CN104836202A - Static circuit breaker used for eliminating closing excitation surge current of transformer - Google Patents
Static circuit breaker used for eliminating closing excitation surge current of transformer Download PDFInfo
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- CN104836202A CN104836202A CN201510258035.XA CN201510258035A CN104836202A CN 104836202 A CN104836202 A CN 104836202A CN 201510258035 A CN201510258035 A CN 201510258035A CN 104836202 A CN104836202 A CN 104836202A
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Abstract
The invention relates to a static circuit breaker used for eliminating closing excitation surge current of a transformer, which comprises a high-voltage main circuit and a controller, wherein the controller is connected to a voltage measurement module, a current measurement module and an excitation regulating module. The high-voltage main circuit is formed by connecting a plurality of groups of high-power electric power and electronic devices in series or in parallel, wherein series connection is used for realizing high operating voltage, and parallel connection is used for realizing high operating current. The voltage measurement module comprises a voltage transformer and a voltage conversion and input module, and the voltage measurement module is used for measuring system voltage at a closing side of the transformer. The current measurement module comprises a current transformer and a current conversion and input module, and the current measurement module is used for measuring input current of a transformer winding. The static circuit breaker used for eliminating the excitation surge current of the transformer can eliminate excitation surge current in the closing transient process of the transformer, and has the advantages of accurate voltage control, stable output, ability of meeting normal loaded operations of the transformer and the like.
Description
Technical field
A kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current of the present invention, relates to power transformer field.
Background technology
Transformer is the visual plant carrying out power conversion in electric power system, power converter, conveying, in extensive use.The magnetizing inrush current of higher magnitude always can be produced during Transformer Close; usually cause tranformer protection action and failure of closing a floodgate; also because magnetizing inrush current is comparatively large, harmonic wave is complicated and have harmful effect to system and other power equipment; this is a difficult problem for a long-standing problem power department; especially in the industry department such as chemical metallurgy, track traffic, high-speed railway; transformer needs the application scenario of frequent switching; the adverse effect of magnetizing inrush current makes supply of electric power reliability greatly reduce, and traditional direct combined floodgate inevitably produces magnetizing inrush current.
Summary of the invention
The invention provides a kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current, can magnetizing inrush current in eliminating transformer combined floodgate transient process, make Transformer Close become a stable transient process, cardinal principle, thoroughly solve the technical barrier of huge magnetizing inrush current during Transformer Close.Have voltage control accurately, stable output, response time be short, be applicable to rapid closing separating brake, meet the advantages such as the normal bringing onto load operation of transformer.
The technical scheme that the present invention takes is:
For a static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current, comprise high pressure major loop, controller, controller connects voltage measurement module, current measurement module, excitation regulation module respectively.High pressure major loop consists of series connection or parallel connection by organizing device for high-power power electronic more; Coupled in series is for realizing higher operating voltage, and parallel connection is for realizing larger operating current, and voltage measurement module comprises voltage transformer, voltage transformation and input module, and described voltage measurement module is used for measuring transformer combined floodgate side system voltage.Current measurement module comprises current transformer, current transformation and input module, and described current measurement module is used for measuring transformer winding input current.Controller comprises CPU module, human-machine interface module, parallel optical fibre interface, and CPU module connects human-machine interface module, parallel optical fibre interface respectively; The voltage that controller is measured according to voltage measurement module, to excitation regulation module output control pulse, regulates the angle of flow of high pressure major loop device for high-power power electronic group, controls the electric current that it exports the quick increase from 0, as transformer magnetizing current.
Described voltage transformation and input module, comprise voltage changer, operational amplifier, sampling maintenance and AD converter, and system primary side voltage, after voltage transformer, voltage transformation and input module, is converted to digital signal, reads in CPU module.
Described current transformation and input module, comprise power pack, operational amplifier, sampling maintenance and AD converter, main loop primary side current, after current transformer, current transformation and input module, is converted to digital signal, reads in CPU module.
Described excitation regulation module is made up of light-sensitive element, and the device for high-power power electronic group grid control section of high pressure major loop, is connected to the parallel optical fibre interface of controller.
Described device for high-power power electronic is SCR, IGBT, IGCT or GTO.
A kind of method for eliminating transformer combined floodgate magnetizing inrush current, under the controller of static circuit breaker controls, the exciting current that by predefined function relation fast increase of amplitude from 0 is added in Transformer Winding, Transformer Winding produces normal voltage fast, and transformer core magnetic field is without transient process, does not produce magnetizing inrush current.
