time, terminal B

can be c~t off by a si~ple earth-fault transverse di~rerentlal protec~ion relay (5~G) 8s shown in FIGURE 37(c).

Shown in FIGuRE 38 is the protection and control 3equence to realize such an operation. Here the operation as abo~e de~cribed ls reallzed by the com~ination of an e~rth-fault RECEI; u TIMENOV. 27. 7:58~ PRINT TIMENOV. 27. ~:48PM

overvoltage relay (64) and the above 2 relay elements (50~G, 50G). ~ere, 50LT and SOGT are timers ~o coordina~e the relay operations of b~t~ ~erm~nals..By theae the ~eq~ential ~ut-off can be performed, for ter~inal A by change component ~ype circuit selective relay ~50~G), and ~or terminal B ~i~ple earth-fault circuit selective relay (50G).
In the ~.onventional relay unit as described above, it i5 necessary to take in advance a change co~ponent type circuit selectlve ~elay (50~G) in the protective relay unit, in the sy tem where n zero-pha~e-~equence circulating current is found.

Howe~er, t~e magnitude of zero-phase-sequence circulating current~ is largely influenced by the state of other trans~nission llne framing ir~ a comb~ ned way ~nd the magnitude o~ the power flow. Therefore, there is a possibili'cy that thiQ
relay i~ applied to the ~ystem where the protection is not required, or conversely the normal pr~tection cannot be performed even though there arise~ a need for protection du~ing operation, but this relay i5 not applied to the system where the protection is required. This has a problem in term~ of economical Qffic;~ncy and reliability.
~ ccord~ng to this embodiment, this problem i~ solved. A~
shown in ~IGURE 36, the magnitu~e of zero-phase-sequence circulatlng c:urrent of the sy6tem 1.~ found by lnPut mean~ l4d.
8y th~s, by protection and co~rol operation determination means 53d ln setting program module, due to the fact that the zero-pha~e-sequence clrculatin~ current of th~ magnltllde larger 11~
BECEI~/ED TIMENOV.27. 7:58PM PRINT TIMENOV.27. 8:48PM

than a pre~crl~ed ~alue continued to flo~, from protection and control operation program module storage unit 60d, a pro~ec~lon and control operation program module of change component type circuit selective relay ( SOAG) i~ called, and i~ executed by protection operation execution mean~ lSd. Concretely, this p~og~am module l5 stored in tho R ~5 in the pro~ective relay unit, ln the CPu thls is called as the code, and executed.
In quch a way, only ~hen a need arise~, the protection and control operatlon progr~u~ module i~ c~llled and u6~d.
Accordingly the useless hardware resource i3 not used alway-~, and the optimum protect~on and control ~ystem corresponding to the conditions of the syste~ can be realized.
Further, in case both terminals in FIGUR~ 3~ abo~e described are cut off by di~ferent relay element~, as ~hown in FUGURE 39 the movlng route control mean6 of the ~etting program module func~ions as f~llow~.
First, setting program ~odule calls out the program module of change component type circult sel~ctl~e rel~y (SOAG) from pro~ectlon arL~ control operation program module storaga unit 60d by the occurrence of a system fault, which i5 then executed by relay unit A. In the meantime, the setting program module is mo~re~ to relay unit ~, and ~udge~ Lh~t the succ~eed$ng cut-off ls required from the knowledge obtained by terminal ~ a;nd the ~ystem condition. Then, setting program module calls circu~t selecti~e relay (50G) program module and cu~ ofr tar~ninal R. In such a way, by moving route control means ir~ the ~ECEIVED TIMENOi. 27. 7:58,~ PBINT TIMENOV.27. 8:q8P.M

