Analysis of Switching Three-phase Short Circuit Current of Capacitor Bank by 35 kV Circuit Breaker

LI Kaiyu; LI Jinbin

doi:10.14044/j.1674-1757.pcrpc.2014.01.018

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Analysis of Switching Three-phase Short Circuit Current of Capacitor Bank by 35 kV Circuit Breaker

更新时间：2024-09-14

- Analysis of Switching Three-phase Short Circuit Current of Capacitor Bank by 35 kV Circuit Breaker
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 35, Issue 1, Pages: 83-89(2014)
- 作者机构：
  
  湖北省电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2014.01.018
  CLC： TM561
- Published：2014，
- 稿件说明：
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[1]李凯宇,李劲彬.35kV断路器切电容器组引起三相短路故障的分析[J].电力电容器与无功补偿,2014,35(01):83-89.

LI KAIYU, LI JINBIN. Analysis of Switching Three-phase Short Circuit Current of Capacitor Bank by 35 kV Circuit Breaker. [J]. Power capacitor & reactive power compensation, 2014, 35(1): 83-89.
[1]李凯宇,李劲彬.35kV断路器切电容器组引起三相短路故障的分析[J].电力电容器与无功补偿,2014,35(01):83-89. DOI： 10.14044/j.1674-1757.pcrpc.2014.01.018.

LI KAIYU, LI JINBIN. Analysis of Switching Three-phase Short Circuit Current of Capacitor Bank by 35 kV Circuit Breaker. [J]. Power capacitor & reactive power compensation, 2014, 35(1): 83-89. DOI： 10.14044/j.1674-1757.pcrpc.2014.01.018.

摘要

本文对220 kV C变电站2#主变压器35 kV侧42#断路器由AVC系统自动控制切电容器组时

42#开关柜内发生三相短路

由于变压器线圈抗短路能力不足而引起2#主变压器本体重瓦斯保护动作

导致变压器损坏的严重事故

结合故障录波记录和消弧线圈动作记录

通过对故障断路器进行详细的解体观察及试验

对事故过程采用EMTP进行过电压模拟仿真及分析等方法

从事故现象及理论上较为准确地判断出了故障原因

并提出了相应的防范措施。

Abstract

When capacitor bank is switched by circuit breaker with AVC system automatic control at 35 kV side of main transformer in 220 kV substation

the transformer may be damaged due to re-gas protection action by three-phase short circuit in the switchgear panel. This paper analyzes such serious fault with combination of the recorded faulty oscillogram and the action record of arc suppression coil. By way of disassembly and test of the faulty circuit breaker

overvoltage simulation and analysis of the fault process etc

the reason of the fault is found out from the accident and in theory

corresponding prevention measures are raised.

关键词

三相短路断路器切电容器组绝缘

Keywords

three-phase short circuitcapacitor bank switching by circuit breakerinsulation

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GUO Tian-xing2

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Related Institution

Xi’an Jiaotong University

西安交通大学西安710049

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Xi’an High Voltage Apparatus Research Institute Co.,Ltd.

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