Online Detection and Disassembly Analysis on Floating Discharge Defect in GIS Disconnector

GUO Chao; ZHOU Bo; TAN Xuemin; YANG Hongquan; LIU Yanqin; SONG Ying; LUO Yang; QIU Wei; GAO Jun

doi:10.13296/j.1001-1609.hva.2021.05.024

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Online Detection and Disassembly Analysis on Floating Discharge Defect in GIS Disconnector

更新时间：2025-04-26

- Online Detection and Disassembly Analysis on Floating Discharge Defect in GIS Disconnector
- High VoltageApparatus Vol. 57, Issue 5, Pages: 168-174(2021)
- 作者机构：
  
  1. 国网成都供电公司
  2. 成都信息工程大学控制工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.05.024
  CLC： TM595;TM564.1
- Published：2021
- 稿件说明：
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[1]郭超,周波,谭学敏,杨红权,刘彦琴,宋颖,罗杨,邱炜,高竣.GIS隔离开关内悬浮放电缺陷带电检测与解体分析[J].高压电器,2021,57(05):168-174.

GUO Chao, ZHOU Bo, TAN Xuemin, et al. Online Detection and Disassembly Analysis on Floating Discharge Defect in GIS Disconnector[J]. High voltageapparatus, 2021, 57(5): 168-174.
[1]郭超,周波,谭学敏,杨红权,刘彦琴,宋颖,罗杨,邱炜,高竣.GIS隔离开关内悬浮放电缺陷带电检测与解体分析[J].高压电器,2021,57(05):168-174. DOI： 10.13296/j.1001-1609.hva.2021.05.024.

GUO Chao, ZHOU Bo, TAN Xuemin, et al. Online Detection and Disassembly Analysis on Floating Discharge Defect in GIS Disconnector[J]. High voltageapparatus, 2021, 57(5): 168-174. DOI： 10.13296/j.1001-1609.hva.2021.05.024.

摘要

GIS是电网中负责电能分配与故障切除的重要设备。为了在不停电条件下获取GIS设备内部状态量

提前发现并预警设备缺陷

避免设备故障与电网事故

通过超声波、特高频、振动与气体分解产物法对GIS进行带电检测

结合电磁场理论对测试信号进行了分析

利用电容分压原理和化学反应方程式解释了放电原因与发展过程。带电检测发现110 kV GIS母线PT隔离开关内部存在振动与放电现象

停电解体后发现隔离开关内动触头处拨叉、舌簧与传动销存在烧蚀痕迹

同时放电点附近存在大量金属硫化物粉末。分析放电原因为舌簧压紧力不足导致拨叉、舌簧与传动销接触不良导致悬浮放电。停电解体结果验证了带电检测手段的有效性

同时避免了放电进一步发展导致母线非计划停电的严重事故。

Abstract

GIS is the important equipment which is responsible for power distribution and fault cleaning. For obtaining the inner state variables of GIS equipment at on line condition

discovering and alerting the equipment defect as well as avoiding equipment failure and grid accident

the GIS is subject to on line detection by the ultrasonic

ultrahigh frequency

vibration measurement and gas decomposition product. The test signal is analyzed with combination of electromagnetic field theory. The reason of discharge and its development process is explained by capacitive division principle and chemical reaction equation. It is found by the on line detection that inner vibration and discharge phenomenon exist in the PT disconnector of 110 kV GIS.It is also found after the power off and disassembly that the ablation trace was found on the fork

tongue spring and drive pin in the moving contact of the disconnector and

at the same time

a large number of metal sulfide power is found near the discharge point. The reason of the discharge by analysis is the floating discharge is due to weak contact of the fork

tongue spring and the drive pin by insufficient pressing force of the tongue spring force. The effectiveness of the on line detection measures is verified by the off line detection result and

at the same time

the severe accident of unplanned outage of busbar caused by the discharge is avoided

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