A kind of method for eliminating transformer combined floodgate magnetizing inrush current, when transformer during no-load closing, under controller regulates, excitation regulation module increases the device for high-power power electronic group angle of flow gradually, high pressure major loop exports the exciting current increased fast from 0, make transformer core produce stabilizing magnetic field fast, and produce stable working voltage in Transformer Winding, complete transformer and drop into operation; When transformer enters normal condition, the complete conducting of high-power electric and electronic element group, to transformer output load current; When needs disconnecting transformer, under controller regulates, this excitation regulation module reduces the device for high-power power electronic group angle of flow fast, makes its output current become 0 rapidly, completes transformer rupturing operation.
A kind of method for eliminating transformer combined floodgate magnetizing inrush current, line voltage and transformer current is measured respectively by voltage transformer, current transformer, Transformer Close is exactly regulate the high pressure major loop device for high-power power electronic group angle of flow by controller, control transformer exciting current increases rapidly by predefined function relation from 0, until Transformer Winding produces normal operating voltage, complete combined floodgate; Transformer separating brake is then regulate the high pressure major loop device for high-power power electronic group angle of flow by controller by excitation regulation module, realizes turning off fast.
A kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current of the present invention, technique effect is as follows:
1), high pressure major loop is by such as: the circuit that SCR, IGBT, IGCT or GTO etc. form is formed, the requirements such as the load capacity of applied environment, the class of insulation, electromagnetic compatibility can be met, this element group is under controller regulates, export the transformer magnetizing current of starting from scratch and increasing rapidly, until Transformer Winding produces normal operating voltage, complete combined floodgate, transformer enters normal operation afterwards, and controller regulates the complete conducting of static circuit breaker element group.
2), the fast and non-transient process of the input excision service speed that can realize transformer, according to structure and the applied environment of transformer, this static circuit breaker is used for eliminating transformer combined floodgate magnetizing inrush current.Static circuit breaker can be single-phase or three-phase mode, both can bear transformer load after completing input, and also according to the actual requirements, can bear transformer load and exit this static circuit breaker after completing input by other conventional circuit breaker.
3), complete eliminating transformer combined floodgate magnetizing inrush current; Transformer Close is operated without transient process; harmful effect is not produced to electrical network, transformer and protection system thereof; this static circuit breaker also may be used for quick-switching transformer simultaneously, and being particularly suitable for needs in the commercial Application of frequent quick-switching transformer.
4), this static circuit breaker core adopts device for high-power power electronic group high pressure major loop and by computer-controlled excitation regulation module composition, meet the required insulation of running environment and EMC Requirements, compact conformation, volume are little, lightweight, and the portable structure of movable type, vehicular can be made into, be applicable to industrial mass manufacture.
5), high pressure major loop adopts high-power electric and electronic circuit, the response speed of this static circuit breaker can be improved and bear the ability of load, being suitable for the commercial Application of the frequent quick-switching transformer of high reliability in the complicated severe electromagnetic environment such as chemical metallurgy, electric locomotive, high-speed railway.
Accompanying drawing explanation
Fig. 1 is the static breaker control schematic diagram of the present invention for eliminating transformer combined floodgate magnetizing inrush current.
Fig. 2 is the static breaker structure block diagram of the present invention, in figure, voltage transformation and input circuit, current transformation and input circuit, operation amplifier circuit, sampling maintenance and AD converter form voltage and current conversion and input module circuit, in figure, empty frame part is depicted as high pressure major loop and controller module, by high pressure major loop and excitation regulation module thereof, CPU module, human-machine interface module, the part such as parallel optical fibre interface is formed, the control signal of cpu system, by parallel optical fibre interface and light-sensitive element, control impuls is sent to high pressure major loop high power device grid, control the angle of flow of high power device, thus control high pressure major loop output voltage, electric current, when transformer drops into, control main transformer exciting current by according to predetermined functional relation from 0 to large increase, realize the effect eliminating magnetizing inrush current.
Embodiment
As shown in Figure 1 and Figure 2, a kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current, comprising:
1), high pressure major loop, excitation regulation module: high pressure major loop consists of series, parallel connection by organizing device for high-power power electronic more.Coupled in series can realize higher operating voltage, and parallel connection can realize larger operating current, and device for high-power power electronic can be SCR, IGBT, IGCT, GTO etc.; Excitation regulation module is the device for high-power power electronic group grid control section be made up of light-sensitive element.
2), controller: controller connects voltage measurement module, current measurement module, excitation regulation module respectively; Controller is connected with excitation regulation module light-sensitive element by optical fiber, can solve the problems such as High-Voltage Insulation, control signal be anti-interference better;
3), voltage measurement module: voltage measurement module comprises voltage transformer, voltage transformation and input module, and described voltage measurement module is used for measuring transformer system side voltage.Described voltage transformation and input module, comprise voltage changer, operational amplifier, sampling maintenance and AD converter, and system primary side voltage, after voltage transformer, voltage transformation and input module, is converted to digital signal, reads in CPU module.
