CN103630729B - The primary connection device and method of test 1000kV lightning arrester reference voltage and leakage current - Google Patents
The primary connection device and method of test 1000kV lightning arrester reference voltage and leakage current Download PDFInfo
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Abstract
The invention discloses a kind of primary connection device and method testing 1000kV lightning arrester reference voltage and leakage current, described device comprises industrial computer, communication module, high voltage direct current generator, positive and negative adjustable DC power supply, reometer A1, reometer A2 and relay card extender, wherein industrial computer is by communication module and high voltage direct current generator, positive and negative adjustable DC power supply is connected and carries out data communication, high voltage direct current generator, positive and negative adjustable DC power supply is connected with the relay on relay card extender after connecting with reometer respectively, relay card extender is connected with tested lightning arrester by p-wire.Measuring method of the present invention, easy-to-connect, primary connection can complete the pilot project of all lightning arrester unit, avoids repeatedly changing wiring, shortens the time needing to have a power failure, time saving and energy saving, has a good application prospect.
Description
Technical field
The invention belongs to electric integrated field of measuring technique, be specifically related to a kind of primary connection device and method testing 1000kV lightning arrester reference voltage and leakage current.
Background technology
220kV and above lightning arrester are normally made up of single-phase multi-section serial, and the higher joint number of electric pressure is more, and 1000kV lightning arrester is made up of 5 joint units in series usually.In electric integrated measuring technique, the method for testing of traditional D.C. reference voltage of arrester, the test of leakage DC current is carried out section by section.When measuring the lightning arrester that more piece units in series is formed, needing to measure section by section, causing repetition wiring.And when saving lightning arrester unit on measuring, need dismounting once to go between, thus cause setting up time long, labour intensity is large, and inefficiency, exists higher potential safety hazard.
Summary of the invention
In order to overcome the problems of the prior art, the invention provides a kind of primary connection device and method testing 1000kV lightning arrester reference voltage and leakage current, primary connection can complete the DC reference voltage of all lightning arrester unit and leak DC current test, and effective solution scene repeats to disconnect the problems such as line workload is large.
In order to achieve the above object, the technical solution adopted in the present invention is:
The primary connection device of test 1000kV lightning arrester reference voltage and leakage current, comprise industrial computer, communication module, high voltage direct current generator, positive and negative adjustable DC power supply, reometer A1, reometer A2 and relay card extender, described industrial computer is connected with positive and negative adjustable DC power supply with high voltage direct current generator respectively by communication module, carries out data communication; Be connected with the relay K a on relay card extender after described high voltage direct current generator is in series by cable with reometer A1; Be connected with the relay K b on relay card extender after described positive and negative adjustable DC power supply is in series by cable with reometer A2; Described relay card extender also comprises relay K c in order to ground connection; Described relay card extender is provided with 6 output interfaces and is connected with tested lightning arrester by p-wire.
Aforesaid communication module carries out data communication by photoelectric isolation module and industrial computer, reometer A1, reometer A2, high voltage direct current generator, positive and negative adjustable DC power supply; Described photoelectric isolation module is used in data communication process, converting the electrical signal to light signal and converting light signal to electric signal, and resists electromagnetic interference (EMI); Described communication module is used for carrying out filtering and AD/DA conversion to electric signal.
Aforesaid relay card extender is according to testing requirement by relay K a, and relay K b and relay K c connect from different output interfaces thus be communicated with corresponding p-wire.
