一起雷击引起串联补偿装置故障的分析  

Analysis of series capacitor compensation device locked caused by a lightning strike

作　　者：闫斌斌 叶德武 葛亮 郜磊 王曦 YAN Binbin;YE Dewu;GE Liang;GAO Lei;WANG Xi(State Grid Transmission Maintenance Company of Shanxi Province,Taiyuan 030000,China;Fushun Power Supply Company,Liaoning Electric Power Company Limited State Grid,Fushun 113006,China)

机构地区：[1]国网山西省电力公司输电检修分公司,山西太原030000 [2]国网辽宁省电力有限公司抚顺供电公司,辽宁抚顺113006

出　　处：《电气应用》2021年第9期67-72,87,共7页Electrotechnical Application

基　　金：河北省自然科学基金(NO.E 2018502134)。

摘　　要：串联电容补偿装置作为高压输电系统中关键的无功调节设备,其运行的可靠性尤为重要。针对一起雷击接地故障引起的500kV线路串联电容补偿装置C相电容器组起火的质量事件,导致串补不平衡电流高值保护动作,串补重投不成功。通过对串联补偿装置保护动作情况和电容器组电容量测量数据的分析,查明事件原因为雷击使电容器单元两端电压瞬间升高发生击穿故障和电容器组桥臂并联电容器单元太多发生外壳爆破。结合原因提出了故障处置方案和相应的预防措施。As a key reactive power regulating device in high voltage transmission system,ITS reliability of series capacitor compensation is very important.Aiming at the event of500 k V line series capacitor compensation device c phase capacitors,which results in unsuccessful reclose of series compensation after the action of imbalance current high value protection due to the fault.By analyzing the protection of the series compensation device and the capacitance of the capacitor bank,it is found that the causes of the event is lightning strike causing capacitor unit instantaneous voltage and breakdown fault and too many shunt capacitor units in the bridge arm of the capacitor bank.Combined with the causes,the disposal scheme and corresponding preventive measures are put forward.

关 键 词：串联电容补偿装置 质量事件 不平衡电流 高值保护 

分 类 号：TM761.12[电气工程—电力系统及自动化]