setting program module, it is moved to terminal B by the change in the ~ystem conditlon, that is the cut-off of terminal A, and nece~ary program ~odule can be ex~cuted.
As shown in FIGUR~ 39 the function always staying in the protective relays at both ~erminals is one setting program module, and ~he fa~lt decision uniL )~ecome~ not to bo re~uired a~ways. In particlllar, in spite of the fact that the relay elemen~s required at both terminals are different, respectively as shown in FIGURE 38, in the prior art tne completely sa~e rel~y clem~nts had to be mounted at both termlnals.
However, according to thiC embodi~snt, by recognizing the change in the syste~ ~tate occurring at each ter~inal, the settln~ progr~m module moves. The o~timum protection and control operation program module can be provlded and executed in each protective relay. By this, an electric power system protection and control sy~tem o~ high econo~ical e~ficiency and reliability can be offered. In this re~pe'ct, in the above e~bodiment it is referred only to the operation of relay elements. sut this embodlment 18 al80 applled to the aeq~c~ce control operation, of such as the logic and tlmer processlng, etc. and the similar effe~t can be expected.
Further, ~his invention i~ not limited to an el~ctrlc po~er 6y~tem only. But this invention is also applicable to a distribu~ed control sy~tem composed of plural distr~buted controllers to control equipments to be controlled ~y taking status q~antltle~ therefrom and a display controller connected RECEIVED TI~ENOV.27. 7:58PM PRINT TIMENOV 27. 8:48P~

to the8e di5tr~bu~ed controllers via a communication ~etwork to diQplay and control for monitoring the operationC a~d status Or di~tributed coLltrollors (or a program storage unit to store a setting program module that ls capable of operating on the distributed controllers). In this case, in the embodiments described above, t~e proLection co~trollers should be ~ead as the distrib~ted controller~.

Further, this invention is not li~lted to an ele ~ rLc pow~r sy~tem only. But thi~ ~nven~ion is also applicable to a distributed control system composed of plural distributed controllers to control equipments to be controlled ~y taklng ~t~tus quantities therefrom and a display controller connected to these dlstributed controllers via a communication network to display and control for monitoring the operations and status of distribu~ce~ controller~ ~or ~ progra~ ~tor~ge UAit to store program modules that are capable of operating on the d~stributed controllers). In this ca~e, in the embodiments de~cribed above, the pro~ection controller~ ~hould be re~d a~
the distributed controllers.
In essence, this invention can ~e applied to a ~ystem composed of a plurality of units, each for oper~Ling an equipment whlch i .~ the ob~ ect to be operated by inputting a ~tatus quantity of the equipment, and a display controller connecte~ to each of the units via a co~munication network ror dlsplayln~ and controlling an operation and status of each of RECEIVED TI~IENOV.27. 7 ~r~ PRINT TIMENOV. 27. 8:48PM

the units for monitoring ~or a pro~ram storage unit for storing a program module which can be operated in the units).
In addltlon, t~i~ inYention can also he applied to a program storing mediu~ readable by a computer, tangibly embodying a program of instructions executable by the computer to perform ~ethod s~eps as de~ribed ~bove for a mon~ tor and control system, an electric power cystem protection and control ~ystem or a distributed control ~ystem.

Accordi ng to this invention, it is possible ~o provlde an electric power system protection and control syste~ composed of a plurality of protection controllers and a d~play controller connected v~ a a communication network which is excellent in the operability, economical efficiency, maintainability and reliab~lity, without increasing the load of the co~ n~catlo~ net~ork, by utilizing the ~ACt that the protection controllers are connected to the co~munication networ~ and paying attention to the mo~ement of a program .
module and the cooperation functlons am~ng prot~ction ~ontrollers ~n the system.
According to thi~ invention, it is also pos~ible to provide an electric power syctem protection and control ~y~tem compo~ed o~ a pl~lr~lity of protect~on controllers and a display controller connected ~ia a communicatlon network which is excellent in the operability, econo~ical efflciency, ~ain~alnability ~nd rcliabillty, by eliminating the operation RECEIVED TIMEIIO','. 27. 1:S~PM PRINT TIMENOV. 27. 8:48PM

analyzlng work which is conventionally-performed and withot~t lncreasing the load of the communlcation networ~, by utlli~iny the f~ct that the protPc~ion controller~ are connected to the com~u~ication network and paying attention to the move~ent of an opera~lon analyzing program module.
Accordlng t~ thi ~ n~entio~, it ig furt.her possible to provide an electr~c power system protection snd control system composed of a plurality of protection controllers and a dl6play controller connecte~ via a communicati~n network whlch it2 excell~tnt in the operability, economical efficienc~, maintainability and reliability, by eliminating the work for a patrol whlch is conventionally performed ~1thout ic~creasing the load of the communication network, by utilizing the fact that the protection cont~oller~ are connected to the co~m-lnication ~etwork and paying attention to the movemen~ of a monitorlng program module and thQ coo~ration functions t~mong protection con~rollers in the system.
According to this inventlon, it i8 Qtill po~ible to provide an electric p~wer ~ystem protaction and ~ontrol 8y5tem co~posed of a plurality of protection ~ontrollers and a di~tplay controller connected via a com~unication network which is excellent in the operability, economic:~l ef ficiency, m~inta~nabili~y and reliability, by eliminating the setting work which is conventionally performed, extending further the range of the setti~g function, optimizing t~e se~lng value and the protec~io~ an~ control characteristics qulckly and ~ECEIVED Tl'.IENOV. 2,~. 7:58Pt,l P~INT Tl!dENO'v 27. 8:48 anonymously corre~ponding to the change in the electriC power system, without increasing the load o f the comm~l~ication networ~, by u~iliz~ng thc fact that the protection controllers are connected to the communication n~twork and paying at~ention to the movement of a setting program ~odule.