4), current measurement module: current measurement module comprises current transformer, current transformation and input module, and described current measurement module is used for measuring transformer winding input current.Described current transformation and input module, comprise power pack, operational amplifier, sampling maintenance and AD converter, main loop primary side current, after current transformer, current transformation and input module, is converted to digital signal, reads in CPU module.
The voltage that controller is measured according to voltage measurement module, the device for high-power power electronic group angle of flow is regulated by excitation regulation module, control high pressure major loop output current to increase fast according to predetermined functional relation from 0, make transformer magnetizing current be increased to rated exciting current without transient process from 0; Current function relation can be predefined for ramp function, exponential function, hyperbolic function, quadratic function etc.
Described excitation regulation module is high-power electric and electronic circuit, high pressure major loop is formed by device for high-power power electronic (SCR, IGBT, IGCT, GTO etc.), form its grid control section by light-sensitive element, the part such as CPU module, human-machine interface module, parallel optical fibre interface forms controller part.
A kind of method for eliminating transformer combined floodgate magnetizing inrush current, when transformer drops into, under the controller of static circuit breaker controls, Transformer Winding add amplitude from 0, by the exciting current that increases fast of setting functional relation, when exciting current reaches rated exciting current, Transformer Winding produces normal voltage fast, reach system operating voltage, the foundation in transformer core magnetic field, without transient process, therefore, does not produce magnetizing inrush current in winding.
A kind of method for eliminating transformer combined floodgate magnetizing inrush current, when transformer during no-load closing, under cpu system regulates, controller is by parallel optical fibre interface and light-sensitive element, control wave is sent to high pressure major loop high power device grid, control the angle of flow of high power device, the angle of flow of forward conduction high power device from 180 ° to 0 ° of direction Rapid Variable Design, the angle of flow of reverse-conducting high power device from 360 ° to 180 ° of direction Rapid Variable Design, thus control the exciting current of high pressure major loop output current increase fast from 0, until reach rated exciting current, usual transformer rated exciting current is about 1.0% rated current, current measurement module measures the size of exciting current by current transformer, if when exciting current is greater than rated exciting current, controller will reduce angle of flow pace of change, thus control exciting current is not more than rated exciting current all the time, until Transformer Winding reaches burning voltage, so transformer core magnetic flux density increases from 0, and reach the stabilizing magnetic field of specified normal work fast, the magnetic flux density in usual transformer core magnetic field is in 1.7 to 2.0 teslas, when exciting current increases from 0, the residual flux in transformer core, will be eliminated in the process, so, produce stable working voltage in Transformer Winding, complete transformer and drop into operation.When Transformer Winding voltage enters normal condition, controller regulates the complete conducting of high-power electric and electronic element group, and transformer magnetizing current no longer increases, and after this, transformer normally works, output load voltage, electric current; When transformer is stopped transport, regulate the high-power electric and electronic element group angle of flow to turning off completely at controller, transformer output current becomes 0 rapidly, completes transformer and cuts off operation of stopping transport.
Claims (8)
1. for a static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current, comprise high pressure major loop, controller, it is characterized in that, controller connects voltage measurement module, current measurement module, excitation regulation module respectively;
High pressure major loop consists of series connection or parallel connection by organizing device for high-power power electronic more; Coupled in series for realizing higher operating voltage, parallel connection for realizing larger operating current,
Voltage measurement module comprises voltage transformer, voltage transformation and input module, and described voltage measurement module is used for measuring transformer combined floodgate side system voltage;
Current measurement module comprises current transformer, current transformation and input module, and described current measurement module is used for measuring transformer winding input current;
Controller comprises CPU module, human-machine interface module, parallel optical fibre interface, and CPU module connects human-machine interface module, parallel optical fibre interface respectively; The voltage that controller is measured according to voltage measurement module, to excitation regulation module output control pulse, regulates the angle of flow of high pressure major loop device for high-power power electronic group, controls the electric current that it exports the quick increase from 0, as transformer magnetizing current.
2. a kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current according to claim 1, it is characterized in that, described voltage transformation and input module, comprise voltage changer, operational amplifier, sampling maintenance and AD converter, system primary side voltage is after voltage transformer, voltage transformation and input module, be converted to digital signal, read in CPU module.
3. a kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current according to claim 1, it is characterized in that, described current transformation and input module, comprise power pack, operational amplifier, sampling maintenance and AD converter, main loop primary side current is after current transformer, current transformation and input module, be converted to digital signal, read in CPU module.
4. a kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current according to claim 1, it is characterized in that, described excitation regulation module is made up of light-sensitive element, and the device for high-power power electronic group grid control section of high pressure major loop, is connected to the parallel optical fibre interface of controller.
5. a kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current according to claim 1, it is characterized in that, described device for high-power power electronic is SCR, IGBT, IGCT or GTO.
6. adopt the method for the eliminating transformer combined floodgate magnetizing inrush current of any one static circuit breaker as described in claim 1 ~ 5, it is characterized in that, under the controller of static circuit breaker controls, the exciting current that by predefined function relation fast increase of amplitude from 0 is added in Transformer Winding, Transformer Winding produces normal voltage fast, and transformer core magnetic field is without transient process, does not produce magnetizing inrush current.
7. adopt the method for the eliminating transformer combined floodgate magnetizing inrush current of any one static circuit breaker as described in claim 1 ~ 5, it is characterized in that, when transformer during no-load closing, under controller regulates, excitation regulation module increases the device for high-power power electronic group angle of flow gradually, and high pressure major loop exports the exciting current increased fast from 0, makes transformer core produce stabilizing magnetic field fast, and produce stable working voltage in Transformer Winding, complete transformer and drop into operation; When transformer enters normal condition, the complete conducting of high-power electric and electronic element group, to transformer output load current; When needs disconnecting transformer, under controller regulates, this excitation regulation module reduces the device for high-power power electronic group angle of flow fast, makes its output current become 0 rapidly, completes transformer rupturing operation.
8. adopt the method for the eliminating transformer combined floodgate magnetizing inrush current of any one static circuit breaker as described in claim 1 ~ 5, it is characterized in that, line voltage and transformer current is measured respectively by voltage transformer, current transformer, Transformer Close is exactly regulate the high pressure major loop device for high-power power electronic group angle of flow by controller, control transformer exciting current increases rapidly by predefined function relation from 0, until Transformer Winding produces normal operating voltage, complete combined floodgate; Transformer separating brake is then regulate the high pressure major loop device for high-power power electronic group angle of flow by controller by excitation regulation module, realizes turning off fast.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510258035.XA CN104836202A (en) | 2015-05-20 | 2015-05-20 | Static circuit breaker used for eliminating closing excitation surge current of transformer |
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| CN201510258035.XA CN104836202A (en) | 2015-05-20 | 2015-05-20 | Static circuit breaker used for eliminating closing excitation surge current of transformer |
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| CN201510258035.XA Pending CN104836202A (en) | 2015-05-20 | 2015-05-20 | Static circuit breaker used for eliminating closing excitation surge current of transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571760A (en) * | 2019-10-21 | 2019-12-13 | 国家电网有限公司 | Transformer closing inrush current treatment device |
| CN110703146A (en) * | 2019-09-23 | 2020-01-17 | 长春长客-庞巴迪轨道车辆有限公司 | Excitation surge current measuring instrument |
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| US5563459A (en) * | 1989-11-15 | 1996-10-08 | Hitachi, Ltd. | Apparatus for controlling opening and closing timings of a switching device in an electric power system |
| CN1700550A (en) * | 2005-04-27 | 2005-11-23 | 叶念国 | Method for suppressing power transformer excitation surge current and suppressor |
| CN101075498A (en) * | 2007-04-13 | 2007-11-21 | 中国南车集团株洲电力机车研究所 | Method and device for inhibiting transformer no-load switchon surge |
| CN202978225U (en) * | 2012-12-27 | 2013-06-05 | 保定天威集团有限公司 | Magnetizing inrush current research device for three-phase transformer |
| CN203278211U (en) * | 2013-05-10 | 2013-11-06 | 摩普(青岛)机电控制有限公司 | Transformer excitation inrush current eliminating device |
| CN204597458U (en) * | 2015-05-20 | 2015-08-26 | 三峡大学 | A kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5563459A (en) * | 1989-11-15 | 1996-10-08 | Hitachi, Ltd. | Apparatus for controlling opening and closing timings of a switching device in an electric power system |
| CN1700550A (en) * | 2005-04-27 | 2005-11-23 | 叶念国 | Method for suppressing power transformer excitation surge current and suppressor |
| CN101075498A (en) * | 2007-04-13 | 2007-11-21 | 中国南车集团株洲电力机车研究所 | Method and device for inhibiting transformer no-load switchon surge |
| CN202978225U (en) * | 2012-12-27 | 2013-06-05 | 保定天威集团有限公司 | Magnetizing inrush current research device for three-phase transformer |
| CN203278211U (en) * | 2013-05-10 | 2013-11-06 | 摩普(青岛)机电控制有限公司 | Transformer excitation inrush current eliminating device |
| CN204597458U (en) * | 2015-05-20 | 2015-08-26 | 三峡大学 | A kind of static circuit breaker for eliminating transformer combined floodgate magnetizing inrush current |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703146A (en) * | 2019-09-23 | 2020-01-17 | 长春长客-庞巴迪轨道车辆有限公司 | Excitation surge current measuring instrument |
| CN110571760A (en) * | 2019-10-21 | 2019-12-13 | 国家电网有限公司 | Transformer closing inrush current treatment device |
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Application publication date: 20150812 |