Single-phase Grounding Fault Analysis of a GIS in a 220 kV Substation and Treatment Measures

WANG Dong; QIU Zhibin; WEI Wei; LU Xiangdong; LU Zuwen

doi:10.13296/j.1001-1609.hva.2020.11.039

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Single-phase Grounding Fault Analysis of a GIS in a 220 kV Substation and Treatment Measures

更新时间：2025-04-26

- Single-phase Grounding Fault Analysis of a GIS in a 220 kV Substation and Treatment Measures
- High VoltageApparatus Vol. 56, Issue 11, Pages: 259-265+274(2020)
- 作者机构：
  
  1. 国网河南省电力公司电力科学研究院
  2. 南昌大学能源与电气工程系
  3. 国网三门峡供电公司
  4. 国网安阳供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.11.039
  CLC： TM63;TM862
- Published：2020
- 稿件说明：
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[1]王栋,邱志斌,魏巍,路向东,卢祖文.220 kV某变电站GIS单相接地故障分析及处理措施[J].高压电器,2020,56(11):259-265+274.

WANG Dong, QIU Zhibin, WEI Wei, et al. Single-phase Grounding Fault Analysis of a GIS in a 220 kV Substation and Treatment Measures[J]. High voltageapparatus, 2020, 56(11): 259-265+274.
[1]王栋,邱志斌,魏巍,路向东,卢祖文.220 kV某变电站GIS单相接地故障分析及处理措施[J].高压电器,2020,56(11):259-265+274. DOI： 10.13296/j.1001-1609.hva.2020.11.039.

WANG Dong, QIU Zhibin, WEI Wei, et al. Single-phase Grounding Fault Analysis of a GIS in a 220 kV Substation and Treatment Measures[J]. High voltageapparatus, 2020, 56(11): 259-265+274. DOI： 10.13296/j.1001-1609.hva.2020.11.039.

摘要

针对220 kV某变电站GIS单相接地故障

对发生故障的隔离开关进行现场解体及返厂检查

对动静触头、盆式绝缘子、壳体内壁和均压罩进行检查

并采用有限元法对隔离开关进行电场仿真计算。综合分析表明

均压罩偏移和机械部件锈蚀引起动静触头在合闸时出现偏差

进而导致隔离开关动静触头接触不良

产生局部放电

并引发中间触头对壳体击穿

是造成此次故障的原因。对故障采取了综合处理措施

通过微水试验和特高频局放带电检测试验验证了故障处理效果

对GIS设备安装和日常维护提出了合理化建议。

Abstract

Aiming at a single-phase grounding fault of a GIS in a 220 kV substation

the failure disconnector is disassembled and inspected both at the site and returned to the factory.The moving and static contacts

basin-type insulator

inner wall of the shell and the grading shield are inspected.The electric field simulation is carried out on the disconnector by finite element method.Comprehensive analysis shows that skewing of the grading shield and corrosion of the mechanical components cause deviation during the closing process of the moving and static contacts

results as poor contact of these two contacts.It generates partial discharge and causes breakdown between the middle contact and the shell.This is the reason of this fault.Comprehensive measures have been taken to deal with this fault

and the micro-water tests and UHF partial discharge detection tests are conducted to verify the treatment efficiency.Some reasonable suggestions are proposed for installation and daily maintenance of the GIS.

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