CN100511900C - DC power guiding transmission deicing operation method - Google Patents
DC power guiding transmission deicing operation method Download PDFInfo
- Publication number
- CN100511900C CN100511900C CN 200810084583 CN200810084583A CN100511900C CN 100511900 C CN100511900 C CN 100511900C CN 200810084583 CN200810084583 CN 200810084583 CN 200810084583 A CN200810084583 A CN 200810084583A CN 100511900 C CN100511900 C CN 100511900C
- Authority
- CN
- China
- Prior art keywords
- power
- direct current
- deicing
- transmission
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a deicing special running mode of bipolar power contrary transmission of a direct current transmission system. In the running mode, one pole of the direct current system transmits forward power, and the other pole transmits backward power. The two poles can run in larger power to form a power circulation; and the direct current lines of the two poles can generate larger direct currents, thereby generating enough heat for deicing. Since the contrary transmission is adopted in the bipolar power, the power transmitted between two stations is still small after the power of the two poles is counteracted partially, so as to suit the condition of low load in low water season. The deicing special running mode can meet the requirement of deicing a direct current line with low load in low water season, and solve the problem of icing the direct current line with low load in low water winter.
Description
Technical field
The present invention relates to the special-purpose operational mode of ice-melt of the incorgruous transmission of HVDC (High Voltage Direct Current) transmission system bipolar power, more particularly this method DC transmission system of being used for the free voltage grade is used for the operational mode of DC line ice-melt in dry season, utilize the utmost point one of DC transmission system that power is transferred to the inversion side by the rectification side, utilize the utmost point two that power is transmitted back the rectification side by the inversion side again, thereby under the situation of not carrying out power delivery between rectification side and the inversion top-cross drift net, finish the DC line charging operation, and DC line is carried out ice-melt by the heating of direct current on DC line.
Background technology
China is one of the most serious country of powerline ice-covering in the world.Serious icing can cause transmission line machinery and electric property sharply to descend, thereby causes the generation of icing accident.The powerline ice-covering accident all once took place in provinces such as China Hunan, Hubei, Guizhou, Jiangxi, Yunnan, Sichuan, Henan and Shaanxi.The icing accident serious threat the safe operation of China's electric power system, and cause enormous economic loss.
2008 since winter has set in, and the big severe snow of not meeting decades has appearred in some areas of China, at the Yellow River and Huai He River, Yangze river and Huai river, northern this band in the south of the River, caught up with strong cold air and gone down south, and temperature is lower, and water vapor condition is relatively good again, so big severe snow weather occurred.The sleet freezing weather that continues makes supply of electric power situation and sternness thereof.Because of transmission line and shaft tower large tracts of land icing, some areas electrical network power transformating and supplying facility is impaired in succession, and relevant power plant generating set is therefore tripping grinder also.
On history, since the fifties in last century, according to incompletely statistics, big and small icing accident takes place thousands of times in China's transmission line.Only 2003, because the 110-500kV transmission line that icing causes trips 79 times, account for 3.27% of total accident, wherein the 500kV line tripping is 13 times; Because the unplanned stoppage in transit of 110-500kV circuit that icing causes 47 times accounts for 4.24% of total accident.In December, 2004～2005 year February, large tracts of land ice damage accident appears in China's Central China Power Grid, and only the Hunan Province just has more than 700 ten thousand people disaster-stricken, and direct economic loss is above 1,000,000,000 yuan.
For solving the circuit ice formation issues under the ice and snow weather in winter, multiple solution is arranged.From present case, the main means of power network line deice and rush to rescue are still manually stepped on the tower deicing based on traditional, and this method is not only dangerous, and efficient is not high, is the remedial measure afterwards of doing something against one's will.To fundamentally improve the anti-ice damage ability of transmission line, must be from design and technical starting with, because DC transmission system is a highly controlled system, under the situation that does not change direct current system main loop design and main electrical scheme, make full use of original DC line and other primary equipments, realizing line ice-melting by changing operational mode, ensure safety, the stable operation of AC and DC transmission line under extreme weather conditions, will be the most economic solution.
The present invention proposes the DC operation mode that is used for the DC line ice-melt based on the DC transmission system of moving at present in the winter time under the situation of DC line icing; this method does not need primary equipment is carried out any modification, only need make amendment and can realize the software of the control protection system of existing DC transmission system.
Summary of the invention
The objective of the invention is to propose a kind of ice melting operation mode of DC transmission system, this mode does not need primary equipment is transformed or upgraded, and only need can realize the software transformation of electrical secondary system.Under dry season little load condition, this ice melting operation mode is more suitable, utilize the utmost point one of DC transmission system that power is transferred to the inversion side by the rectification side, utilize the utmost point two that power is transmitted back the rectification side by the inversion side again, thereby under the situation of not carrying out power delivery between rectification side and the inversion top-cross drift net, finish the DC line charging operation, and DC line is carried out ice-melt by the heating of direct current on DC line.
Description of drawings
Fig. 1 is a direct current system flow of power direction schematic diagram when adopting DC power guiding transmission deicing operation method.
