GIL局部放电检测与精确定位案例分析  

Case Analysis of GIL Partial Discharge Detection and Precise Positioning

作　　者：曹春岩 胡勇 CAO Chunyan;HU Yong(Wudongde Hydropower Plant,Kunming 651500,China;Global Science and Technology(Shanghai)Co.,Ltd.,Shanghai 201210,China)

机构地区：[1]乌东德电厂,云南昆明651500 [2]上海格鲁布科技有限公司,上海201210

出　　处：《电工技术》2025年第3期12-16,共5页Electric Engineering

基　　金：三峡金沙江云川水电开发有限公司禄劝乌东德电厂资助“500 kV GIS/GIL局部放电信号高精度定位与处理策略研究”(编号5223020021)。

摘　　要：GIL设备运行优势突出,在电力系统中得到了广泛应用。但是,GIL设备运行环境复杂,且单个气室较长,故障检修难度大,周期长,因此对GIL设备内部局部放电缺陷开展检测诊断和精确定位至关重要。介绍了两起GIL局部放电检测和定位的案例,故障位置均发生在GIL内部三支柱绝缘子处,都是通过特高频在线监测手段报警和人工带电检测复核进行确认的,最终通过更换故障部位和解体检查验证了局部放电检测和定位结果的准确性,局部放电检测、定位过程可以为GIL设备的运维提供一定参考。GIL equipment has outstanding operational advantages,it has been widely used in power systems.However,the operating environment of GIL equipment is complex,and the single air chamber is long,so there exits some problems of high difficulty and long circle of maintenance.Therefore,it is essential to carry out detect,diagnose,and accurately locate of internal partial discharge defects in GIL equipment.This article has provided a detailed introduction to two cases of GIL partial discharge detection and positioning,the fault locations occurred at the three post insulators inside the GIL,and were confirmed through ultra-high frequency online monitoring methods and manual live detection review.Finally,the accuracy of the partial discharge detection and localization results was verified by replacing the faulty parts and disassembling for inspection.The partial discharge detection and localization process in this article can provide some reference for the operation and maintenance of GIL equipment.

关 键 词：GIL 局部放电 检测 定位 

分 类 号：TM835[电气工程—高电压与绝缘技术]