According to thi~ inven~ion, it ~-~ po8sible to provide a distributed control sy8tenL compo~ed o~ a plurality of di8tributed controller~ and a dicpl~y controlle~ connocted ~ia a communi ~ion ne~ork which is excellent in the operability, econo~ical efficiency, maintaina~ility and reliability wlthout increasing the load of the communication network, by utllizlng tlle f~ct that th~ di~tributed controller~ are connected to the communication network and paying attention to the movement of a program ~odule and the cooperation ~unctions 8mong di8tribu~ed controllers ln the system.
According to thi~ invention, it is also possible to pro~ide a distrib~ted control sy~tem co~posed of a plurality o~
distxibuted controllers and a d'splay c~ntroLler connect~d via a co~ ication networ~ which is excellent in the operability, economical efficiency, maintainabillty and reliability, by eliminating the operation analyzin~ ~ork whicn ls eor~ventionally performed and without increasing the load of the communication network, by utilizing the ~act that the distributed controllers are connected to the communicat~on net~ork an~ paying attention to th~ movement of an oper8tion PE~EIVED TIMENCIV. 2 7. 7:58PM PRINT TIMENOV. 27. 8:47PM

analyzing program nnodllle.
Accc~r~liny to this invontion, i~ ic furth~r possible to provide a distributed control system composed of a pl~rality of distrib~ted controllers and a display controller connected via a communication network whl~ c~llent in t~e oper-~biLity, economical efficiency, maintainability and reliability, by eliminating the work for a patrol which is con~entionally performed, without increas~ng the load of the c~rl~nlcati~l network, by utillzing the fact that the distributed controllers are connec~ed to the communication network and paying attention to the movement of a monltoring program module and the cooperat~ on ~urlctions amon9 d1stributed controllers in the system.
According to this inventlon, it i~ still possible to provide a di~ uted control 3y~tcm composcd of a plur~lity Stlll a further object of this in~ention is to provide a distributed control system composed of a plurality of distributed controllers and a display contr~ller connected vi~
a communication network which is excellent in the operability, economical efficiency, maintainability and reliability, by eliminating the ~etting work ~hich is con~entionally perrormed~
cxtending further the range o~ the setting function, optimizing the ~ettlng value and the distr$buted control c~aracteri~tic~

quickly and anonymo~qly corresponding to the change in the elecL r iC p~wer syatcm, withou~ in~reA~ing the load of the communication network, by utilizing the ~act that the RECE[-;E~ TIMENOi. 27. 7:5~PM PRINT TIMENOV. 21. 3:47P.'~

distributed controllers are connected to the co~munication network and paying ~ttention to the movement of Q ~ctt~ng ~rogram module.

Ob~iously, nu~erou~ modifications and variatio~s Or the pre~ent in~cnti.on are ~os6ible ln light of the above teaching6.
It ls therefore to be understood that within the ~cope of the appended claims, the invention may be practiced otherwise than aR ~pecificcllly dcecrlbod herein.

P.ECE I VED T IÇIEIIGV. 27. 7: 58PM PR I NT T IMENOV 27. 8: 47PM

Claims (42)

1. A monitor and control system, comprising:
a plurality of processing units, each configured to at least one of monitor and control an equipment by inputting a status quantity of said equipment; and a display controller connected to each of said plurality of processing units via a communication network and configured to at least one of display a status and control an operation of each of said plurality of processing units, wherein said display controller being provided with a program module sending means for sending a program module to each of said plurality of processing units via said communication network, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of processing units, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of processing units, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of processing units and compare said status parameter to a validity standard, and each of said plurality of processing units being provided with a program module receiving means for receiving said program module from at least one of said display controller and another one of said plurality of processing units, an executing means far executing a received program module, and a transfer means for transferring an execution result by at least one of said executing means and said program module to at least one of said display controller and at least one of said plurality of processing units via said communication network.