Utilize the primary connection device of above-mentioned test 1000kV lightning arrester reference voltage and leakage current to carry out the method for testing, comprise the following steps:
1): 1000kV lightning arrester is made up of 5 joint units in series usually, first the often joint of tested lightning arrester is connected with corresponding p-wire, and p-wire is connected to the output port of relay card extender;
2): test point following three kinds of situations:
2a) the situation of test cell 1 and unit 2,
If the DC reference voltage of test lightning arrester unit 1 and unit 2 and leakage current, relay K a is placed in the output port 1 of relay card extender, relay K b is placed in the output port 2 of relay card extender, relay K c is placed in the output port 6 of relay card extender, regulate the output valve of high voltage direct current generator and positive and negative adjustable DC power supply, measure DC reference voltage and the leakage current of lightning arrester unit 1 and unit 2;
2b) the situation of measuring unit 2 and unit 3, unit 3 and unit 4,
If test lightning arrester unit i(i=2,3) and the DC reference voltage of unit i+1 and leakage current, relay K a is placed in the output port i of relay card extender, relay K b is placed in the output port i+1 of relay card extender, relay K c is placed in the output port i-1 of relay card extender, regulate the output valve of high voltage direct current generator and positive and negative adjustable DC power supply, measure DC reference voltage and the leakage current of lightning arrester unit i and unit i+1;
2c) the situation of measuring unit 4 and unit 5,
If the DC reference voltage of test lightning arrester unit 4 and unit 5 and leakage current, relay K a is placed in the output port 4 of relay card extender, relay K b is placed in the output port 3 of relay card extender, relay K c is placed in the output port 5 of relay card extender, regulate the output valve of high voltage direct current generator and positive and negative adjustable DC power supply, measure DC reference voltage and the leakage current of lightning arrester unit 4 and unit 5.
Aforesaid method of testing, is characterized in that, described situation 2a) and situation 2b), after wiring completes, measure lightning arrester unit i(i=1,2,3) and the DC reference voltage of unit i+1 and the method for leakage current comprise the following steps:
1, high voltage direct current generator and positive and negative adjustable DC power supply is regulated by industrial computer, the current value of reometer A1 is made to be 16mA, simultaneously the current value of reometer A2 is 8mA, and now the voltage of high voltage direct current generator is lightning arrester unit i(i=1,2,3) DC reference voltage when reference current is 8mA; The voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit i+1 when reference current is 8mA;
2, regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit i+1 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit i+1
8mAunder leakage current; Keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit i by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit i
8mAunder leakage current;
The data of described reometer A1 and reometer A2 read by communication module and photoelectric isolation module.
Aforesaid method of testing, described situation 2c) after wiring completes, measure lightning arrester unit 4 and the DC reference voltage of unit 5 and the method for leakage current and comprise the following steps:
1, high voltage direct current generator and positive and negative adjustable DC power supply is regulated by industrial computer, the current value of reometer A1 is made to be 16mA, the current value of reometer A2 is 8mA simultaneously, and now the voltage of high voltage direct current generator is the DC reference voltage of lightning arrester unit 5 when reference current is 8mA; The voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit 4 when reference current is 8mA;
2, regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit 4 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit 4
8mAunder leakage current; Keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit 5 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit 5
8mAunder leakage current;
The data of described reometer A1 and reometer A2 read by communication module and photoelectric isolation module.
The invention has the beneficial effects as follows: primary connection device of the present invention and method of testing, easy-to-connect, primary connection can complete the DC reference voltage of all lightning arrester unit and leak DC current test, do not need to change test connection, the once lead-in wire and the process of the test that do not need to remove joint lightning arrester unit are carried out automatically, avoid repeatedly changing wiring, effective solution scene repeats to disconnect the problems such as line workload is large, reduce experiment work amount, shorten the time needing to have a power failure, time saving and energy saving, there is good application and promotion prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the primary connection device testing lightning arrester reference voltage and leakage current in embodiments of the invention;
Fig. 2 is the communication mode schematic diagram of communication module of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
The DC reference voltage of lightning arrester refers to the DC voltage value of lightning arrester of lightning arrester by measuring during direct-current reference current, and the direct-current reference current of lightning arrester gets 8mA usually, 0.75U
1mArefer to 0.75 times of 8mA DC reference voltage.The position of what the leakage current under the DC reference voltage of 8mA and 0.75 times of this voltage reflected in fact is lightning arrester U-I knee of characteristic, be two important parameters determining lightning arrester characteristic, directly can reflect whether lightning arrester is in aging and makes moist by these two parameters.
