CN110376512B - Direct-current high-speed switch direct-current air-charge current breaking test loop - Google Patents
Direct-current high-speed switch direct-current air-charge current breaking test loop Download PDFInfo
- Publication number
- CN110376512B CN110376512B CN201910620710.7A CN201910620710A CN110376512B CN 110376512 B CN110376512 B CN 110376512B CN 201910620710 A CN201910620710 A CN 201910620710A CN 110376512 B CN110376512 B CN 110376512B
- Authority
- CN
- China
- Prior art keywords
- current
- breaker
- direct
- auxiliary
- loop
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 239000003990 capacitor Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims description 7
- 238000012806 monitoring device Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 230000002238 attenuated effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a direct-current high-speed switch direct-current empty charging current breaking test loop which comprises a first auxiliary breaker, a second auxiliary breaker, a capacitor bank, a resistor, an ammeter, a first voltmeter, a second voltmeter and a direct-current high-voltage generator, wherein the first auxiliary breaker is connected with the first voltmeter; the direct-current high-voltage generator, the second auxiliary breaker and the capacitor bank are connected in series to form a loop; the capacitor bank, the resistor and the second voltmeter are connected in series to form a loop; one end of the first auxiliary breaker is connected with the resistor, and the other end of the first auxiliary breaker is connected with one end of the tested breaker; one end of the first voltmeter is connected to a circuit between the first auxiliary circuit breaker and the tested circuit breaker, and the other end of the first voltmeter is connected to a connecting circuit between the second voltmeter and the capacitor bank. The direct-current high-speed switch direct-current charging current breaking test loop can test and check the capability of a circuit breaker for breaking a long-distance high-voltage direct-current line charging current.
Description
Technical Field
The invention relates to a test loop, in particular to a direct-current high-speed switch direct-current charging current switching test loop.
Background
The direct-current high-speed switch (HIGH SPEED SWITCH, HSS) is mainly applied to the multi-terminal flexible direct-current transmission system. The purpose of configuring the direct current high-speed switch is to realize the online switching of a third station of the direct current system and the high-speed isolation of the fault of the direct current circuit, and improve the reliability and the availability of the whole direct current system.
The direct current high-speed switch generally adopts an open column type breaker type, an operating mechanism can adopt hydraulic pressure or springs, and in order to cooperate with the multi-terminal system for coordinated control, the on-line input and the on-line exit of a sending terminal and a receiving terminal are realized, the cooperation requirement on key performance parameters of equipment is very high, and the direct current high-speed switch mainly has the following characteristics:
(1) Should have an inherent long term overload capacity (at the highest ring temperature) of not less than 1.05p.u. system rated delivery capacity;
(2) The device has stronger direct current arcing tolerance capability;
(3) The capacity of transferring the direct current line charging current is provided;
(4) Has high opening speed and reliable mechanical action characteristics, and does not generate refusal action or false action.
Therefore, before the HSS is applied, the overall key performance of the HSS needs to be tested and evaluated, and in particular, whether the HSS has the capability of transferring the dc line charging current needs to be tested and evaluated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a direct-current high-speed switch direct-current charging current switching-off test loop so as to test and check the capability of the direct-current line charging current of the HSS.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
A direct-current high-speed switch direct-current empty charging current breaking test loop comprises a first auxiliary breaker, a second auxiliary breaker, a capacitor bank, a resistor, an ammeter, a first voltmeter, a second voltmeter and a direct-current high-voltage generator; wherein,
The direct current high-voltage generator, the second auxiliary breaker and the capacitor bank are connected in series to form a loop;
The capacitor bank, the resistor and the second voltmeter are connected in series to form a loop;
One end of the first auxiliary breaker is connected with the resistor, and the other end of the first auxiliary breaker is connected with one end of the tested breaker;
one end of the first voltmeter is connected to a circuit between the first auxiliary circuit breaker and the tested circuit breaker, and the other end of the first voltmeter is connected to a connecting circuit between the second voltmeter and the capacitor bank;
One end of the ammeter is connected with the other end of the tested breaker, and the other end of the ammeter is grounded and connected to a circuit connected with the second voltmeter and the capacitor bank.
