220 kV交流双回线路同时跳闸故障分析  

Analysis of a 220 kV AC Double Circuit Line Simultaneous Tripping Accident

作　　者：崔宇杭 张岩坡 张韶光 王会增 CUI Yuhang;ZHANG Yanpo;ZHANG Shaoguang;WANG Huizeng(State Grid Hebei Extra High Voltage Company,Shijiazhuang 050071,China)

机构地区：[1]国网河北省电力有限公司超高压分公司,河北石家庄050071

出　　处：《河北电力技术》2024年第5期61-64,共4页Hebei Electric Power

摘　　要：雷击跳闸是线路跳闸的主要原因,故障分析是确定故障点和解决故障的重要环节。首先,以一起雷击引起的220 kV交流双回线路同时跳闸的故障为例,梳理涉及到线路保护单跳单重、远跳动作以及由于开关燃弧引起母差保护跟跳动作、母差失灵保护动作等;然后,基于录波波形和保护动作原理,采用故障状态划分的方法分析故障过程;最后,结合现场实际情况对保护动作正确性进行分析,结果表明:该方法可以清晰地分析出故障过程及保护动作的正确性,为现场人员分析复杂的跳闸事故提供参考。Lightning strike tripping is the main cause of line tripping,and fault analysis is an important link to determine the fault point and solve the accident.This article takes a 220 kV AC double-circuit line simultaneous tripping accident due to lightning strike as an example,the involved single-phase action single-phase reclosing,remote tripping action,and bus differential protection follow-up action,bus differential failure protection action are organized.Then,the tripping process according to the method of dividing states is analyzed based on waveform recording and protection action principles.Finally,the correctness of the protective action based on the actual situation is analyzed.The result shows that the above method can be used to clearly analyze the protection tripping and the correctness of protective actions,providing reference for on-site analysis of complex tripping accidents.

关 键 词：雷击跳闸 开关燃弧 失灵保护动作 

分 类 号：TM769[电气工程—电力系统及自动化]