2. An electric power system protection and control system comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with a program module sending means for sending a program module to one of said plurality of protection controllers via said communication network, respectively, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of protection controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of protection controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of protection controllers and compare said status parameter to a validity standard, and each of said plurality of protection controllers being provided with a program module receiving means for receiving said program module from at least one of said display controller and another one of said plurality of protection controllers via said communication network, an execution means for executing a received program module, and a transfer means for transferring an execution result by at least one of said execution means and said program module to at least one of said display controller and at least one of said plurality of protection controllers via said communication network.

3. An electric power system protection and control system, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with an operation analyzing program module sending means for sending said operation analyzing program module for analyzing an operation of at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, and each of said plurality of protection controllers being provided with, an operation analyzing program module receiving means for receiving said operation analyzing program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, a knowledge adding means for executing a received operation analyzing program module and for giving an execution result as a knowledge of said operation analyzing program module, and a sending means for sending said operation analyzing program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of protection controllers via said communication network; and said display controller being further provided with, a receiving means for receiving said operation analyzing program module after being added with said knowledge sent from at least one of said plurality of protection controllers, and a display means for displaying a received result in said receiving means.

4. The electric power system protection and control system according to claim 3:
wherein each of said protection controller is further provided with, operation information inputting means for giving an operation information to said operation analyzing program module moving among said protection controllers, and controller information inputting means for giving a controller information as to what range of said electric power system is made an object for protection and control by one of said protection controllers, respectively; and wherein said operation analyzing program module is provided with, moving route information inputting means for inputting an information to control a moving route autonomously upon receipt of said operation information and said controller information, and moving route control means for correcting said moving route based on said operation information and said controller information of one of said protection controllers of moving destination, respectively.

5. The electric power system protection and control system according to claim 3, further comprising:
an operating state prediction knowledge base which stores an operating state when a system fault occurs;
wherein said operation analyzing program module is provided with verifying means for verifying validity of an operation of one of said protection controllers by comparing said operation information collected by said operation analyzing program module with said operation sate prediction knowledge base, respectively.

6. The electric power system protection and control system according to claim 3, further comprising:
a plurality of system observation units, each for taking and accumulating electrical quantity from said electric power system;
wherein said operation analyzing program module is provided with, moving route control means for correcting a moving route based on an operation information collected by said operation analyzing program module moving among said protection controllers which may be related to a system fault of said electric power system, and verifying means for verifying validity of an operation of one of said protection controllers by comparing said operation information collected by said operation analyzing program module with said electrical quantity collected by said operation analyzing program module from one of said system observation units based on a result of said moving route control means.

7. An electric power system protection and control system, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with a monitoring program module sending means for sending said monitoring program module for monitoring a status of at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, and each of said plurality of protection controllers being provided with a monitoring program module receiving means for receiving said monitoring program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, a knowledge adding means for executing a received monitoring program module and for giving an execution result as a knowledge of said monitoring program module, and a sending means for sending said monitoring program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of protection controllers via said communication network; and said display controller being further provided with a receiving means for receiving said monitoring program module after being added with said knowledge sent from at least one of said plurality of protection controllers, and a display means for displaying a received result in said receiving means.

8. The electric power system protection and control system according to claim 7:
wherein said monitoring program module is provided with, abnormality detection means for detecting an abnormality of one of said protection controllers, respectively, and moving route control means for controlling a moving route of said monitoring program based on an output of said abnormality detection means.

9. The electric power system protection and control system according to claim 7:
wherein specific purpose data collection program module is provided as said monitoring program module;

wherein said display controller is provided with specific purpose indication means for giving a specific purpose to said specific purpose data collection program module;
and wherein said specific purpose data collection program module is provided with, data collection means for collecting data in one of said protection controllers in accordance with said specific purpose, and comparison means for carrying out comparison statistics processing on the same item of said collected data of one of said protection controllers.

10. The electric power system protection and control system according to claim 7, further comprising:
diagnostic program module for diagnosing one of said protection controllers in detail and for specifying a failure part in one of said protection controllers, in which said monitoring program module judges that there is an occurrence of abnormality or an omen of and occurrence of abnormality;
wherein said display controller is provided with diagnostic program module sending means for sending out said diagnostic program module to one of said protection controllers via said communication network; and wherein each of said protection controllers is provided with, diagnostic program module receiving means for receiving said diagnostic program module, and execution means for executing said diagnostic program module.