The direct-current high-speed switch direct-current charging current breaking test loop also comprises a mechanical characteristic monitoring device, wherein the mechanical characteristic monitoring device is used for acquiring a time-contact speed and a time-contact travel curve of the tested breaker T0 when the breaker is opened.
Compared with the prior art, the invention has the beneficial effects that:
the direct-current high-speed switch direct-current charging current breaking test loop can test and check the capability of a circuit breaker for breaking a long-distance high-voltage direct-current line charging current.
Drawings
Fig. 1 is a circuit diagram of a dc high-speed switch dc null charge current turn-on/off test loop provided by an embodiment of the present invention;
Fig. 2 is a timing diagram of the operation of the circuit breaker.
Detailed Description
The present invention will be described in further detail with reference to the drawings and detailed description.
Examples:
As shown in figure 1 of the drawings, the direct-current high-speed switch direct-current charging current breaking test circuit provided by the embodiment comprises a first auxiliary breaker AB1, a second auxiliary breaker AB2, a capacitor bank C, a resistor R, an ammeter A, a first voltmeter V1, a second voltmeter V2 and a direct-current high-voltage generator DC.
The direct-current high-voltage generator DC, the second auxiliary breaker AB2 and the capacitor bank C are connected in series to form a loop; the capacitor group C, the resistor R and the second voltmeter V2 are connected in series to form a loop; one end of the first auxiliary breaker AB1 is connected with the resistor R, and the other end of the first auxiliary breaker AB1 is connected with one end of the tested breaker T0; one end of the first voltmeter V1 is connected to a circuit between the first auxiliary breaker AB1 and the tested breaker T0, and the other end of the first voltmeter V1 is connected to a connecting circuit between the second voltmeter V2 and the capacitor bank C; one end of the ammeter A is used for being connected with the other end of the tested breaker T0, and the other end of the ammeter A is grounded and connected to a circuit connected with the second voltmeter V2 and the capacitor bank C.
Therefore, the capacity of the circuit breaker for switching on and off the long-distance high-voltage direct-current line charging current can be verified through the equivalent simulation loop.
In the initial state, the first auxiliary breaker AB1 and the second auxiliary breaker AB2 are in a switching-off state, the tested breaker T0 is in a switching-on state, and the direct current high voltage generator DC can output direct current high voltage to the capacitor bank C to a specified value.
Specifically, when the direct-current high-speed switch direct-current empty charging current breaking test loop is tested, the method comprises the following steps:
1) Configuration of test loop parameters
Obtaining a resistor R=U/I according to the direct current I and the recovery voltage U of the test target;
The capacitor bank is configured to mainly determine the capacitance C of the capacitor bank and the internal resistance R C of the capacitor bank, and since the capacitor bank is charged and the pre-charged capacitor bank and the resistive load are used to form a dc current loop, the parameters of the capacitor can be obtained according to the following formula.
I＝(U+IRC)ωC
The interval time T1 between the auxiliary circuit breaker AB2 and the auxiliary circuit breaker AB1, the interval time T2 between the auxiliary circuit breaker AB1 and the tested circuit breaker T0, the time T for the current to decay to I after the test circuit is conducted, otherwise, the current of the tested circuit breaker is smaller than the required value I, the whole time constant of the specific circuit is determined, and the specific time constant can be obtained by the following formula.
The voltage class and the range of the ammeter A and the voltmeters V1 and V2 should be higher than the test requirement value.
2) Capacitor bank energy storage
The auxiliary breaker AB2 is switched on, the direct current high voltage generator DC charges and stores energy to the capacitor bank, and after the energy reaches more than U+IR C, the auxiliary breaker AB2 is switched off.
3) Capacitor bank discharge
After the delay of the T1 operation interval time, the auxiliary breaker AB1 is switched on, the test loop is conducted and is influenced by the RC circuit, the loop current has a certain attenuation amplitude, and before the loop current is attenuated to the test current I, the tested breaker T0 is switched off after the delay of the T2 operation interval time.
