Analysis on Burnout of Closing Resistor and Protective Tube in 550 kV Circuit Breaker

LI Shuang; TANG Jianeng; QU Yan; LU Xuchen

doi:10.13296/j.1001-1609.hva.2021.12.032

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Analysis on Burnout of Closing Resistor and Protective Tube in 550 kV Circuit Breaker

更新时间：2025-04-26

- Analysis on Burnout of Closing Resistor and Protective Tube in 550 kV Circuit Breaker
- High VoltageApparatus Vol. 57, Issue 12, Pages: 232-236(2021)
- 作者机构：
  
  1. 国网辽宁省电力有限公司电力科学研究院
  2. 国网辽宁省电力有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.12.032
  CLC： TM561
- Published：2021
- 稿件说明：
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LI Shuang, TANG Jianeng, QU Yan, et al. Analysis on Burnout of Closing Resistor and Protective Tube in 550 kV Circuit Breaker[J]. High voltageapparatus, 2021, 57(12): 232-236.
DOI：

LI Shuang, TANG Jianeng, QU Yan, et al. Analysis on Burnout of Closing Resistor and Protective Tube in 550 kV Circuit Breaker[J]. High voltageapparatus, 2021, 57(12): 232-236. DOI： 10.13296/j.1001-1609.hva.2021.12.032.

摘要

为了研究某550 kV换流站断路器合闸电阻发生多起烧损事故的原因

避免事故再次发生和扩大

文中通过录波分析、返厂解体分析和仿真计算等手段

获取了较多的支撑原因的证据。研究表明:滑动触指部位涂抹了过多的润滑脂

在触头高速运动过程中

掺杂着银屑的润滑脂随着气流被带到绝缘拉杆和保护管

多次累积引起沿面放电

在触头预击穿的暂态电压下发生了击穿

最终使合闸电阻烧损。

Abstract

For studying the causes of multiple burnout of the closing resistor of a 550 kV converter circuit breaker and avoiding the reoccurrence and expansion of the fault

the sufficient evidence supporting the fault is obtained by such measures as recording analysis

disintegration analysis at factory and simulation calculation etc. The study shows that excessive grease is applied to the sliding contact finger. During the high-speed movement of the contact

the grease mixed with silver crumbs is brought to the insulation rod and protective tube with the airflow and the multiple accumulation leads to surface discharge. The breakdown is occurred at the transient voltage of contact pre-breakdown and finally the closing resistor is burnt out.

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Related Institution

Guangdong Power Grid Co, Ltd, Guangzhou Power Supply Bureau

CSG Extra High Voltage Power Transmission Company, Dali Bureau

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State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University

Foshan Supply Bureau of Guangdong Power Grid Co., Ltd.

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