CN108226645A - A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device - Google Patents

A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device Download PDF

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Publication number
CN108226645A
CN108226645A CN201810004602.2A CN201810004602A CN108226645A CN 108226645 A CN108226645 A CN 108226645A CN 201810004602 A CN201810004602 A CN 201810004602A CN 108226645 A CN108226645 A CN 108226645A
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CN
China
Prior art keywords
voltage
resistance
switching
measurement module
shut brake
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.)
Pending
Application number
CN201810004602.2A
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Chinese (zh)
Inventor
孙宝法
徐克成
孙博宇
郝杰
徐宁
徐宁一
李秀磊
赵泽豪
张泽锋
陆晓波
丁健
张荣伟
徐东伟
徐湉湉
田小川
亓信平
韩毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NINGBO TRANSMISSION & DISTRIBUTION CONSTRUCTION Co Ltd
Original Assignee
NINGBO TRANSMISSION & DISTRIBUTION CONSTRUCTION Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by NINGBO TRANSMISSION & DISTRIBUTION CONSTRUCTION Co Ltd filed Critical NINGBO TRANSMISSION & DISTRIBUTION CONSTRUCTION Co Ltd
Priority to CN201810004602.2A priority Critical patent/CN108226645A/en
Publication of CN108226645A publication Critical patent/CN108226645A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08Measuring resistance by measuring both voltage and current

Abstract

The present invention relates to power test technical field, particularly a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device, including direct voltage output module, electrical quantities measurement module, computing module;Direct voltage output module:DC pulse square-wave voltage is exported, switching on and off wire loop is connected;Electrical quantities measurement module:For detecting the voltage waveform in switching on and off wire loop between aviation insert row two-terminal, auxiliary resistance R0Current waveform in the voltage waveform at both ends and switching on and off wire loop;Computing module:The electrical quantity numerical computations switching on and off coil DC resistance detected according to electrical quantities measurement module.With the above structure, it rapidly and accurately measure coil in the conduction time that can be set at the time relay and directly hinder, can be effectively prevented from can not obtaining real-time electrical quantity this defect in switch divide-shut brake transient process, applicable performance is obviously improved.

