一起220kV变电站线路闸刀设备异常事故的分析与思考  

Thought and Analysis of an Abnormal Fault for the Kinfe Switch of 220kV Substation Lines

作　　者：邱夷舜 赵旭州 周刚 郭晓 左璇 QIU Yi-shun;ZHAO Xu-zhou;ZHOU Gang;GUO Xiao;ZUO Xuan(State Grid Jiaxing Comprehensive Energy Service,Jiaxing 314000,China;Jiaxing Power Supply Company,Jiaxing 314000,China)

机构地区：[1]国网嘉兴综合能源服务有限公司,浙江嘉兴314000 [2]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314000

出　　处：《电气开关》2024年第3期108-111,共4页Electric Switchgear

摘　　要：对220kV某变电站线路闸刀设备异常事故进行分析和讨论,针对该线路闸刀进行间隙检查、机械特性检查,结合现场检查、测量及各类测试结果进行分析后发现引起此次事故的根本原因是B相连杆因卡簧生锈断裂脱开导致闸刀B相实际未合上。针对此次事故进行了严谨的分析并对该批次闸刀拐臂提出了多项解决措施和建议,提高了设备的可靠性,满足电网正常运行。This paper analyzes and discusses the abnormal accident of switch equipment in a 220kV substation.According to the clearance inspection and mechanical characteristics inspection of the line knife,combined with the field inspection,measurement and various test results,it was found that the root cause of the accident was that the B connecting rod was disconnected due to the rust and fracture of the snap spring,resulting in the actual unclosed phase B of the knife.This paper makes a rigorous analysis of the accident and puts forward a number of solutions and suggestions for this batch of knife crank arm,which improves the reliability of the equipment and meets the normal operation of the power grid.

关 键 词：变电站 GIS断路器 线路闸刀 锈蚀 

分 类 号：TM63[电气工程—电力系统及自动化]