As shown in Figure 1, in embodiments of the invention, in order to test DC reference voltage and the leakage current of the lightning arrester of 1000kV, 1000kV lightning arrester is made up of 5 joint units in series usually, this primary connection device, comprises industrial computer, communication module, high voltage direct current generator, positive and negative adjustable DC power supply, reometer A1, reometer A2 and relay card extender.Wherein, industrial computer is connected with high voltage direct current generator, positive and negative adjustable DC power supply respectively by communication module, row data communication of going forward side by side; Be connected with the relay K a on relay card extender after high voltage direct current generator is in series by cable with reometer A1; Be connected with the relay K b on relay card extender after positive and negative adjustable DC power supply is in series by cable with reometer A2, relay card extender also comprises relay K c in order to ground connection; Relay card extender is provided with 6 output interfaces and is connected with tested lightning arrester by p-wire, and can according to the testing requirement of user, by relay K a, relay K b and relay K c connect from different output interfaces thus are communicated with corresponding p-wire.
Communication module carries out data communication by photoelectric isolation module and industrial computer, reometer A1, reometer A2, high voltage direct current generator and positive and negative adjustable DC power supply as shown in Figure 2.Wherein photoelectric isolation module can convert the electrical signal to optical signal transmission, and then converts light signal to electric signal, can effectively resist various electromagnetic interference (EMI), improves transmission speed and equipment dependability simultaneously, ensures the accuracy of Signal transmissions; Communication module can carry out the process such as filtering, AD/DA conversion to electric signal.
Based on the method for testing of the primary connection device of above-mentioned test 1000kV lightning arrester reference voltage and leakage current, its step is as follows:
Step 1: first the often joint of tested lightning arrester is connected with corresponding p-wire, and p-wire is connected to the output port of relay card extender;
Step 2: test point following several situation:
2a) the situation of test cell 1 and unit 2,
If the DC reference voltage of test lightning arrester unit 1 and unit 2 and leakage current, relay K a is placed in the output port 1 of relay card extender, relay K b is placed in the output port 2 of relay card extender, relay K c is placed in the output port 6 of relay card extender, high voltage direct current generator and positive and negative adjustable DC power supply is regulated by industrial computer, the current value of reometer A1 is made to be 16mA, the current value of reometer A2 is 8mA simultaneously, the voltage of usual high voltage direct current generator is much larger than the voltage of positive and negative adjustable DC power supply, the leakage current in unit 3 can be ignored, the now voltage of high voltage direct current generator, be the DC reference voltage of lightning arrester unit 1 when reference current is 8mA, the voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit 2 when reference current is 8mA, regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit 2 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit 2
8mAunder leakage current, keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit 1 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit 1
8mAunder leakage current.Wherein, the data of reometer A1 and reometer A2 read by communication module and photoelectric isolation module;
2b) the situation of measuring unit 2 and unit 3, unit 3 and unit 4,
If test lightning arrester unit i(i=2, 3) and the DC reference voltage of unit i+1 and leakage current, relay K a is placed in the output port i of relay card extender, relay K b is placed in the output port i+1 of relay card extender, relay K c is placed in the output port i-1 of relay card extender, high voltage direct current generator and positive and negative adjustable DC power supply is regulated by industrial computer, the current value of reometer A1 is made to be 16mA, the current value of reometer A2 is 8mA simultaneously, the voltage of usual high voltage direct current generator is much larger than the voltage of positive and negative adjustable DC power supply, the leakage current in unit i+2 can be ignored, the now voltage of high voltage direct current generator, be lightning arrester unit i(i=2, 3) DC reference voltage when reference current is 8mA, the voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit i+1 when reference current is 8mA, regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit i+1 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit i+1
8mAunder leakage current, keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit i by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit i
8mAunder leakage current.Wherein, the data of reometer A1 and reometer A2 read by communication module and photoelectric isolation module;
2c) the situation of measuring unit 4 and unit 5,
If the DC reference voltage of test lightning arrester unit 4 and unit 5 and leakage current, relay K a is placed in the output port 4 of relay card extender, relay K b is placed in the output port 3 of relay card extender, relay K c is placed in the output port 5 of relay card extender, high voltage direct current generator and positive and negative adjustable DC power supply is regulated by industrial computer, the current value of reometer A1 is made to be 16mA, the current value of reometer A2 is 8mA simultaneously, the voltage of usual high voltage direct current generator is much larger than the voltage of positive and negative adjustable DC power supply, the leakage current in unit 3 can be ignored, the now voltage of high voltage direct current generator, be the DC reference voltage of lightning arrester unit 5 when reference current is 8mA, the voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit 4 when reference current is 8mA, regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit 5 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit 5
8mAunder leakage current, keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit 4 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit 4
8mAunder leakage current.Wherein, the data of reometer A1 and reometer A2 read by communication module and photoelectric isolation module.
In sum, D.C. reference voltage of arrester of the present invention, the primary connection device leaking DC current test and method of testing, easy-to-connect, primary connection can complete all pilot projects, avoid repeatedly changing instrument, change wiring, shorten the time needing to have a power failure, time saving and energy saving, have a good application prospect.
More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. test the primary connection device of 1000kV lightning arrester reference voltage and leakage current, it is characterized in that: comprise industrial computer, communication module, high voltage direct current generator, positive and negative adjustable DC power supply, reometer A1, reometer A2 and relay card extender, described industrial computer is connected with positive and negative adjustable DC power supply with high voltage direct current generator respectively by communication module, carries out data communication; Be connected with the relay K a on relay card extender after described high voltage direct current generator is in series by cable with reometer A1; Be connected with the relay K b on relay card extender after described positive and negative adjustable DC power supply is in series by cable with reometer A2; Described relay card extender also comprises relay K c in order to ground connection; Described relay card extender is provided with 6 output interfaces and is connected with tested lightning arrester by p-wire;
Described communication module carries out data communication by photoelectric isolation module and industrial computer, reometer A1, reometer A2, high voltage direct current generator, positive and negative adjustable DC power supply; Described photoelectric isolation module is used in data communication process, converting the electrical signal to light signal and converting light signal to electric signal, and resists electromagnetic interference (EMI); Described communication module is used for carrying out filtering and AD/DA conversion to electric signal;
Described relay card extender is according to testing requirement by relay K a, and relay K b and relay K c connect from different output interfaces thus be communicated with corresponding p-wire.
2. utilize the primary connection device of the test 1000kV lightning arrester reference voltage described in claim 1 and leakage current to carry out the method for testing, it is characterized in that, comprise the following steps:
1): 1000kV lightning arrester is made up of 5 joint units in series usually, first the often joint of tested lightning arrester is connected with corresponding p-wire, and p-wire is connected to the output port of relay card extender;
2): test point following three kinds of situations:
2a) the situation of test cell 1 and unit 2,
If the DC reference voltage of test lightning arrester unit 1 and unit 2 and leakage current, relay K a is placed in the output port 1 of relay card extender, relay K b is placed in the output port 2 of relay card extender, relay K c is placed in the output port 6 of relay card extender, regulate the output valve of high voltage direct current generator and positive and negative adjustable DC power supply, measure DC reference voltage and the leakage current of lightning arrester unit 1 and unit 2;
2b) the situation of measuring unit 2 and unit 3, unit 3 and unit 4,
If test lightning arrester unit i(i=2,3) and the DC reference voltage of unit i+1 and leakage current, relay K a is placed in the output port i of relay card extender, relay K b is placed in the output port i+1 of relay card extender, relay K c is placed in the output port i-1 of relay card extender, regulate the output valve of high voltage direct current generator and positive and negative adjustable DC power supply, measure DC reference voltage and the leakage current of lightning arrester unit i and unit i+1;
2c) the situation of measuring unit 4 and unit 5,
If the DC reference voltage of test lightning arrester unit 4 and unit 5 and leakage current, relay K a is placed in the output port 4 of relay card extender, relay K b is placed in the output port 3 of relay card extender, relay K c is placed in the output port 5 of relay card extender, regulate the output valve of high voltage direct current generator and positive and negative adjustable DC power supply, measure DC reference voltage and the leakage current of lightning arrester unit 4 and unit 5.
3. method of testing according to claim 2, is characterized in that, described situation 2a) and situation 2b), after wiring completes, measure lightning arrester unit i(i=1,2,3) and the DC reference voltage of unit i+1 and the method for leakage current comprise the following steps:
5-1) regulate high voltage direct current generator and positive and negative adjustable DC power supply by industrial computer, the current value of reometer A1 is made to be 16mA, simultaneously the current value of reometer A2 is 8mA, and now the voltage of high voltage direct current generator is lightning arrester unit i(i=1,2,3) DC reference voltage when reference current is 8mA; The voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit i+1 when reference current is 8mA;
5-2) regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit i+1 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit i+1
8mAunder leakage current; Keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit i by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit i
8mAunder leakage current;
The data of described reometer A1 and reometer A2 read by communication module and photoelectric isolation module.
4. method of testing according to claim 2, is characterized in that, described situation 2c) after wiring completes, measure lightning arrester unit 4 and the DC reference voltage of unit 5 and the method for leakage current and comprise the following steps:
6-1) regulate high voltage direct current generator and positive and negative adjustable DC power supply by industrial computer, the current value of reometer A1 is made to be 16mA, the current value of reometer A2 is 8mA simultaneously, and now the voltage of high voltage direct current generator is the DC reference voltage of lightning arrester unit 5 when reference current is 8mA; The voltage that the voltage of high voltage direct current generator deducts positive and negative adjustable DC power supply is the DC reference voltage of lightning arrester unit 4 when reference current is 8mA;
6-2) regulating the output valve of positive and negative adjustable DC power supply to be zero by industrial computer, is then the 0.75U of unit 4 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the reading of reometer A2 is the 0.75U of unit 4
8mAunder leakage current; Keeping the output valve of positive and negative adjustable DC power supply to be zero, is the 0.75U of unit 5 by the output voltage of industrial computer adjustment high voltage direct current generator
8mA, now the current value of reometer A1 deducts the current value of reometer A2, is the 0.75U of unit 5
8mAunder leakage current;
The data of described reometer A1 and reometer A2 read by communication module and photoelectric isolation module.
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| CN111521847A (en) * | 2020-05-20 | 2020-08-11 | 国家电网有限公司 | Lightning arrester direct current test wiring converter |
| CN116106619B (en) * | 2023-04-10 | 2023-06-16 | 国网江苏省电力有限公司电力科学研究院 | Detection device and detection method for energy dissipation equipment of power transmission system |
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| CN103124063A (en) * | 2012-07-13 | 2013-05-29 | 中电普瑞科技有限公司 | Arrester overvoltage protection device with variable voltage ratio and implementation method |
| CN202956399U (en) * | 2012-11-02 | 2013-05-29 | 重庆市电力公司璧山供电局 | Test stand for 10kV lightning arresters |
| CN103033652A (en) * | 2012-12-27 | 2013-04-10 | 江苏省电力公司电力科学研究院 | Tester wiring concentration conversion device for vehicle |
| CN103197169A (en) * | 2013-02-25 | 2013-07-10 | 河海大学常州校区 | Lightning arrester comprehensive performance detection circuit |
| CN103293409A (en) * | 2013-04-22 | 2013-09-11 | 国家电网公司 | Lightning conductor direct current test method and test platform based on voltage compensation |
| CN203551643U (en) * | 2013-11-13 | 2014-04-16 | 国家电网公司 | One-time wiring apparatus for testing reference voltage and leakage current of 1000-kV lightning arrester |
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