4) Switching on and off the direct current
In the opening process of the breaker T0, a direct current arc can be generated at a switch fracture, and the direct current arc can be equivalent to a dynamic resistor; along with the brake separating process, the distance between the movable arc contact and the static arc contact is gradually increased, the direct current arc resistance is gradually increased, the voltage at two ends of the switch is also gradually increased, and the loop current is gradually reduced; when the current is small to some extent, the arc burning is difficult to maintain and the arc extinguishes. At this point the T3 arcing time is recorded. The product of the required T3 arcing time and the average opening speed v of the breaker must be smaller than the design opening distance L of the contacts, otherwise, the opening movement is stopped, the direct current arc cannot be extinguished, and the breaking failure is caused.
5) Test criterion
The initial state of the test sample is a closing position, a loop is connected by a loop auxiliary switch, then the test sample is opened at the through-current time T2, the test sample normally opens the test current I after the arcing time T3, and after the opening, the arcing contact can withstand the recovery voltage U without re-breakdown.
The positive and negative polarities were tested 10 times each.
The test article (namely the tested breaker) completes the specified number m of times of switching off the direct current charging current with positive and negative polarities, and can be judged to pass the test.
Therefore, the direct-current high-speed switch direct-current charging current breaking test loop can be used for conducting positive and negative direct-current charging current breaking tests on the circuit breaker so as to verify whether the circuit breaker meets the performance requirement of transferring direct-current line charging current.
As the direct current high-speed switch provided in the embodiment one preferred option for a current-to-air charge current-to-break test loop, the test loop also comprises a mechanical characteristic monitoring device for taking the time-contact speed and time-contact travel curve of the tested breaker T0 when the breaker is opened. The operating sequence of the circuit breaker is as follows:
A2- -O (open state) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
AB 1- -O (open state) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
The method comprises the steps of
As particularly shown in fig. 2.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. The direct-current high-speed switch direct-current empty charging current breaking test loop is characterized by comprising a first auxiliary breaker, a second auxiliary breaker, a capacitor bank, a resistor, an ammeter, a first voltmeter, a second voltmeter and a direct-current high-voltage generator; wherein,
The direct current high-voltage generator, the second auxiliary breaker and the capacitor bank are connected in series to form a loop;
The capacitor bank, the resistor and the second voltmeter are connected in series to form a loop;
One end of the first auxiliary breaker is connected with the resistor, and the other end of the first auxiliary breaker is connected with one end of the tested breaker;
one end of the first voltmeter is connected to a circuit between the first auxiliary circuit breaker and the tested circuit breaker, and the other end of the first voltmeter is connected to a connecting circuit between the second voltmeter and the capacitor bank;
one end of the ammeter is connected with the other end of the tested breaker, and the other end of the ammeter is grounded and connected to a circuit connected with the second voltmeter and the capacitor bank;
In the initial state, the first auxiliary breaker and the second auxiliary breaker are in a breaking state, the tested breaker is in a closing state, and the direct current high voltage generator outputs direct current high voltage to the capacitor bank to a specified value;
When the direct-current high-speed switch direct-current empty charging current breaking test loop is tested, the method comprises the following steps:
1) Configuration of test loop parameters
Obtaining a resistor R=U/I according to the direct current I and the recovery voltage U of the test target;
the capacitor bank is configured, the capacitance C of the capacitor bank is mainly determined, the internal resistance R C of the capacitor bank is determined, and the parameters of the capacitor are obtained according to the following formula:
I＝(U+IRC)ωC
The interval time T1 of the cooperation operation of the second auxiliary circuit breaker and the first auxiliary circuit breaker, the interval time T2 of the cooperation operation of the first auxiliary circuit breaker and the tested circuit breaker are required to be not longer than the time T of the current decay to I after the conduction of the test loop, otherwise, the current of the tested circuit breaker is smaller than the required value I, and the time T is obtained by the following formula:
the voltage class and the measuring range of the ammeter, the first voltmeter and the second voltmeter are higher than the test requirement value;
2) Capacitor bank energy storage
The second auxiliary breaker is switched on, the direct-current high-voltage generator charges and stores energy in the capacitor bank, and after the energy reaches more than U+IR C, the second auxiliary breaker is switched off;
3) Capacitor bank discharge
After the delay of the T1 operation interval time, the first auxiliary breaker is switched on, the test loop is conducted and is influenced by the RC circuit, the loop current has a certain attenuation amplitude, and before the loop current is attenuated to the test current I, the tested breaker is switched off after the delay of the T2 operation interval time;
4) Switching on and off the direct current
In the breaking process of the tested breaker, a direct current arc is generated at a switch fracture, and the direct current arc can be equivalent to a dynamic resistor; along with the brake separating process, the distance between the movable arc contact and the static arc contact is gradually increased, the direct current arc resistance is gradually increased, the voltage at two ends of the switch is also gradually increased, and the loop current is gradually reduced; when the current is small to a certain extent, the arc burning is difficult to maintain, and the arc is extinguished; recording the T3 arcing time at the moment; the product of the required T3 arcing time and the average opening speed v of the breaker must be smaller than the design opening distance L of the contacts, otherwise, the opening movement is stopped, the direct current arc cannot be extinguished, and the failure of opening is caused;
5) Test criterion
The initial state of the tested breaker is a closing position, a loop is closed by a loop auxiliary switch, then a sample is opened at the through-flow time T2, the tested breaker normally opens the test current I after the arcing time T3, and an arcing contact can withstand the recovery voltage U after the opening and the closing, so that the re-breakdown does not occur;
10 tests of positive and negative polarities;
and the tested breaker completes the specified number m of times of switching off the direct current charging current with positive and negative polarities, and judges that the test passes.
