Analysis and Treatment of Discharge Defect of 220 kV GIS Disconnector

LI Wei; KE Chong; WANG Min; LIU Xingwei; DONG Quan; ZHOU Wendong

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Analysis and Treatment of Discharge Defect of 220 kV GIS Disconnector

更新时间：2025-06-18

- Analysis and Treatment of Discharge Defect of 220 kV GIS Disconnector
- High Voltage Apparatus Pages: 1-7(2025)
- 作者机构：
  
  国网河南省电力公司超高压公司，郑州　 450000
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LI Wei, KE Chong, WANG Min, et al. Analysis and Treatment of Discharge Defect of 220 kV GIS Disconnector[J/OL]. High voltage apparatus, 2025, 1-7.
DOI：

LI Wei, KE Chong, WANG Min, et al. Analysis and Treatment of Discharge Defect of 220 kV GIS Disconnector[J/OL]. High voltage apparatus, 2025, 1-7. DOI：

摘要

文中基于一起220 kV GIS隔离开关气室异响，阐述了隔离开关动作原理、拨叉结构，设备解体后发现传动机构拨叉与轴销处有明显的电弧烧伤痕迹，其间等电位接触弹簧消失不见。结合Comsol有限元仿真分析，推断接触弹簧变形、损坏，导致拨叉与轴销无法可靠等电位连接，产生悬浮电位，造成气室内电场畸变，进而击穿放电发出异常声响。据此，开展同型号隔离开关隐患排查，更换拨叉接触弹簧，加强运行巡视等运检措施，为类似缺陷的检测和处理提供了经验参考。

Abstract

Based on the abnormal sound in the air chamber of 220 kV GIS disconnector

this paper expounds the operating principle of the disconnector and the structure of the shifting fork. After the disassembly of the equipment

it is found that there are obvious arc burn marks at the shifting fork and shaft pin of the transmission mechanism

and the equipotential contact spring between them disappeared. Combined with Comsol finite element simulation analysis

it is inferred that the contact spring is deformed and damaged

resulting in the unreliable equipotential connection between the shifting fork and the shaft pin

then generated suspension potential

which causes electric field distortion in the gas chamber

and then the breakdown discharge makes abnormal sound. According to this

carry out the hidden dangers of disconnectors of the same model

replace the contact spring of the fork

and strengthen the inspection measures such as operation inspection

which provides experience and reference for the detection and treatment of similar defects.

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references

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