11. The electric power system protection and control system according to claim 10, further comprising:
program storage means for storing a repair program module for repairing one of said protection controller in order to continue the operation of one of said protection controllers, respectively;
wherein said program storage means is provided with repair program module sending means for sending out said repair program module corresponding to said failure part to one of said protection controllers via said communication network in order to continue the operation of one of said protection controllers after said failure part is specified by said diagnostic program module; and wherein each of said protection controllers is further provided with, repair program module receiving means for receiving said repair program module, and execution means for executing said repair program module.

12. The electric power system protection and control system according to claim 7, wherein:
said monitoring program module is provided with control means for controlling a transfer cycle, stay time in one of said protection controllers, processing contents and moving route of said monitoring program in accordance with working results and operating results of one of said protection controllers.

13. An electric power system protection and control system, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with a setting program module sending means for sending said setting program module for setting at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, and each of said plurality of protection controllers being provided with a setting program module receiving means for receiving said setting program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, a knowledge adding means for executing a received setting program module and for giving an execution result as a knowledge of said setting program module, and a sending means for sending said setting program module after being added with said knowledge to at least one of said display controller and another one of said plurality of protection controllers via said communication network; and said display controller being further provided with a receiving means for receiving said setting program module after being added with said knowledge sent from at least one of said plurality of protection controllers, and a display means for displaying a received result in said receiving means.

14. The electric power system protection and control system according to claim 13:
wherein each of said protection controller is further provided with input means for inputting, in each of said protection controller, system electrical quantity information, system information, and related equipment information to said setting module moving among said protection controllers; and wherein said setting program module is provided with, moving route control means for controlling a moving route autonomously, and setting value determination means for determining a setting value to be changed.

15. The electric power system protection and control system according to claim 13, further comprising:
protection and control operation program storage means for storing a protection and control operation program module which can be called out from said setting module moving among said protection controllers;
wherein said setting program module is provided with, moving route control means for controlling a moving route autonomously, and protection and control operation determination means for determining said protection and control operation program module necessary for one of said protection controllers and for calling out said determined protection and control operation program module from said protection and control operation program module storage means; and wherein each of said protection controller is further provided with, input means for inputting, in each of said protection controller, system electrical quantity information, system information, and related equipment information to said setting module moving among said protection controllers, and protection and control operation executing means for executing said determined protection and control operation program module collected by said protection and control operation determination means.

16. A distributed control system, comprising:
a plurality of distributed controllers, each for controlling an equipment to be controlled by inputting a status quantity of said equipment and for by converting said status quantity into digital data; and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of distributed controllers, wherein said display controller being provided with a program module sending means for sending a program module to one of said plurality of distributed controllers via said communication network, respectively, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of distributed controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of distributed controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of distributed controllers and compare said status parameter to a validity standard, and each of said plurality of distributed controllers being provided with a program module receiving means for receiving said program module from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network, an execution means for executing a received program module, and a transfer means for transferring an execution result by at least one of said execution means and said program module to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network.

17. A distributed control system, comprising:

a plurality of distributed controllers, each for controlling an equipment to be controlled by inputting a status quantity of said equipment and by converting said status quantity into digital data; and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of distributed controllers, wherein said display controller being provided with an operation analyzing program module sending means for sending said operation analyzing program module for analyzing an operation of at least one of said plurality of distributed controllers to at least one of said plurality of distributed controllers via said communication network, respectively, and each of said plurality of distributed controllers being provided with an operation analyzing program module receiving means for receiving said operation analyzing program module from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network, a knowledge adding means for executing a received operation analyzing program module and for giving an execution result as a knowledge of said operation analyzing program module, and a sending means for sending said operation analyzing program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network; and said display controller being further provided with, a receiving means for receiving said operation analyzing program module after being added with said knowledge sent from at least one of said plurality of distributed controllers, and a display means for displaying a received result in said receiving means.

