Testing system for shunt characteristics of multi-column arrester

A shunt characteristic and test system technology, applied in the direction of instruments, measuring devices, measuring electricity, etc., can solve the problems of cumbersome operation, fixed voltage, affecting the accuracy of the test, etc., and achieve the effect of accurate test data and simple operation

Active Publication Date: 2013-11-13
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0004] However, the voltage of the existing test system is relatively fixed and cannot be adjusted or the adjustment range is very small, which cannot meet the actual requirements; at the same tim

Method used

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  • Testing system for shunt characteristics of multi-column arrester
  • Testing system for shunt characteristics of multi-column arrester

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[0025] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] participate figure 1 , The present invention is a test system for the shunt characteristics of a multi-pillar arrester, including a charging circuit, a discharging circuit, and a measurement and control and data analysis management system; the charging circuit includes a test power supply and an energy storage unit, and the multi-level energy storage units are sequentially cascaded in the test power supply At the output end, the energy storage unit includes an energy storage capacitor C and a corresponding charging protection resistor R connected to both ends of the energy storage capacitor C. n ; Specific, C 1 , C 2 ……C n 1 to n-level energy storage capacitors, corresponding to the charging protection resistance set at both ends, R 11 , R 12 Is the first level, R 21 , R 22 ...R n1 , R n2 From 2 to n levels....

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Abstract

A testing system for shunt characteristics of a multi-column arrester comprises a charging loop, a discharging loop and a measuring control and data analysis management system, wherein the charging loop comprises a testing power supply and energy storage units; the multilevel energy storage units are sequentially cascaded with an output end of the testing power supply; each energy storage unit comprises an energy storage capacitor C and charging protection resistors Rn connected to two ends of the energy storage capacitor correspondingly and respectively; the discharging loop comprises a discharging switch G, an energy capacitor C, a wave modulating inductor L, a wave modulating resistors R and a wave modulating resistor S; and the measuring control and data analysis management system comprises a plurality of detecting units, multichannel data acquisition (DAQ) units or multichannel oscilloscopes, a computer data processing unit and a programmable controller, and the number of the detecting units corresponds to the number of columns of the multi-column arrester or the number of groups of valve plates of the multi-column arrester. The testing system can output high-class voltage and is large in adjusting range; and by means of the protection of the charging protection resistors Rn as well as discharging isolation of other levels excluding the first level, the energy storage capacitors C have characteristics of low charging voltage and high discharging voltage.

Description

Technical field [0001] The invention relates to a high-voltage large-current pulse current system, in particular to a test system for the shunt characteristics of a multi-pillar arrester. Background technique [0002] With the rapid development of AC and DC transmission projects, metal oxide arresters are the key power equipment for overvoltage protection in the transmission system to limit the lightning overvoltages that appear in the lines and the transient overvoltages caused by various operations and faults. , Plays a vital role in the safe operation of the entire transmission line. [0003] Surge arresters generally adopt a multi-pillar parallel structure. Under lightning and operating overvoltage impacts, if the current distribution between the arresters is not uniform, it will cause aging or breakdown of a certain column, especially when operating with large energy absorption. In the case of voltage energy, the uneven shunt of the arrester will cause excessive energy absorp...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 陈景亮姚学玲胡上茂廖永力李锐海
Owner XI AN JIAOTONG UNIV
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