一起220 kV GIS母联电流不平衡分析及建议  

Analysis and Suggestion on a Case of Three-phase Current Imbalance Fault Encountered by a Bus-tie Breaker in 220 kV GIS System

作　　者：王世涛 冉月 蔡旭斐 凌博文 WANG Shitao;RAN Yue;CAI Xufei;LING Bowen(State Grid Shanghai Extra High Voltage Company,Shanghai 200433,China)

机构地区：[1]国网上海超高压公司,上海200433

出　　处：《电工技术》2024年第21期170-172,175,共4页Electric Engineering

摘　　要：针对GIS在运行中发生三相电流不平衡的事故,对GIS设备运行时三相电流波形进行分析,并进行X光检测及设备解体检查,结果表明事故是由GIS隔离开关设计缺陷、设备内部机械磨损导致隔离开关B相分闸异常引起的。针对此问题,建议厂家从设计及安装工艺上进行改进,同时对目前运行设备加强监视,并缩短设备检修周期。This essay reports the handling and causal analysis with respect to a case of three-phase current imbalance fault encountered by an operating gas insulated switchgear(GIS).The analysis carried out was on GIS three-phase current waveform,and the examinations performed were X-ray inspections and equipment disassembly check.It could be concluded that the three-phase current imbalance was caused by B-phase opening abnormality of the GIS disconnector which resulted from design defects and internal mechanical wear.To solve this issue,it is suggested that manufacturer should improve in the design and installation process,and users should closely monitor currently operating equipment and adopt more frequent equipment maintenance.

关 键 词：三相电流不平衡 气体绝缘组合电器 X光检测 分闸异常 

分 类 号：TM595[电气工程—电器]