Analysis of an internal discharge fault in a GIS circuit breaker at a converter station

ZHAO Xiyang; LIU Shuji; NIU Bo; LI Hao; LUO Haigui; WANG Xuguang

doi:10.3969/j.issn.1672-3643.2026.01.010

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Analysis of an internal discharge fault in a GIS circuit breaker at a converter station

更新时间：2026-03-04

- Analysis of an internal discharge fault in a GIS circuit breaker at a converter station
- Ningxia Electric Power Issue 1, (2026)
- 作者机构：
  
  1. 国网宁夏电力有限公司超高压公司,宁夏,银川,750011
  2. 国网宁夏电力有限公司电力科学研究院,宁夏,银川,750011
  3. 西安西电开关电气有限公司,陕西,西安,710077
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1672-3643.2026.01.010
  CLC：
- Online First：03 March 2026，
  
  Published：03 March 2026
- 稿件说明：
移动端阅览
ZHAO Xiyang, LIU Shuji, NIU Bo, et al. Analysis of an internal discharge fault in a GIS circuit breaker at a converter station[J]. Ningxia Electric Power, 2026, (1).
DOI：

ZHAO Xiyang, LIU Shuji, NIU Bo, et al. Analysis of an internal discharge fault in a GIS circuit breaker at a converter station[J]. Ningxia Electric Power, 2026, (1). DOI： 10.3969/j.issn.1672-3643.2026.01.010.

摘要

针对某换流站发生的一起800 kV 气体绝缘金属封闭开关（gas insulated switchgear，GIS）断路器内部放电故障，本文通过解体检查、电场仿真、绝缘拉杆模拟试验等检查，对放电路径及发生原因进行分析，确认放电原因为内部异物放电，并给出了相应解决措施，以避免类似放电事故的发生。

Abstract

An internal discharge fault occurred in an 800 kV gas-insulated switchgear(GIS)circuit breaker at a converter station.To identify the discharge path and root cause

comprehensive investigations were carried out

including disassembly inspection

electric field simulation

and insulation operating rod simulation tests.The results indicate that the fault was caused by partial discharge induced by a foreign object inside the enclosure

which led to local electric field distortion.Corresponding mitigation measures are proposed to prevent the recurrence of similar discharge failures

providing a reference for the safe operation and maintenance of GIS equipment.

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