2. The direct-current high-speed switch direct-current empty-charge current breaking test loop according to claim 1, further comprising a mechanical characteristic monitoring device, the mechanical characteristic monitoring device is used for acquiring a time-contact speed and a time-contact travel curve when the tested breaker is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620710.7A CN110376512B (en) | 2019-07-10 | 2019-07-10 | Direct-current high-speed switch direct-current air-charge current breaking test loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620710.7A CN110376512B (en) | 2019-07-10 | 2019-07-10 | Direct-current high-speed switch direct-current air-charge current breaking test loop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110376512A CN110376512A (en) | 2019-10-25 |
| CN110376512B true CN110376512B (en) | 2024-04-26 |
Family
ID=68250916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910620710.7A Active CN110376512B (en) | 2019-07-10 | 2019-07-10 | Direct-current high-speed switch direct-current air-charge current breaking test loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110376512B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1210352A (en) * | 1966-10-21 | 1970-10-28 | Reyrolle A & Co Ltd | Improvements relating to the synthetic testing of high-voltage electric circuit-breakers |
| JPH07248362A (en) * | 1994-03-10 | 1995-09-26 | Toshiba Corp | Synthetic breaking test circuit for switch |
| CN101261192A (en) * | 2008-04-24 | 2008-09-10 | 南京因泰莱配电自动化设备有限公司 | 24KV high-voltage vacuum breaker mechanical features on-line monitoring method and monitoring device |
| CN104035025A (en) * | 2014-06-20 | 2014-09-10 | 中国船舶重工集团公司第七一二研究所 | Zero-current mixed switching-off technology testing device and zero-current mixed switching-off technology testing method |
| CN105334453A (en) * | 2015-07-22 | 2016-02-17 | 深圳供电局有限公司 | Method and device for estimating state of SF6 high-voltage circuit breaker |
| 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 |
| WO2017199397A1 (en) * | 2016-05-19 | 2017-11-23 | 三菱電機株式会社 | Testing device and testing method for direct-current circuit breaker |
| CN107482599A (en) * | 2017-09-14 | 2017-12-15 | 南京南瑞继保电气有限公司 | Suppress the breaker control method of DC bias current during a kind of line no-load switching |
| CN109459688A (en) * | 2018-12-03 | 2019-03-12 | 中国电力科学研究院有限公司 | Promote and evaluate the hookup and device of vacuum circuit breaker performance |
| CN109507576A (en) * | 2018-11-20 | 2019-03-22 | 上海思源高压开关有限公司 | A kind of detection device for mechanical dc circuit breaker break performance |
| CN109581210A (en) * | 2018-09-18 | 2019-04-05 | 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 | A kind of arc-chutes arcing contact ablation condition diagnosing assessment system and its method |
| CN210982673U (en) * | 2019-07-10 | 2020-07-10 | 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 | DC high-speed switch DC air charging current on-off test loop |
-
2019
- 2019-07-10 CN CN201910620710.7A patent/CN110376512B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1210352A (en) * | 1966-10-21 | 1970-10-28 | Reyrolle A & Co Ltd | Improvements relating to the synthetic testing of high-voltage electric circuit-breakers |
| JPH07248362A (en) * | 1994-03-10 | 1995-09-26 | Toshiba Corp | Synthetic breaking test circuit for switch |
| CN101261192A (en) * | 2008-04-24 | 2008-09-10 | 南京因泰莱配电自动化设备有限公司 | 24KV high-voltage vacuum breaker mechanical features on-line monitoring method and monitoring device |
| CN104035025A (en) * | 2014-06-20 | 2014-09-10 | 中国船舶重工集团公司第七一二研究所 | Zero-current mixed switching-off technology testing device and zero-current mixed switching-off technology testing method |