Embodiment
Adopting under the DC power guiding transmission deicing operation method, as shown in Figure 1, the utmost point one of sending adopts the rectification operation, and the receiving-end system utmost point one adopts inverter operation, and for sending receiving-end system, direct current power is transported to receiving end by sending end, is the forward power transmission; Meanwhile, the utmost point two of receiving-end system adopts the rectification operation, and the sending utmost point two adopts inverter operation, and for sending receiving-end system, direct current power is transported to sending end by receiving end, is the backward power transmission.Under above-mentioned operational mode, the utmost point one and the utmost point two can move bigger power, form power circulation; All can produce bigger direct current in the DC line at the two poles of the earth.Because the utmost point one of both sides and the power of the utmost point two adopt incorgruous transmission, the power at the two poles of the earth is cancelled out each other after the part, the power that transmits between actual sending and receiving-end system is very little, so both can satisfy the requirement of DC line at little load in dry season, can also realize the ice-melt requirement of DC line simultaneously.
For the DC transmission system of having moved at present; in order to adopt this method to realize the function of ice melting operation; also need need carry out specialized designs and research and development to the relevant control defencive function in the software of electrical secondary system is transformed, the aspect that relates to mainly comprises:
1, direct current sequential control function
2, direct current power Current Control function
3, the idle controlled function of direct current system
4, converter transformer tap controlled function
5, DC line traveling-wave protection
6, operations staff's control system interface modification
After revising control corresponding protection software, adopt ice melting operation mode of the present invention, for building up the DC transmission system line ice-melting that puts into operation, will be the most economic solution.
Claims (2)
1, a kind of HVDC (High Voltage Direct Current) transmission system ice melting operation method, it is characterized in that: a utmost point forward power of an end of HVDC (High Voltage Direct Current) transmission system, another utmost point reverse transfer power of this end, form power circulation, all can produce the direct current that satisfies the ice-melt heat in two DC line that the utmost point connected.
2, HVDC (High Voltage Direct Current) transmission system ice melting operation method as claimed in claim 1, it is characterized in that: there are not Power Exchange substantially in sending end AC system that is connected with DC transmission system and receiving end AC system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810084583 CN100511900C (en) | 2008-04-09 | 2008-04-09 | DC power guiding transmission deicing operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810084583 CN100511900C (en) | 2008-04-09 | 2008-04-09 | DC power guiding transmission deicing operation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101325323A CN101325323A (en) | 2008-12-17 |
| CN100511900C true CN100511900C (en) | 2009-07-08 |
Family
ID=40188721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810084583 Expired - Fee Related CN100511900C (en) | 2008-04-09 | 2008-04-09 | DC power guiding transmission deicing operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100511900C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552443B (en) * | 2008-12-30 | 2011-08-31 | 国家电网公司 | Method for melting ice of dipolar direct current transmission line |
| CN102427211A (en) * | 2011-10-11 | 2012-04-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | EMTDC (Electro Magnetic Transient in DC System) modeling method with dipolar DC (Direct Current) power incongruous transmission ice melting function |
-
2008
- 2008-04-09 CN CN 200810084583 patent/CN100511900C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101325323A (en) | 2008-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100511899C (en) | AC line-feeding deicing connection plan for current-exchanging station | |
| CN101242087A (en) | Ice fusion method for power transmission line | |
| CN204156540U (en) | A kind of solar module ice melting system | |
| CN101557090B (en) | De-icing device with wattless current injected in the end of transmission line | |
| CN101847856A (en) | Power transmission line direct current ice melting device based on twelve pulse wave uncontrollable rectification | |
| CN101604833B (en) | Ground wire deicing device capable of combined use | |
| CN201341007Y (en) | High-low voltage power line deicing vehicle | |
| Zhu et al. | Research on melting and de-icing methods of lines in distribution network | |
| CN100511900C (en) | DC power guiding transmission deicing operation method | |
| CN204244102U (en) | A kind of electric power transmission line 10KV power cable deicing device | |
| CN201438633U (en) | Direct-current thawing device for 10kV transmission and distribution lines | |
| CN108092182A (en) | Ultra-high-tension power transmission line is segmented de-icing method and system | |
| CN101436768A (en) | Power line DC ice-melting device | |
| CN103337824A (en) | Segmentation direct-current deicing system of extreme high voltage direct-current transmission line | |
| CN113161967B (en) | Phase-shifting online ice melting method based on flexible interconnected transformer substation | |
| CN101304168B (en) | Method for preventing ice and snow calamity of overhead transmission line | |
| CN101436769B (en) | Mobile power line DC ice-melting device | |
| CN103647243B (en) | A kind of de-icing method of direct current transmission line of extra-high-voltage direct current project and device | |
| CN201234103Y (en) | Transmission line DC ice melting device capable of combined use | |
| CN202957555U (en) | Alternating current ice melting device of power distribution line | |
| CN102931621B (en) | Alternating-current ice melting device for distribution line | |
| CN201436754U (en) | Ground wire ice-thawing device capable of being used combinedly | |
| CN204905818U (en) | Multiplexing novel direct current ice -melt device of wire and ground wire | |
| CN201682248U (en) | Electric transmission line DC ice melting device based on twelve-pulse uncontrolled rectifying | |
| CN217055490U (en) | Wind power generation fan ice melting system for southern mountainous region |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: State Grid DC Project Construction Co., Ltd. Zhang Min Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: State Grid DC Project Construction Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20120409 |