Description

A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device
Technical field
The present invention relates to power test technical field, particularly a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent Device.
Background technology
Vacuum circuit breaker switching on and off coil is close with the action message of breaker as the important component in division, lock circuit Cut phase is closed.It, will if high-pressure vacuum breaker misaction occurs due to sub-gate circuit failure when accident occurs for electric system Separating brake of bypassing the immediate leadership is caused, seriously expands accident, causes large-area power-cuts.And when closing circuit failure leads to breaker can not can closing During lock, it will make circuit that can not restore electricity, seriously affect power supply reliability.Switching on and off coil D.C. resistance as the component most Important electric parameter decides the working performance of switching on and off buckle releaser.It therefore, will in vacuum circuit breaker commissioning test standard Necessary Accurate Determining switching on and off coil D.C. resistance is sought, only suitable divide-shut brake coil D.C. resistance just can guarantee breaker Normal reliable works.
Traditional testing scheme is that 10kV vacuum circuit breaker divide-shut brake coil D.C. resistances are surveyed using " directly surveying method " Examination that is, by dismantling circuit breaker panel, disassembles out the outlet terminal of switching on and off coil, then utilizes general-purpose by outlet terminal The direct measuring coil resistance of table.Utilize " directly surveying method " test coil D.C. resistance, one side testing efficiency is low, required time into This and labour cost are higher;Another aspect this method smaller scope of application is only applicable to the coil of the detachable breaker of cover board D.C. resistance is tested.Many vacuum circuit breaker voltage class of substation are 35kV at present, this voltage class breaker cover board is Measure the outlet terminal that switching on and off coil can not be also disassembled out after dismounting cover board, therefore " directly survey method " entirely without Method is applicable in.High-pressure vacuum breaker switching on and off coil electric schematic diagram is as illustrated in figs. 1A and ib.Based on the electrical schematic diagram point It is found that rectifier bridge existing for wire loop can influence the conduction status of entire measuring loop, the conduction voltage drop of diode can shadow for analysis Coil D.C. resistance test result is rung, and due to existence time relay in entire circuit, the conduction time of limitation is in 250ms Left and right more than cutting off power circuit immediately after the time, obtains coil resistance and is so how to be measured within the extremely short time A big difficulty.
Invention content
The technical problem to be solved in the invention is to provide a kind of accurate, efficient and reliable vacuum circuit breaker D.C. resistance Measuring device.
In order to solve the above technical problems, a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device of the present invention, Including direct voltage output module, electrical quantities measurement module, computing module;
Direct voltage output module:DC pulse square-wave voltage is exported, switching on and off wire loop is connected;
Electrical quantities measurement module:It is auxiliary for detecting the voltage waveform in switching on and off wire loop between aviation insert row two-terminal Help resistance R0Current waveform in the voltage waveform at both ends and switching on and off wire loop;
Computing module:The electrical quantity numerical computations switching on and off coil D.C. resistance detected according to electrical quantities measurement module Value.
Further, the electrical quantities measurement module includes measuring, record and showing electricity between aviation plug two-terminal The voltage measurement module B of corrugating1, for measuring, recording and showing auxiliary resistance R0The voltage measurement mould of the voltage waveform at both ends Block B2, for measure, record and show divide-shut brake wire loop conducting after current waveform current measurement module B3
Further, the auxiliary resistance R0With five grades of resistance values of different sizes for switching, one grade of resistance value For R0_1, the resistance value of second gear is R0_2, the resistance value of third gear is R0_3, the resistance value of fourth speed is R0_4, the electricity of fifth speed Resistance value is R0_5, the switching of resistance value realized by external selecting switch.
Further, during carrying out resistance value adjusting by external selecting switch, while voltage measurement module B is observed1 With voltage measurement module B2The ratio between shown real-time voltage, the two voltage magnitude is close to 20:1;For 35kV switchgears, The ratio between the two voltage magnitude is close to 25:1.
Further, the direct voltage output module exports pulsatile once direct current square-wave voltage every time △ t, it is assumed that The adjacent amplitude of test voltage twice is respectively Ui1、Ui2, difference in magnitude should meet:Ui2-Ui1≥5V。
With the above structure, the present invention can be realized tests inside points under the mode for not dismantling vacuum circuit breaker Closing coil D.C. resistance, therefore the present apparatus has good compatibility to 10kV and 35kV vacuum circuit breakers;The present apparatus can Effectively eliminate the adverse effect that diode conduction voltage drop is generated to directly hindering measurement result in sub-switch circuit;The present apparatus can when Between rapidly and accurately measure coil and directly hinder in conduction time for setting of relay, switch divide-shut brake transient state can be effectively prevented from Real-time electrical quantity this defect can not be obtained in the process, and applicable performance is obviously improved.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 a are closing circuit electrical schematic diagram.
Fig. 1 b are sub-gate circuit electrical schematic diagram.
Fig. 2 is vacuum circuit breaker divide-shut brake coil motion simplified pinciple figure.
Fig. 3 is D.C. resistance device measurement module key wiring diagram.
Fig. 4 is auxiliary electric resistance structure figure.
Fig. 5 a are switching winding D.C. resistance of the present invention test experiment aviation insert row terminal voltage oscillograph signal for the first time Figure.
Fig. 5 b test the signal of first time experimental standard resistance both end voltage oscillograph for switching winding D.C. resistance of the present invention Figure.
Fig. 5 c are second of experiment aviation insert row terminal voltage oscillograph signal of switching winding D.C. resistance of the present invention test Figure.
Fig. 5 d test second of experimental standard resistance both end voltage oscillograph signal for switching winding D.C. resistance of the present invention Figure.
Fig. 5 e are switching winding D.C. resistance of the present invention test third time experiment aviation insert row terminal voltage oscillograph signal Figure.
Fig. 5 f test the signal of third time experimental standard resistance both end voltage oscillograph for switching winding D.C. resistance of the present invention Figure.