18. A distributed control system, comprising:
a plurality of distributed controllers, each for controlling an equipment to be controlled by inputting a status quantity of said equipment and by converting said status quantity into digital data; and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of distributed controllers, wherein said display controller being provided with a monitoring program module sending means for sending said monitoring program module for monitoring a status of at least one of said plurality of distributed controllers to at least one of said plurality of distributed controllers via said communication network, respectively, and each of said plurality of distributed controllers being provided with a monitoring program module receiving means for receiving said monitoring program module from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network, a knowledge adding means for executing a received monitoring program module and for giving an execution result as a knowledge of said monitoring program module, and a sending means for sending said monitoring program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network; and said display controller being further provided with a receiving means for receiving said monitoring program module after being added with said knowledge sent from at least one of said plurality of distributed controllers, and a display means for displaying a received result in said receiving means.

19. A distributed control system, comprising:
a plurality of distributed controllers, each for controlling an equipment to be controlled by inputting a status quantity of said equipment and by converting said status quantity into digital data; and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of distributed controllers, wherein said display controller being provided with a setting program module sending means for sending said setting program module for setting at least one of said plurality of distributed controllers to at least one of said plurality of distributed controllers via said communication network, respectively, and each of said plurality of distributed controllers being provided with a setting program module receiving means for receiving said setting program module from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network, a knowledge adding means for executing said a received setting program module and for giving an execution result as a knowledge of said setting program module, and a sending means for sending said setting program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network; and said display controller being further provided with, a receiving means for receiving said setting program module after being added with said knowledge sent from at least one of said plurality of distributed controllers, and a display means for displaying a received result in said receiving means.

20. A monitor and control device, comprising:
a plurality of processing units, each configured to at least one of monitor and control an equipment by inputting a status quantity of said equipment; and a display controller connected to each of said plurality of processing units via a communication network and configured to at least one of display a status and control an operation of each of said plurality of processing units, wherein said display controller being provided with a program module sending unit for sending a program module to each of said plurality of processing units via said communication network, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of processing units, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of processing units, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of processing units and compare said status parameter to a validity standard, and each of said plurality of processing units being provided with a program module receiving unit for receiving said program module from at least one of said display controller and another one of said plurality of processing units, an executing unit for executing a received program module, and a transfer unit for transferring an execution result by at least one of said executing unit and said program module to at least one of said display controller and at least one of said plurality of processing units via said communication network.

21. An electric power system protection and control device, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with a program module sending unit for sending a program module to one of said plurality of protection controllers via said communication network, respectively, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of protection controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of protection controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of protection controllers and compare said status parameter to a validity standard, and each of said plurality of protection controllers being provided with a program module receiving unit for receiving said program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, an execution unit for executing a received program module, and a transfer unit for transferring an execution result by at least one of said execution unit and said program module to at least one of said display controller and at least one of said plurality of protection controllers via said communication network.

22. An electric power system protection and control device, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with an operation analyzing program module sending unit for sending said operation analyzing program module for analyzing an operation of at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, and each of said plurality of protection controllers being provided with an operation analyzing program module receiving unit for receiving said operation analyzing program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, a knowledge adding unit for executing a received operation analyzing program module and for giving an execution result as a knowledge of said operation analyzing program module, and a sending unit for sending said operation analyzing program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of protection controllers via said communication network; and said display controller being further provided with a receiving unit for receiving said operation analyzing program module after being added with said knowledge sent from at least one of said plurality of protection controllers, and a display unit for displaying a received result in said receiving unit.

23. An electric power system protection and control device, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with a monitoring program module sending unit for sending said monitoring program module for monitoring a status of at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, and each of said plurality of protection controllers being provided with a monitoring program module receiving unit for receiving said monitoring program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, a knowledge adding unit for executing a received monitoring program module and for giving an execution result as a knowledge of said monitoring program module, and a sending unit for sending said monitoring program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of protection controllers via said communication network; and said display controller being further provided with, a receiving unit for receiving said monitoring program module after being added with said knowledge sent from at least one of said plurality of protection controllers, and a display unit for displaying a received result in said receiving unit.

24. An electric power system protection and control device, comprising:
a plurality of protection controllers, each configured to protect and control an electric power system by inputting a status quantity of said electric power system and by converting said status quantity into digital data; and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers, wherein said display controller being provided with a setting program module sending unit for sending said setting program module for setting at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, and each of said plurality of protection controllers being provided with a setting program module receiving unit for receiving said setting program module from at least one of said display controller and at least one of said plurality of protection controllers via said communication network, a knowledge adding unit for executing a received setting program module and for giving an execution result as a knowledge of said setting program module, and a sending unit for sending said setting program module after being added with said knowledge to at least one of said display controller and at least one of said plurality of protection controllers via said communication network; and said display controller being further provided with, a receiving unit for receiving said setting program module after being added with said knowledge sent from at least one of said plurality of protection controllers, and a display unit for displaying a received result in said receiving unit.

25. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a monitor and control system, including a plurality of processing units, each configured to perform at least one of monitoring and controlling an equipment by inputting a status quantity of said equipment, and a display controller connected to each of said plurality of processing units via a communication network and configured to at least one of display a status and control an operation of each of said plurality of processing units, said method steps comprising:
receiving a program module corresponding to contents for display control in said display controller from said at least one of display controller and at least one of said plurality of processing units, at at least one of said processing units, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of processing units, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of processing units, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of processing units and compare said status parameter to a validity standard;
executing a received program module, at at least one of said processing units;
and transferring at least one of an execution result by said execution step and said program module stored in at least one of said plurality of processing unit to at least one of said display controller and another one of said processing units via said communication network, at at least one of said plurality of processing units.

26. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a monitor and control system, including a plurality of processing units, each configured to perform at least one of monitoring and controlling an equipment by inputting a status quantity of said equipment, and a display controller connected to each of said plurality of processing units via a communication network and configured to at least one of display a status and control an operation of each of said plurality of processing units for monitoring, said method steps comprising:
sending a program module corresponding to contents for display control in said display controller to each of said plurality of processing units via said communication network, at said display controller, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of processing units, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of processing units, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of processing units and compare said status parameter to a validity standard.

27. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers for monitoring, said method steps comprising:
receiving a program module corresponding to contents for display control in said display controller from at least one of said display controller and at least one of said plurality of protection controllers via said communication network at at least one of said protection controllers, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of protection controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of protection controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of protection controllers and compare said status parameter to a validity standard, executing a received program module at at least one of said protection controllers; and transferring at least one of an execution result by said executing step and said program module stored in said plurality of protection controller to at least one of said display controller and at least one of said plurality of protection controllers via said communication network from at least one of said plurality of protection controllers.

28. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers for monitoring, said method steps comprising:
sending a program module corresponding to contents for display control in said display controller to at least one of said plurality of protection controllers via said communication network, at said display controller, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of protection controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of protection controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of protection controllers and compare said status parameter to a validity standard.

29. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to at least one of display a status and control an operation of each of said plurality of protection controllers for monitoring, said method steps comprising:

sending an operation analyzing program module for analyzing an operation of at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, respectively, at said display controller; and receiving at said display controller an operation analyzing program module after addition of knowledge thereto sent from at least one of said plurality of protection controllers.

30. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute at least one of protection and control of an electric power system by inputting a status quantity of said electric power system and to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to display a status and control an operation of each of said plurality of protection controllers for monitoring, said method steps comprising:
receiving an operation analyzing program module for analyzing an operation of at least one of said plurality of protection controllers from at least one of said display controller and at least one of said plurality of protection controllers via said communication network at at least one of said plurality of protection controllers;
executing a received operation analyzing program module and to give an execution result as a knowledge of said operation analyzing program module at at least one of said plurality of protection controllers; and sending said operation analyzing program module after addition of said knowledge thereto to at least one of said display controller and at least one of said plurality of protection controllers via said communication network at at least one of said plurality of protection controllers.

31. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to display a status and control an operation of each of said plurality of protection controllers, said method steps comprising:
sending a monitoring program module for monitoring a status of at least one of said plurality of protection controllers to at least one of said plurality of protection controllers via said communication network, at said display controller; and receiving said monitoring program module after addition thereto of a knowledge sent from at least one of said plurality of protection controllers, at said display controller.

32. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and configured to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network, configured to display a status and control an operation of each of said plurality of protection controllers, said method steps comprising:
receiving a monitoring program module for monitoring a status of at least one of said plurality of protection controllers from at least one of said display controller and another at least one of said plurality of protection controllers via said communication network at at least one of said plurality of protection controllers;
executing a received monitoring program module; and outputting an execution result as a knowledge of said monitoring program module at at least one of said plurality of protection controllers; and sending said monitoring program module after addition thereto of said knowledge to at least one of said display controller and at least one of said plurality of protection controllers via said communication network, at at least one of said plurality of protection controllers.

33. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to display a status and control an operation of each of said plurality of protection controllers, said method steps comprising:
sending a setting program module for setting at least one of said plurality of protection controllers to at least one of said plurality protection controllers via said communication network; and receiving, at said display controller, said setting program module after addition thereto of knowledge sent from at least one of said plurality of protection controllers.

34. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for an electric power system protection and control system including a plurality of protection controllers, each configured to execute protection and control of an electric power system by inputting a status quantity of said electric power system and to convert said status quantity into digital data, and a display controller connected to each of said plurality of protection controllers via a communication network and configured to display a status and control an operation of each of said plurality of protection controllers, said method steps comprising:
receiving a setting program module for setting at least one of said plurality of protection controllers from at least one of said display controller and at least one of said plurality of protection controllers via said communication network at at least one of said plurality of protection controllers;
executing a received setting program module and to give an execution result as a knowledge of said setting program module at least one of said plurality of protection controllers; and -148-~

sending said setting program module after addition of said knowledge thereto to at least one of said display controller and at least one of said plurality of protection controllers via said communication network at at least one of said plurality of protection controllers.

35. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed controls system including a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:
receiving a program module corresponding to contents for display control in said display controller from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of distribution controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of distribution controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of distribution controllers and compare said status parameter to a validity standard, executing a received program module at at least one of said plurality of distributed controllers; and transferring at least one of an execution result by said execution step and said program module stored in said plurality of distributed controllers to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers.

36. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system including a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said medium storing a program comprising the step of:
sending a program module corresponding to contents for display control in said display controller to at least one of said plurality of distributed controllers via a communication network, at said display controller, said program module including computer-readable instructions that when executed by a processor implements at least one of a setting mechanism configured to store a data value in a memory of at least one of said plurality of distribution controllers, an analyzing mechanism configured to acquire an operational status parameter of at least one of said plurality of distribution controllers, and a monitoring mechanism configured to acquire a status parameter from respective of at least one of said plurality of distribution controllers and compare said status parameter to a validity standard.

37. A storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system including a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:
sending an operation analyzing program module for analyzing an operation of one of said plurality of distributed controllers to at least one of said plurality of distributed controllers via said communication network, at said display controller; and receiving at said display controller said operation analyzing program module after addition thereto of a knowledge sent from one of said plurality of distributed controllers.

38. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system including a plurality of distributed controllers, each for controlling an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:
receiving an operation analyzing program module for analyzing an operation of at least one of said plurality of distributed controllers from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers;
executing a received operation analyzing program module; and outputting an execution result as a knowledge of said operation analyzing program module at at least one of said plurality of distributed controllers;
and sending said operation analyzing program module after addition thereto of said knowledge to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers.

39. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:

sending a monitoring program module for monitoring a status of at least one of said plurality of distributed controllers to at least one of said plurality of distributed controllers via said communication network, at said display controller, and receiving at said display controller said monitoring program module after addition thereto of a knowledge sent from at least one of said plurality of distributed controllers.

40. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system including a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:
receiving a monitoring program module for monitoring a status of at least one of said plurality of distributed controllers from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers;
executing said received monitoring program module;
outputting an execution result as a knowledge of said monitoring program module at at least one of said plurality of distributed controllers; and sending said monitoring program module after addition thereto of said knowledge to at least one of said display controller and [another] at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers.

41. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system including a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:
sending a setting program module for setting at least one of said plurality of distributed controllers to at least one of said plurality of distributed controllers via said communication network, respectively, and receiving said setting program module after addition thereto of a knowledge sent from at least one of said plurality of distributed controllers.

42. A program storing medium readable by a computer, tangibly embodying a program of instructions executable by said computer to perform method steps for a distributed control system including a plurality of distributed controllers, each configured to control an equipment to be controlled by inputting a status quantity of said equipment and to convert said status quantity into digital data, and a display controller connected to each of said plurality of distributed controllers via a communication network and configured to display a status and control an operation of each of said plurality of distributed controllers, said method steps comprising:
receiving step a setting program module for setting at least one of said plurality of distributed controllers from at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers;
executing a received setting program module;
outputting an execution result as a knowledge of said setting program module at at least one of said plurality of distributed controllers; and sending said setting program module after addition thereto of said knowledge to at least one of said display controller and at least one of said plurality of distributed controllers via said communication network at at least one of said plurality of distributed controllers.