Analysis of Typical Fault Caused by Insulation Breakdown of 500 kV GIS Disconnector

GE Dong; TIAN Yang; TIAN Hongxun; HUANG He; GAO Xinmiao

doi:10.13296/j.1001-1609.hva.2020.08.040

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Analysis of Typical Fault Caused by Insulation Breakdown of 500 kV GIS Disconnector

更新时间：2025-04-26

- Analysis of Typical Fault Caused by Insulation Breakdown of 500 kV GIS Disconnector
- High VoltageApparatus Vol. 56, Issue 8, Pages: 261-267(2020)
- 作者机构：
  
  1. 国家电网有限公司
  2. 中国电力科学研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.08.040
  CLC： TM595
- Published：2020
- 稿件说明：
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[1]葛栋,田阳,田洪迅,黄河,高鑫淼.500 kV GIS隔离开关绝缘击穿典型故障分析[J].高压电器,2020,56(08):261-267.

GE Dong, TIAN Yang, TIAN Hongxun, et al. Analysis of Typical Fault Caused by Insulation Breakdown of 500 kV GIS Disconnector[J]. High voltageapparatus, 2020, 56(8): 261-267.
[1]葛栋,田阳,田洪迅,黄河,高鑫淼.500 kV GIS隔离开关绝缘击穿典型故障分析[J].高压电器,2020,56(08):261-267. DOI： 10.13296/j.1001-1609.hva.2020.08.040.

GE Dong, TIAN Yang, TIAN Hongxun, et al. Analysis of Typical Fault Caused by Insulation Breakdown of 500 kV GIS Disconnector[J]. High voltageapparatus, 2020, 56(8): 261-267. DOI： 10.13296/j.1001-1609.hva.2020.08.040.

摘要

GIS设备在高电压等级骨干电网应用广泛

其可靠性直接影响大电网安全稳定运行。文中针对某变电站一起500 kV GIS隔离开关绝缘击穿故障进行深入分析。首先通过现场故障特征、理论仿真计算、返厂解体检查多手段对故障气室绝缘击穿进行全面分析。其次综合各种信息

采用理论与实际相结合

厂内溯源与试验验证相结合的分析方法

确认故障原因为隔离开关绝缘拉杆表面纤维起层

产生异物引起电场畸变

同时其绝缘裕度小

导致击穿放电。最后根据故障原因

提出针对此类故障后续应对措施。

Abstract

GIS equipment has been applied in the ultra-high voltage grid widely

its reliability directly affect safe and stable operation for large power grid. In this paper

a case of insulation breakdown fault of 500 kV GIS disconnector was analyzed deeply. Firstly

the insulation breakdown of the fault gas chamber is analyzed comprehensively by fault characteristics

theoretical simulation calculation and back to factory disassembly inspection. Secondly

the analysis method of combining theory with practice

in plant traceability and test verification is adopted to confirm that the fault is caused by the fiber layer on the insulation rod surface of the disconnector

which causes the electric field distortion caused by foreign matters

and the insulation margin is small

leading to breakdown discharge.Finally

according to the cause of the failure

the follow-up measures are proposed.

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