Cause Analysis of an Explosion Accident of LW15A-550 Circuit Breaker

QIN Yining; ZENG Yanjun; CAO Hong; LIU Jinxiao; WANG Dianchu; FAN Youping

doi:10.13296/j.1001-1609.hva.2016.07.028

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Cause Analysis of an Explosion Accident of LW15A-550 Circuit Breaker

更新时间：2025-04-26

- Cause Analysis of an Explosion Accident of LW15A-550 Circuit Breaker
- High VoltageApparatus Vol. 52, Issue 7, Pages: 179-184+191(2016)
- 作者机构：
  
  1. 中国南方电网有限责任公司超高压输电公司曲靖局
  2. 武汉大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.07.028
  CLC： TM561
- Published：2016
- 稿件说明：
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[1]秦怡宁,曾彦珺,曹鸿,刘晋孝,王电处,樊友平.LW15A-550型断路器爆炸事故原因分析[J].高压电器,2016,52(07):179-184+191.

QIN Yining, ZENG Yanjun, CAO Hong, et al. Cause Analysis of an Explosion Accident of LW15A-550 Circuit Breaker[J]. High voltageapparatus, 2016, 52(7): 179-184+191.
[1]秦怡宁,曾彦珺,曹鸿,刘晋孝,王电处,樊友平.LW15A-550型断路器爆炸事故原因分析[J].高压电器,2016,52(07):179-184+191. DOI： 10.13296/j.1001-1609.hva.2016.07.028.

QIN Yining, ZENG Yanjun, CAO Hong, et al. Cause Analysis of an Explosion Accident of LW15A-550 Circuit Breaker[J]. High voltageapparatus, 2016, 52(7): 179-184+191. DOI： 10.13296/j.1001-1609.hva.2016.07.028.

摘要

在高压输电系统中

滤波器无论在抑制谐波还是无功补偿方面起着非常重要的作用

因此分析总结滤波器故障原因

对滤波器的安全稳定运行具有十分重要的意义。文中首先对常见的交流滤波器中断路器故障类型和故障特点进行了总结。然后对一次±500 kV直流换流站发生的高压断路器爆炸事故

根据故障录波、现场试验及仿真、解体检查等情况

进行了深入的原因分析。分析结果表明造成此次事故的原因是:电容器本身存在绝缘缺陷

且均压电容器与灭弧室静触头间存在较大的电位差

导致静触头场强较高存在对电容器放电趋势

最终致使电容器和灭弧室瓷套先后发生径向击穿

致使瓷套爆裂。最后

提出有效整改措施

防止类似事件再次发生。

Abstract

In high voltage transmission system

filter plays a very important role on no matter suppress the harmonic

but reactive power compensation. Therefore

analyzing the causes of filter failure is of great importance for the safe and stable operation of filter in the future. First

the common fault type and its characteristics of AC filter circuit breakers are summarized. Then

based on an explosion accident of high-voltage circuit breaker in a DC converter station

the causes of the accident are analyzed

according to the fault record

field test and simulation

the disassembling inspection and so on. The result of the analysis shows that: the capacitor has insulation defects

a large potential difference exists between the grading capacitor and the static contact of arc chamber

which lead to the discharge trend to the capacitor because of the high field strength of static contact

eventually led to the occurrence of radial breakdown of the capacitor and the interrupting porcelain insulator

and then the explosion. Finally

some effective corrective measures are mentioned

which would prevent similar incidents from happening again.

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