CN110244217B - Test method for hybrid high-voltage direct-current circuit breaker - Google Patents
Test method for hybrid high-voltage direct-current circuit breaker Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
A test method for a hybrid high-voltage direct-current circuit breaker. According to the invention, through the four parts of the auxiliary through-current branch consisting of the low-voltage large current source, the test inductor and the power electronic module and the parallel overvoltage protection branch, the continuous and stable test current is generated by the auxiliary through-current branch consisting of the low-voltage large current source and the power electronic module, and then the current provided by the continuous operation test circuit is converted to the test product, namely the hybrid high-voltage direct-current circuit breaker, so that the investigation of the rated current closing test capability of the test product is completed.
Description
Technical Field
The invention relates to the field of power electronic detection, in particular to a test method for a hybrid high-voltage direct-current circuit breaker.
Background
Hybrid high voltage direct current circuit breakers are important devices for maintaining reliable operation of high voltage direct current power grids. Which breaks the current through the power electronics. When the breaker normally operates, the on-state loss is small, and the breaking time period is realized. And in the breaking process of the direct current breaker, responding to the faults in different stages according to the set time sequence of the direct current breaker, and executing different fault processing steps.
However, for the fault of the existing hybrid high-voltage direct-current circuit breaker, no proper mode is realized at present. The existing mode can only simulate line faults under the condition of low voltage and low current and simulate the detection and response operation of the faults. The reason is that the high-voltage and high-current state of the hybrid high-voltage direct-current circuit breaker can cause impact on a circuit of a test instrument and damage test equipment when fault test detection is carried out.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a test method for a hybrid high-voltage direct-current circuit breaker.
Firstly, in order to achieve the above object, a testing method for a hybrid high voltage dc circuit breaker is provided, which includes the steps of: firstly, a test circuit is built, wherein the test circuit comprises: the low-voltage high-current source, the test inductor, the protection branch and the auxiliary concurrent branch are connected in series; after the protection branch circuit and the auxiliary through-current branch circuit are connected with the hybrid high-voltage direct-current circuit breaker in parallel, the protection branch circuit and the auxiliary through-current branch circuit are connected with the low-voltage large current source through the test inductor; secondly, starting the low-voltage large current source, and providing continuous and stable test current for the hybrid high-voltage direct-current circuit breaker and the auxiliary through-current branch; thirdly, the auxiliary through-current loop receives the test current, and is locked after the test current is stable so as to inject high-voltage test current into the hybrid high-voltage direct-current circuit breaker, complete the current conversion of the hybrid high-voltage direct-current circuit breaker and then be locked; fourthly, the hybrid high-voltage direct-current circuit breaker is triggered by the high-voltage experimental current and is reliably contacted, so that the closing operation is completed according to the control time sequence in the hybrid high-voltage direct-current circuit breaker during the locking period of the auxiliary through-current branch circuit; fifthly, the auxiliary through-current loop receives the test current converted back by the hybrid high-voltage direct-current circuit breaker after the closing operation of the hybrid high-voltage direct-current circuit breaker is completed; in each step, the protection branch circuit always detects the voltage of a sampling point of the hybrid high-voltage direct-current circuit breaker to perform overvoltage protection on the hybrid high-voltage direct-current circuit breaker; the test inductor generates an induced potential when the test current fluctuates to offset the test current fluctuation.
Optionally, in the above test method, in the test circuit set up in the first step, the low-voltage large current source is formed by a thyristor rectifier.
Optionally, in the test method, in the test circuit constructed in the first step, the auxiliary through-current branch is composed of an IGBT device and an energy storage element.
Optionally, in the test method, in the test circuit set up in the first step, the energy storage element in the auxiliary through-current branch is a double-layer metallized film capacitor or a polypropylene non-polar capacitor.
Optionally, in the above test method, in the test circuit built in the first step, the stray inductance of the energy storage element is lower than 50nH.
Optionally, in the above test method, in the test circuit built in the first step, the auxiliary current branch includes at least one pair of auxiliary current valves connected in parallel.
Optionally, in the test method, in the test circuit set up in the first step, each auxiliary flow valve includes at least two sets of unit circuits, and each set of unit circuits is connected in parallel to two ends of the protection circuit; each of the sets of unit circuits includes: 4 IGBT devices and 1 capacitor; the emitter of the first IGBT device is connected with the first pin of the capacitor and the emitter of the second IGBT device, the collector of the first IGBT device is connected with the emitter of the fourth IGBT device, the collector of the fourth IGBT device is simultaneously connected with the collector of the third IGBT device and the second pin of the capacitor, the emitter of the third IGBT device is connected with the collector of the second IGBT device, and a switching element is further connected in series between the emitter of the third IGBT device and the emitter of the fourth IGBT device and used for controlling the flowing state of current in the auxiliary through-flow branch circuit.
