220kV线路保护区外故障误动分析  

Analysis of 220 kV Transmission Line Protection Misoperation at External Fault

作　　者：杨绍远[1] 杨雪飞[1] 

机构地区：[1]中国南方电网超高压输电公司柳州局,广西柳州545006

出　　处：《广西电力》2012年第2期69-70,共2页Guangxi Electric Power

摘　　要：某500 kV变电站的220 kV线路在区外故障时发生跳闸,为了查清跳闸原因,对保护装置进行了检查、试验和分析,并查看了故障录波图,找到了该线路主二保护光纤电流差动保护误动的原因,是由于装置交流采样插件接触不良引起。更换了相关的插件,并提出了相应的防范措施,以避免同类故障的再次发生。A 220 kV transmission line from a certain 500 kV substation tripped at external fault. In order to find out reason,the protection equipment was checked, test and analyzed, and the fault recorded waveform was checked. The reason of the misoperation of the transmission line＇s main second protection optical fiber current differential protection was found which was the poor contact of AC sampling plug-in unit of the equipment. The plug-in unit was replaced and measures were proposed to avoid such faults.

关 键 词：线路保护 区外故障 误动分析 防范措施 

分 类 号：TM733[电气工程—电力系统及自动化]