| 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 |
| CN105334453A (en) * | 2015-07-22 | 2016-02-17 | 深圳供电局有限公司 | Method and device for estimating state of SF6 high-voltage circuit breaker |
| WO2017199397A1 (en) * | 2016-05-19 | 2017-11-23 | 三菱電機株式会社 | Testing device and testing method for direct-current circuit breaker |
| CN107482599A (en) * | 2017-09-14 | 2017-12-15 | 南京南瑞继保电气有限公司 | Suppress the breaker control method of DC bias current during a kind of line no-load switching |
| CN109581210A (en) * | 2018-09-18 | 2019-04-05 | 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 | A kind of arc-chutes arcing contact ablation condition diagnosing assessment system and its method |
| CN109507576A (en) * | 2018-11-20 | 2019-03-22 | 上海思源高压开关有限公司 | A kind of detection device for mechanical dc circuit breaker break performance |
| CN109459688A (en) * | 2018-12-03 | 2019-03-12 | 中国电力科学研究院有限公司 | Promote and evaluate the hookup and device of vacuum circuit breaker performance |
| CN210982673U (en) * | 2019-07-10 | 2020-07-10 | 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 | DC high-speed switch DC air charging current on-off test loop |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110376512A (en) | 2019-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101728140B (en) | High voltage or ultra-high voltage high-current circuit breaker | |
| CN110376514B (en) | Method for evaluating comprehensive performance of direct-current high-speed switch | |
| CN103346531B (en) | Bidirectional breaking-based mixing type circuit breaker | |
| Jovcic | Series LC DC circuit breaker | |
| CN102288905B (en) | Synthetic closing and opening test circuit used for high-voltage AC (alternating current) circuit breaker | |
| US10756537B2 (en) | Short circuit fault current limiter | |
| CN109254242B (en) | Ablation test loop and method for testing ablation state of arc contact of circuit breaker | |
| US4087664A (en) | Hybrid power circuit breaker | |
| CN110456265A (en) | The detection method of relay in a kind of charging pile | |
| CN201298065Y (en) | An experiment loop for switching super/extra-high voltage circuit breaker capacitive load | |
| CN201282091Y (en) | High voltage and ultra-high voltage high-current circuit breaker | |
| Zaja et al. | Detailed electro‐dynamic model of an ultra‐fast disconnector including the failure mode | |
| CN210982673U (en) | DC high-speed switch DC air charging current on-off test loop | |
| Xia et al. | Investigations on the safe stroke of mechanical HVDC vacuum circuit breaker | |
| CN110376512B (en) | Direct-current high-speed switch direct-current air-charge current breaking test loop | |
| CN108872812B (en) | Low-cost insulation leakage detection circuit and detection method | |
| CN110376515B (en) | DC high-speed switch DC air charging current on-off test method | |
| CN109193879B (en) | Method and device for charging large-scale linear transformer driving source with fault | |
| Liu et al. | A fast LVDC vacuum hybrid circuit breaker: Dielectric recovery and design consideration | |
| CN110244217B (en) | Test method for hybrid high-voltage direct-current circuit breaker | |
| CN108831806B (en) | It is a kind of to control the device of electric current fast transfer, method and system | |
| Xu et al. | Research on Simulation and On-site Inspection Technology of 500kV Mechanical HVDC Circuit Breaker | |
| CN209070082U (en) | A kind of ablation test circuit | |
| Jovcic et al. | Modelling and Comparison of Common Functionalities of HVDC Circuit Breakers | |
| CN101587786A (en) | A kind of switch arc suppression circuit for switch devices and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |