CN110018433B - Performance test method of high-voltage switch characteristic test system - Google Patents
Performance test method of high-voltage switch characteristic test system Download PDFInfo
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- CN110018433B CN110018433B CN201910422965.2A CN201910422965A CN110018433B CN 110018433 B CN110018433 B CN 110018433B CN 201910422965 A CN201910422965 A CN 201910422965A CN 110018433 B CN110018433 B CN 110018433B
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Abstract
The invention discloses a performance test method of a high-voltage switch characteristic test system, wherein the high-voltage switch characteristic test system is mainly used for measuring the different periods of a switch and the amplitude of a radio frequency pulse signal, and the main characteristic parameters of the performance are the accuracy of a pulse interval test and the consistency of the amplitude test. In order to test the performance of a high-voltage switch characteristic test system of the system, test the accuracy of pulse interval test and the consistency of amplitude test, and use a nanosecond steep pulse generator to match with a monopole probe antenna to test the performance of a prototype of the detection system. The testing method is simple in preparation, and can be used for reflecting the performance of the testing system, so that the effectiveness of the detection of the working state of the high-voltage switch is ensured, and the safe and reliable operation of a power grid is ensured.
Description
Technical Field
The invention relates to the field of on-line detection of electrical equipment, in particular to a performance test method of a high-voltage switch characteristic test system.
Background
In recent years, power systems have been increasingly demanding in terms of reliability and economy of power supply. The safe operation of the high-voltage power transmission and transformation equipment becomes an important factor influencing the safe, stable and economic operation of the power system. The high-voltage switch has a large number in the power grid, plays a role in control and protection, and can directly cause power grid accidents or further enlarge the accidents when the high-voltage switch fails, thereby causing considerable economic and social losses. How to effectively detect the working state of the high-voltage switch, timely find the early defects of the switch, treat the defective parts in advance, prevent the occurrence of serious accidents such as switch explosion and the like, and have very important significance for ensuring the safe and reliable operation of a power grid.
At present, the construction of national smart power grids has been expanded comprehensively, the equipment intellectualization process is accelerated, the research of a high-voltage switch characteristic detection system is also many, the high-voltage switch characteristic detection system is mainly used for measuring the different periods of the switch and the amplitude of a radio frequency pulse signal, the performance of the high-voltage switch characteristic detection system is important, and the main characteristic parameters of the performance are the accuracy of a pulse interval test and the consistency of the amplitude test.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems, the invention provides a performance test method of a high-voltage switch characteristic test system, which is used for testing the accuracy of a pulse interval test and the consistency of an amplitude test of the high-voltage switch characteristic test system.
The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: a performance test method for a high-voltage switch characteristic test system comprises the steps of detecting the accuracy of a pulse interval test of the system and the consistency of an amplitude test, and performing the performance test on the system by using a nanosecond steep pulse generator and matching with a monopole probe antenna.
Further, the pulse interval accuracy test method is as follows:
1) the unipolar probe antenna is connected with the nanosecond steep pulse generator;
2) adjusting a nanosecond steep pulse generator to emit steep pulses with the amplitude of 100V and the frequency of 200 Hz;
3) receiving signals outside 0.5m by using a circuit breaker different-period live detection system;
4) reading 5 times of continuous pulse interval time, calculating the average value of the pulse interval time, and recording the average value as the actually measured pulse interval time;
5) the pulse interval accuracy deviation is calculated according to:
further, the amplitude consistency test method is as follows:
1) the unipolar probe antenna is connected with the nanosecond steep pulse generator;
2) adjusting a nanosecond steep pulse generator to emit steep pulses with the amplitude of 100V and the frequency of 200 Hz;
3) receiving signals outside 0.5m by using a circuit breaker different-period live detection system;
4) reading the amplitude of 5 continuous pulses, and calculating the maximum value, the minimum value and the average value of the amplitude of the 5 pulses;
5) the amplitude consistency deviation is calculated according to:
has the advantages that: the testing method is simple in preparation, and can be used for reflecting the performance of the testing system, so that the effectiveness of the detection of the working state of the high-voltage switch is ensured, and the safe and reliable operation of a power grid is ensured.
Drawings
FIG. 1 is a pulse interval accuracy deviation waveform;
fig. 2 is a waveform diagram of amplitude uniformity deviation.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
The high-voltage switch characteristic detection system is mainly used for measuring the different-phase time of a switch and the amplitude of a radio frequency pulse signal, and the main characteristic parameters of the performance of the high-voltage switch characteristic detection system are the accuracy of a pulse interval test and the consistency of an amplitude test.
In order to test the accuracy of the pulse interval test of the system and the consistency of the amplitude test, the invention uses a nanosecond steep pulse generator to match with a monopole probe antenna to perform performance test on a developed detection system model machine. The nanosecond steep pulse generator has the functions of pulse emission frequency and pulse amplitude adjustment, the frequency covers 100Hz-200Hz, and the pulse amplitude is 100V.
And (3) testing the pulse interval accuracy, wherein the testing method comprises the following steps:
1) the unipolar probe antenna is connected with the nanosecond steep pulse generator;
2) the nanosecond steep pulse generator is adjusted to emit steep pulses with amplitude of 100V and frequency of 200 Hz.
3) Receiving signals outside 0.5m by using a circuit breaker different-period live detection system;
4) reading 5 times of continuous pulse interval time, calculating the average value as shown in table 1, and recording as the actually measured pulse interval time;
TABLE 1
5) The pulse interval accuracy deviation was calculated according to the following equation, and the test data waveform is shown in fig. 1.
The measured pulse interval time average is calculated from the data in table 1:
standard pulse interval time:
T＝5ms
deviation in accuracy:
σ(T)＝0.53％
it can be seen that the pulse interval time measurement uncertainty of the detection system is less than 1%.
And (3) testing the amplitude consistency, wherein the testing method comprises the following steps:
1) the unipolar probe antenna is connected with the nanosecond steep pulse generator;
2) adjusting a nanosecond steep pulse generator to emit steep pulses with the amplitude of 100V and the frequency of 200 Hz;
3) receiving signals outside 0.5m by using a circuit breaker different-period live detection system;
4) reading the amplitude of the continuous 5-time pulse, recording the amplitude as an actually measured pulse amplitude in a table 2, and calculating the maximum value, the minimum value and the average value of the 5-time pulse amplitudes;
TABLE 2
5) The amplitude uniformity deviation is calculated according to the following equation, and the data waveform is shown in fig. 2.
And calculating the measured average amplitude, the maximum value and the minimum value according to the data in the table 2:
Ymax＝2.04298V
Ymin＝2.00212V
deviation of consistency:
σ(Y)＝2.02％
it can be seen that the pulse amplitude measurement uniformity deviation of the detection system is less than 5%.
The testing method is simple in preparation, and can be used for reflecting the performance of the testing system, so that the effectiveness of the detection of the working state of the high-voltage switch is ensured, and the safe and reliable operation of a power grid is ensured.
Claims (1)
1. A performance test method of a high-voltage switch characteristic test system is characterized by comprising the steps of detecting the accuracy of a pulse interval test of the system and the consistency of an amplitude test, and performing the performance test on the system by using a nanosecond steep pulse generator and matching with a monopole probe antenna;
the pulse interval accuracy test method comprises the following steps:
1) the unipolar probe antenna is connected with the nanosecond steep pulse generator;
2) adjusting a nanosecond steep pulse generator to emit steep pulses with the amplitude of 100V and the frequency of 200 Hz;
3) receiving signals outside 0.5m by using a circuit breaker different-period live detection system;
4) reading 5 times of continuous pulse interval time, calculating the average value of the pulse interval time, and recording the average value as the actually measured pulse interval time;
5) the pulse interval accuracy deviation is calculated according to:
the amplitude consistency test method comprises the following steps:
1) the unipolar probe antenna is connected with the nanosecond steep pulse generator;
2) adjusting a nanosecond steep pulse generator to emit steep pulses with the amplitude of 100V and the frequency of 200 Hz;
3) receiving signals outside 0.5m by using a circuit breaker different-period live detection system;
4) reading the amplitude of 5 continuous pulses, and calculating the maximum value, the minimum value and the average value of the amplitude of the 5 pulses;
5) the amplitude consistency deviation is calculated according to:
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| JPH08316809A (en) * | 1995-05-22 | 1996-11-29 | Hiroshi Iwai | High voltage semiconductor switch |
| FR2879374B1 (en) * | 2004-12-15 | 2007-03-02 | Commissariat Energie Atomique | DOUBLE FREQUENCY DEVICE |
| US8461848B2 (en) * | 2008-12-10 | 2013-06-11 | Marvell International Ltd. | Cable diagnostics for Base-T systems |
| CN101620253A (en) * | 2009-07-24 | 2010-01-06 | 重庆大学 | Ultra-high frequency positioning and detection device of local discharge of electrical equipment and method thereof |
| CN103809089B (en) * | 2014-01-25 | 2017-07-28 | 广东电网公司东莞供电局 | For the production method for the calibration pulse for detecting high-tension apparatus shelf depreciation |
| CN203720221U (en) * | 2014-01-26 | 2014-07-16 | 广东电网公司东莞供电局 | Calibration pulse generation device for detecting partial discharge of high voltage device |
| US9551762B1 (en) * | 2015-07-29 | 2017-01-24 | Allegro Microsystems, Llc | Circuits and methods for removing a gain offset in a magnetic field sensor |
| CN205249056U (en) * | 2015-12-18 | 2016-05-18 | 国网冀北电力有限公司张家口供电公司 | High pressure weak current steps down and increases a class device |
| CN106324302B (en) * | 2016-10-28 | 2023-03-31 | 西安石油大学 | Analog load circuit and neutron instrument analog generator load based on same |
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| CN207995050U (en) * | 2017-11-27 | 2018-10-19 | 上海欧秒电力监测设备有限公司 | Steep-sided pulse signal generator |
| CN109444781A (en) * | 2018-09-11 | 2019-03-08 | 国网浙江省电力有限公司电力科学研究院 | A kind of GIS partial discharge superfrequency sensitivity check method based on signal propagation characteristics |
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