Analysis on a Fault of Grading Capacitor for 500 kV Circuit Breaker

WU Deguan; ZHOU Yu; LI Weiguo; LI Hongyuan; XU Yi; XIA Hui

doi:10.13296/j.1001-1609.hva.2016.03.032

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Analysis on a Fault of Grading Capacitor for 500 kV Circuit Breaker

更新时间：2025-04-26

- Analysis on a Fault of Grading Capacitor for 500 kV Circuit Breaker
- High VoltageApparatus Vol. 52, Issue 3, Pages: 195-199(2016)
- 作者机构：
  
  中国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：10.13296/j.1001-1609.hva.2016.03.032
  CLC： TM53;TM561
- Published：2016
- 稿件说明：
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[1]吴德贯,周禹,黎卫国,李红元,许毅,夏辉.一起500kV断路器均压电容器故障分析[J].高压电器,2016,52(03):195-199.

WU Deguan, ZHOU Yu, LI Weiguo, et al. Analysis on a Fault of Grading Capacitor for 500 kV Circuit Breaker[J]. High voltageapparatus, 2016, 52(3): 195-199.
[1]吴德贯,周禹,黎卫国,李红元,许毅,夏辉.一起500kV断路器均压电容器故障分析[J].高压电器,2016,52(03):195-199. DOI： 10.13296/j.1001-1609.hva.2016.03.032.

WU Deguan, ZHOU Yu, LI Weiguo, et al. Analysis on a Fault of Grading Capacitor for 500 kV Circuit Breaker[J]. High voltageapparatus, 2016, 52(3): 195-199. DOI： 10.13296/j.1001-1609.hva.2016.03.032.

摘要

对某换流站一起500 kV断路器均压电容器在断路器分闸时发生放电击穿的故障进行分析

依据现场检查情况、故障录波情况、返厂解体检查情况及相关试验数据

对均压电容器击穿原因展开判断分析

并对绝缘筒击穿及碳化的原因进行了探讨。经分析

该次故障发生的原因为在断路器分闸的过程中的操作过电压及较大的放电电流引起了均压电容器的击穿;此外

对直流站控系统存在的逻辑问题提出了处理意见。针对该故障

提出改进措施

以提高设备的运维可靠性。

Abstract

A discharge breakdown fault of grading capacitor of 500 k V circuit breaker in a converter station

which occurred in breaker opening process

is analyzed. According to the field inspection record

the fault waveform record

the recall-checking record and the test data

the cause of the breakdown of grading capacitor

as well as the cause of the breakdown and carbonization of the insulating cylinder

is investigated. The results show that the operating overvoltage and discharge current in the process of breaker opening resulted in the breakdown fault. Some countermeasures against the logical problem in DC station control system are put forward

and some improvement approaches are suggested in order to improve the reliability of operation and maintenance of the electrical equipment.

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Related Institution

PowerChina Beijing Engineering Corporation Limited

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