Specific embodiment
When as illustrated in figs. 1A and ib, for test switching winding D.C. resistance, test connection is connected in aviation insert row Terminal for terminal 31 and terminal 30, and institute's making alive is positive polarity on terminal 31, and institute's making alive is negative polarity on terminal 30;It is right When closing coil D.C. resistance is tested, terminal that test connection is connected in aviation insert row is terminal 4 and terminal 14, and terminal Institute's making alive is positive polarity on 14, and institute's making alive is negative polarity on terminal 4.
As shown in Fig. 2, for sub-gate circuit, during work, divide-shut brake location assistance switch is closed state;For closing a floodgate Circuit, during work, closing locking limit switch is closed state with divide-shut brake location assistance switch;It is led since coil is in During logical state, all switches are in closed state in DC loop, all switches are omitted, the vacuum circuit breaker after being simplified Device switching on and off operating principle process.Making process is similar to separating brake process, is from insert row terminal input ac voltage, passes through Commutating circuit completes AC-DC conversion, and the DC current of output reaches coil motion value, completes switching on and off operation.Due to conducting When coil it is larger by electric current, coil burnout, can add in the time relay in order to prevent, and turn-on time reaches setting value (about In 250ms or so) when, circuit disconnects, coil losing electricity.Rectifying part is substantially a single-phase bridge full-wave rectifying circuit.
As shown in figure 3, a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device of the present invention, including direct current Press output module, electrical quantities measurement module, computing module;
Direct voltage output module:DC pulse square-wave voltage is exported, switching on and off wire loop is connected.Its amplitude is adjusted Ranging from 0-50V, duration adjustable range are 0-400ms.Pulsatile once direct current square-wave voltage is exported every time △ t, it is false If the adjacent amplitude of test voltage twice is respectively Ui1、Ui2, difference in magnitude should meet:Ui2-Ui1≥5V。
Electrical quantities measurement module:It is auxiliary for detecting the voltage waveform in switching on and off wire loop between aviation insert row two-terminal Help resistance R0Current waveform in the voltage waveform at both ends and switching on and off wire loop.Wherein, the electrical quantities measurement module packet Include the voltage measurement module B for measuring, recording and showing voltage waveform between aviation plug two-terminal1, for measuring, record and Show auxiliary resistance R0The voltage measurement module B of the voltage waveform at both ends2, for measuring, recording and showing divide-shut brake wire loop The current measurement module B of current waveform after conducting3
Computing module:The electrical quantity numerical computations switching on and off coil D.C. resistance detected according to electrical quantities measurement module Value.
The operation principle of the present invention is as follows:It is U to be primarily based on direct voltage output module and export an amplitudeA1Direct current arteries and veins Square-wave voltage is rushed, for switching on and off wire loop, voltage measurement module B to be connected1It measures between aviation plug two-terminal as UHK1, electricity Press measurement module B2Auxiliary resistance both end voltage is measured as UR1, current measurement module B3The loop current measured is I1;Through super-interval After time △ t=5s, an amplitude is exported as U by sub- direct voltage output module againA2DC pulse square-wave voltage, be based on Voltage measurement module B1, voltage measurement module B2, current measurement module B3The electrical quantity measured is respectively UHK2,UR2And I2;It passes through again After super-interval time △ t=5s, it is U to export an amplitude by sub- direct voltage output module third timeA3DC pulse square wave Voltage, based on voltage measurement module B1, voltage measurement module B2, current measurement module B3The electrical quantity measured is respectively UHK3,UR3 And I3Switching on and off coil DC resistance R is calculated based on formula (1) by module CLAnd carry out real-time display.
Specifically, the present invention realizes resistance adjustment function using auxiliary resistance regulating device, which is characterized in that auxiliary electricity The resistance value of resistance can be adjusted based on exterior panel button operation.Ensured by adjusting resistance values by electrical quantities measurement module The electrical quantity of measurement meets set index, avoids extraneous Spurious noise that from being generated to the recording effect of electrical quantities measurement module larger It influences.
Specifically, during carrying out resistance value adjusting based on exterior panel, while voltage measurement module B is observed1It is surveyed with voltage Measure module B2Shown real-time voltage, for 10kV switchgears, the ratio between the two voltage magnitude is close to 20:1;For 35kV For switchgear, the ratio between the two voltage magnitude is close to 25:1.
Embodiment one:
By taking 110kV Bai Yue substations of Ningbo City 10kV vacuum circuit breakers as an example, divide-shut brake coil designed by the invention Direct current resistance m easurem ent device to test corresponds to coil D.C. resistance resistance value when breaker is in "on" position.Direct voltage output mould Block uses switch DC voltage generator, and electrical quantities measurement module uses FULUKE oscilloscope modules, as shown in figure 4, auxiliary electricity Five grades of resistance values of resistance are respectively R0_1=0.49 Ω, R0_2=0.99 Ω, R0_3=1.49 Ω, R0_4=1.99 Ω, R0_5=2.49 Ω。
Be operated first breaker and be at gate-dividing state, spring energy-storage state and close a floodgate it is non-latching, based on DC voltage It is 28V, 38V, 43V that output module applies amplitude between aviation terminal 4 and 14 respectively, and the duration is the direct current arteries and veins of 400ms Rush voltage, i.e. UA1=28V, UA2=38V, UA3=43V;Extraneous resistance R is adjusted based on submodule0, make aviation plug and auxiliary Resistance both end voltage is helped to meet set index, by practical adjustments, auxiliary resistance value selected as R0=1.49 Ω;Obtain electricity simultaneously The voltage of tolerance measurement module, current recording amount, respective electric amount recording waveform is as shown in attached drawing 5a- Fig. 5 f, and test data is such as Shown in table 1:
1. closing coil test data of table
It by the data tested twice, can be calculated using formula (1), the calculated value of closing coil resistance is 33.2 Ω, and real Actual value be 33.0 Ω, error degree 0.6%, error permission in the range of.
Although specific embodiments of the present invention have been described above, those skilled in the art should be appreciated that this It is merely illustrative of, various changes or modifications can be made to present embodiment, without departing from the principle and substance of the present invention, Protection scope of the present invention is only limited by the claims that follow.