Optionally, in the test circuit set up in the first step, in the protection branch circuit, the thyristor is connected in series with the low-voltage large current source and the test inductor through its positive and negative electrodes, the gate level of the thyristor is connected to the overvoltage determination circuit, the overvoltage determination circuit compares the obtained sampling voltage with the reference voltage input to the overvoltage determination circuit, and when the sampling voltage is greater than the reference voltage, outputs a control signal to the gate level of the thyristor to switch the protection branch circuit to the protection state.
Optionally, in the test method, in the test circuit established in the first step, the maximum repeatable peak current of the collector accumulated by each IGBT device in the auxiliary flow valve at least reaches the rated current of the hybrid high-voltage dc circuit breaker.
Advantageous effects
The invention designs a novel device for testing a hybrid high-voltage direct-current circuit breaker, which comprises an auxiliary through-current branch and a parallel overvoltage protection branch, wherein the auxiliary through-current branch consists of a low-voltage large current source, a test inductor and a power electronic module. An auxiliary through-current branch consisting of a low-voltage large current source and a power electronic module is adopted to generate continuous and stable test current, and then the current provided by a continuous operation test circuit is converted to a test article, namely a hybrid high-voltage direct-current circuit breaker, through the auxiliary through-current branch, so that the investigation of the rated current closing test capability of the test article is completed.
The test device of this patent design can realize closing the recurrence of stress through the accurate control sample current stress of the current conversion function of supplementary through-flow branch road to do not harm sample itself.
In addition, the test method designed by the patent simplifies the design of accurate control of a power supply part in the test device, reduces the overall time sequence control difficulty of the test method through the current conversion of the auxiliary through-current branch, and greatly reduces the test capacity.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic circuit diagram of a hybrid high voltage direct current circuit breaker according to the present invention;
FIG. 2 is a block circuit diagram of an experimental set-up according to the present invention;
fig. 3 is a schematic circuit diagram of an auxiliary vent valve in the experimental apparatus of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The flexible direct current transmission has a plurality of technical advantages, becomes one of hot point transmission technologies which are vigorously developed in the international power field at present, and is also an important component part for constructing a future power grid. Due to the low damping characteristic of the direct current system, compared with an alternating current system, the direct current system has the advantages of faster fault development and higher control and protection difficulty, and a high-voltage direct current breaker is urgently needed for direct current fault isolation and rapid fault recovery. The high-voltage direct-current circuit breaker is one of important basic and key equipment for the construction of a direct-current power grid.
Hybrid high voltage direct current circuit breakers are the mainstream technical route for high voltage direct current circuit breakers. Referring to fig. 1, the hybrid high voltage dc circuit breaker includes a main branch composed of a fast mechanical switch and a small number of power electronic modules connected in series, a transfer branch composed of a large number of power electronic modules connected in series, and an energy consumption branch composed of an arrester group connected in series and parallel.
The invention provides a feasible experimental device for the hybrid high-voltage direct-current circuit breaker shown in fig. 1, and the circuit principle of the experimental device can refer to fig. 2. The device can be used for rated current closing tests and short-time current tolerance tests of the hybrid high-voltage direct-current circuit breaker. The device is mainly used for testing the switching-on and switching-off performance of the hybrid high-voltage direct-current circuit breaker and the correctness of the design of the control protection unit. As no available direct current breaker type test standard exists at present, the method for effectively verifying the rated current closing capability of the hybrid high-voltage direct current breaker lays a foundation for popularization and application of the high-voltage direct current breaker and establishment of test standards.
The testing device comprises an auxiliary through-current branch and a parallel overvoltage protection branch, wherein the auxiliary through-current branch consists of a low-voltage large current source, a testing inductor and a power electronic module; the low-voltage large current source provides continuous and stable test current, and high voltage is generated in the process that the current is converted from the auxiliary current return circuit to the direct current breaker, so that the direct current breaker is reliably contacted; the test inductor is used for reducing the fluctuation of test current; the auxiliary through-current branch is used for bearing test current and completing current conversion to the test product loop; the parallel protection branch is used for overvoltage protection of the test sample.
The low-voltage large current source is composed of a thyristor rectifier and can provide continuous, stable and adjustable constant current.
The auxiliary through-current branch circuit consists of an IGBT device and an energy storage element, can effectively realize long-term through-current, current conversion and IGBT soft turn-off, and can be used for bearing test current and completing bidirectional current conversion to a test product loop. As shown in fig. 3: the auxiliary through-flow branch comprises at least one pair of auxiliary through-flow valves connected in parallel. Each auxiliary flow through valve comprises at least two groups of unit circuits, and each group of unit circuits are connected to two ends of the protection circuit in parallel; each of the sets of unit circuits includes: 4 IGBT devices and 1 capacitor; the emitter of the first IGBT device is connected with the first pin of the capacitor and the emitter of the second IGBT device, the collector of the first IGBT device is connected with the emitter of the fourth IGBT device, the collector of the fourth IGBT device is simultaneously connected with the collector of the third IGBT device and the second pin of the capacitor, the emitter of the third IGBT device is connected with the collector of the second IGBT device, and a switching element is further connected in series between the emitter of the third IGBT device and the emitter of the fourth IGBT device and used for controlling the flowing state of current in the auxiliary through-flow branch circuit; the unit circuits are connected in series through the collector of the first IGBT device and the collector of the second IGBT device.
The parallel overvoltage protection branch circuit is composed of a series thyristor and an overvoltage judging circuit, and overvoltage protection of the test article can be achieved.
And the energy storage element in the auxiliary through-flow branch is a double-layer metallized film capacitor or a polypropylene electrodeless capacitor. The stray inductance of the energy storage element is lower than 50nH.
When the device is used for testing the hybrid high-voltage direct-current circuit breaker, an auxiliary through-current branch consisting of a low-voltage large current source and a power electronic module generates continuous and stable test current, and then the current provided by the continuous operation test circuit is converted to a test product through the auxiliary through-current branch, namely the hybrid high-voltage direct-current circuit breaker. The breaker completes the closing action, thereby realizing the investigation of the closing performance of the direct current breaker and the overall control protection unit of the breaker. And after the test article is closed, the test device transfers the test current back to the auxiliary through-current branch of the power electronic module.
Before testing, the hybrid high-voltage direct-current circuit breaker is connected into a testing circuit, a proper testing inductor is selected, then the low-voltage large current source and the auxiliary through-current branch circuit are electrified, and the current is adjusted to a rated current value; after the current is stable, triggering a transfer branch of the hybrid high-voltage direct-current circuit breaker, simultaneously locking an auxiliary through-current branch, and converting the current to a test sample, namely the hybrid high-voltage direct-current circuit breaker; the circuit breaker completes closing and opening actions according to an internal control time sequence, so that the closing and opening performance of the direct-current circuit breaker and the investigation of the whole control protection unit of the circuit breaker are realized; after the closing operation is finished, the test device transfers the test current back to the auxiliary through-current branch; and closing the low-voltage large current source, and ending the test after the current of the test circuit is reduced to zero.
The invention adopts an auxiliary through-current branch consisting of a low-voltage large current source and a power electronic module to generate continuous and stable test current, and then the current provided by the continuous operation test circuit is converted to a test product, namely the hybrid high-voltage direct-current circuit breaker. The breaker completes the closing action, thereby realizing the investigation of the closing performance of the direct current breaker and the overall control protection unit of the breaker. And after the test article is closed, the test device transfers the test current back to the auxiliary through-current branch of the power electronic module. Therefore, the invention can solve the problems that the hybrid high-voltage direct-current circuit breaker has high requirements on the voltage and the current of the test equipment and has high realization difficulty.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A test method for a hybrid high voltage direct current breaker, characterized by the steps comprising:
firstly, a test circuit is built, wherein the test circuit comprises: the low-voltage large current source, the test inductor, the protection branch and the auxiliary through-current branch are connected; after the protection branch circuit and the auxiliary through-current branch circuit are connected with the hybrid high-voltage direct-current circuit breaker in parallel, the protection branch circuit and the auxiliary through-current branch circuit are connected with the low-voltage large current source through the test inductor;
secondly, starting the low-voltage large current source, and providing continuous and stable test current for the hybrid high-voltage direct-current circuit breaker and the auxiliary through-current branch;
thirdly, the auxiliary through-current branch receives the test current, and is locked after the test current is stable so as to inject high-voltage test current into the hybrid high-voltage direct-current circuit breaker, complete the current conversion of the hybrid high-voltage direct-current circuit breaker and then be locked;
fourthly, the hybrid high-voltage direct-current circuit breaker is triggered by the high-voltage experimental current and reliably contacted so as to complete closing operation according to the control time sequence in the hybrid high-voltage direct-current circuit breaker during the locking period of the auxiliary through-current branch circuit;
fifthly, the auxiliary through-current branch receives the test current converted back by the hybrid high-voltage direct-current circuit breaker after the switching-on and switching-off operation of the hybrid high-voltage direct-current circuit breaker is completed;
in the above steps, the protection branch circuit always detects the voltage of a sampling point of the hybrid high-voltage direct-current circuit breaker to perform overvoltage protection on the hybrid high-voltage direct-current circuit breaker; the test inductor generates an induced potential when the test current fluctuates to counteract the fluctuation of the test current;
in the test circuit built in the first step, the auxiliary through-current branch consists of an IGBT device and an energy storage element;
in the test circuit built in the first step, the stray inductance of the energy storage element is lower than 50nH; in the test circuit built in the first step, the auxiliary through-current branch comprises at least one pair of auxiliary through-current valves connected in parallel;
in the test circuit built in the first step, each auxiliary flow through valve comprises at least two groups of unit circuits, and each group of unit circuits are connected in parallel to two ends of the protection branch circuit;
each set of the cell circuits includes: 4 IGBT devices and 1 capacitor;
the emitter of the first IGBT device is connected with the first pin of the capacitor and the emitter of the second IGBT device, the collector of the first IGBT device is connected with the emitter of the fourth IGBT device, the collector of the fourth IGBT device is simultaneously connected with the collector of the third IGBT device and the second pin of the capacitor, the emitter of the third IGBT device is connected with the collector of the second IGBT device, and a switching element is further connected in series between the emitter of the third IGBT device and the emitter of the fourth IGBT device and used for controlling the flowing state of current in the auxiliary through-flow branch circuit.
