Improvement on Dielectric Loss Site Measurement of Grading Capacitors

PENG Xiang; CHEN He; XIA Gu-lin; CHEN Wei; HUANG Fang

doi:10.14044/j.1674-1757.pcrpc.2011.03.013

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Improvement on Dielectric Loss Site Measurement of Grading Capacitors

更新时间：2024-09-14

- Improvement on Dielectric Loss Site Measurement of Grading Capacitors
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 32, Issue 3, Pages: 50-53(2011)
- 作者机构：
  
  南方电网超高压输电公司检修试验中心
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2011.03.013
  CLC： TM561
- Published：2011，
- 稿件说明：
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[1]彭翔,陈禾,夏谷林,陈伟,黄昉.均压电容器介损现场试验的改进措施[J].电力电容器与无功补偿,2011,32(03):50-53.

PENG XIANG, CHEN HE, XIA GU-LIN, et al. Improvement on Dielectric Loss Site Measurement of Grading Capacitors. [J]. Power capacitor & reactive power compensation, 2011, 32(3): 50-53.
[1]彭翔,陈禾,夏谷林,陈伟,黄昉.均压电容器介损现场试验的改进措施[J].电力电容器与无功补偿,2011,32(03):50-53. DOI： 10.14044/j.1674-1757.pcrpc.2011.03.013.

PENG XIANG, CHEN HE, XIA GU-LIN, et al. Improvement on Dielectric Loss Site Measurement of Grading Capacitors. [J]. Power capacitor & reactive power compensation, 2011, 32(3): 50-53. DOI： 10.14044/j.1674-1757.pcrpc.2011.03.013.

摘要

均压电容器电容及介损测量是保证断路器安全稳定运行的一项重要工作。现场测量存在感应电严重干扰的问题

而且目前出现越来越多均压电容器按照预试规程10 kV测试电压下介损值超标

而返厂测试又合格的情况。对现场测量方法进行了研究

提出采用改变试验电源频率和提高试验电源电压的方法来进行均压电容器电容及介损测量。首先对改变试验电源频率来实现对现场电磁干扰的屏蔽、均压电容器介损随电压的变化关系进行了理论分析

然后在某500 kV变电站对均压电容器进行了现场电容及介损测试

结果表明改进后的测试方法收到了很好的效果

这个研究成果对均压电容器预试具有指导性意义。

Abstract

Capacitance and dielectric loss measurement of the grading capacitor is a very important task to assure safe operation of circuit breaker.Such problem as critical interference of induction power exists in the site test

and such case as more and more grading capacitors’ dielectric loss appeared over normal value at 10 kV test voltage according to the standard

but become normal when re-measuring back to manufactory.The site test methods are studied and the methods for capacitance and dielectric loss measurement

changing frequency of test power supply and increasing supply voltage

are proposed.Dielectric loss variation of circuit breaker capacitor with test voltage and the shielding effect to electromagnetic interference

when a different frequency power supply was used for test

is firstly analyzed.The results of capacitance and dielectric loss measurements of grading capacitors in a certain 500 kV transformer substation are proved to be good.This research activity has significance to the site capacitance and dielectric loss measurement of grading capacitors.

关键词

均压电容器介质损耗电容测量

Keywords

circuit-breaker capacitordielectric losscapacitancemeasurement

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