Claims (5)

1. a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device, it is characterised in that:Including direct voltage output mould Block, electrical quantities measurement module, computing module;
Direct voltage output module:DC pulse square-wave voltage is exported, switching on and off wire loop is connected;
Electrical quantities measurement module:For detecting the voltage waveform in switching on and off wire loop between aviation insert row two-terminal, auxiliary electricity Hinder R0Current waveform in the voltage waveform at both ends and switching on and off wire loop;
Computing module:The electrical quantity numerical computations switching on and off coil DC resistance detected according to electrical quantities measurement module.
2. a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device described in accordance with the claim 1, it is characterised in that: The electrical quantities measurement module includes the voltage measurement mould for being used for measuring, record and showing voltage waveform between aviation plug two-terminal Block B1, for measuring, recording and showing auxiliary resistance R0The voltage measurement module B of the voltage waveform at both ends2, for measuring, recording And show the current measurement module B of current waveform after the conducting of divide-shut brake wire loop3
3. a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device described in accordance with the claim 1, it is characterised in that: The auxiliary resistance R0With five grades of resistance values of different sizes for switching, first grade of resistance value is R0_1, the electricity of second gear Resistance value is R0_2, the resistance value of third gear is R0_3, the resistance value of fourth speed is R0_4, the resistance value of fifth speed is R0_5, resistance value Switching realized by external selecting switch.
4. a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device described in accordance with the claim 3, it is characterised in that: During carrying out resistance value adjusting by external selecting switch, while observe voltage measurement module B1With voltage measurement module B2It shows Show the ratio between real-time voltage, the two voltage magnitude close to 20:1;For 35kV switchgears, the ratio between the two voltage magnitude is close In 25:1.
5. a kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device described in accordance with the claim 1, it is characterised in that: The direct voltage output module exports pulsatile once direct current square-wave voltage every time △ t, it is assumed that adjacent test voltage twice Amplitude is respectively Ui1、Ui2, difference in magnitude should meet:Ui2-Ui1≥5V。
CN201810004602.2A 2018-01-03 2018-01-03 A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device Pending CN108226645A (en)

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CN201810004602.2A CN108226645A (en) 2018-01-03 2018-01-03 A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device

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CN201810004602.2A CN108226645A (en) 2018-01-03 2018-01-03 A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109799390A (en) * 2018-12-29 2019-05-24 国网浙江建德市供电有限公司 A kind of breaking-closing operating coil D.C. resistance intelligent device for measuring
CN111366787A (en) * 2020-03-22 2020-07-03 广西电网有限责任公司电力科学研究院 Method and equipment for testing direct current resistance of capacitor discharge coil
CN113049951A (en) * 2021-05-19 2021-06-29 广东电网有限责任公司 Breaker mechanism state analysis device and method

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CN102033195A (en) * 2009-09-27 2011-04-27 湖北省电力试验研究院 Device and method for measuring dynamic resistance of high-voltage circuit breaker
CN105388362A (en) * 2015-11-25 2016-03-09 国家电网公司 Breaker switch direct current resistance measuring device
CN206684228U (en) * 2017-03-20 2017-11-28 国网浙江省电力公司嘉兴供电公司 A kind of high-voltage circuit-breaker switching on-off coil resistance universal test device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109799390A (en) * 2018-12-29 2019-05-24 国网浙江建德市供电有限公司 A kind of breaking-closing operating coil D.C. resistance intelligent device for measuring
CN111366787A (en) * 2020-03-22 2020-07-03 广西电网有限责任公司电力科学研究院 Method and equipment for testing direct current resistance of capacitor discharge coil
CN111366787B (en) * 2020-03-22 2022-07-12 广西电网有限责任公司电力科学研究院 Method and equipment for testing direct current resistance of capacitor discharge coil
CN113049951A (en) * 2021-05-19 2021-06-29 广东电网有限责任公司 Breaker mechanism state analysis device and method

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Application publication date: 20180629

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