2. Test method for a hybrid high voltage direct current breaker according to claim 1, characterized in that in the test circuit built in the first step, the low voltage large current source is formed by a thyristor rectifier.
3. The test method for the hybrid high-voltage direct-current circuit breaker according to claim 1, wherein in the test circuit built in the first step, the energy storage element in the auxiliary current branch is a double-layer metallized film capacitor or a polypropylene non-polar capacitor.
4. The test method for the hybrid high-voltage direct-current circuit breaker according to any one of claims 1 to 3, wherein in the test circuit built in the first step, a thyristor is connected in series with the low-voltage large current source and the test inductor through a positive electrode and a negative electrode of the thyristor, a gate stage of the thyristor is connected with an overvoltage judgment loop, the overvoltage judgment loop compares the obtained sampling voltage with a reference voltage input to the overvoltage judgment loop, and when the sampling voltage is greater than the reference voltage, a control signal is output to the gate stage of the thyristor to switch the protection branch to a protection state.
5. Test method for a hybrid hvdc circuit breaker according to claim 1, wherein said first step is implemented to build a test circuit in which the maximum repeatable peak current of the collector of each IGBT device in said auxiliary current passing valve is at least as high as the rated current of said hybrid hvdc circuit breaker.
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| CN108957303B (en) * | 2017-05-26 | 2020-08-25 | 许继电气股份有限公司 | High-voltage direct-current breaker current tolerance test loop and method |
| CN117192354B (en) * | 2023-11-01 | 2024-01-23 | 华北电力科学研究院有限责任公司 | Hybrid high-voltage direct-current breaker test loop, method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129033A (en) * | 2010-12-23 | 2011-07-20 | 中国西电电气股份有限公司 | Test loop used for direct-current switch test |
| CN203894385U (en) * | 2014-06-20 | 2014-10-22 | 中国船舶重工集团公司第七一二研究所 | Circuit breaker arc voltage characteristic testing device |
| CN105807214A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Breaking test device and test method for high-voltage direct current breaker |
| CN107664745A (en) * | 2017-08-18 | 2018-02-06 | 全球能源互联网研究院有限公司 | A kind of dc circuit breaker testing equipment |
| CN107728048A (en) * | 2017-09-05 | 2018-02-23 | 许继电气股份有限公司 | A kind of mixed type high voltage DC breaker pilot system |
| KR20180111161A (en) * | 2017-03-31 | 2018-10-11 | 엘에스산전 주식회사 | Dc circuit breaker having an arc blow-out device |
-
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- 2019-04-30 CN CN201910358269.XA patent/CN110244217B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129033A (en) * | 2010-12-23 | 2011-07-20 | 中国西电电气股份有限公司 | Test loop used for direct-current switch test |
| CN203894385U (en) * | 2014-06-20 | 2014-10-22 | 中国船舶重工集团公司第七一二研究所 | Circuit breaker arc voltage characteristic testing device |
| CN105807214A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Breaking test device and test method for high-voltage direct current breaker |
| KR20180111161A (en) * | 2017-03-31 | 2018-10-11 | 엘에스산전 주식회사 | Dc circuit breaker having an arc blow-out device |
| CN107664745A (en) * | 2017-08-18 | 2018-02-06 | 全球能源互联网研究院有限公司 | A kind of dc circuit breaker testing equipment |
| CN107728048A (en) * | 2017-09-05 | 2018-02-23 | 许继电气股份有限公司 | A kind of mixed type high voltage DC breaker pilot system |
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