变电站压变二次回路两点接地造成的异常现象分析  

Analysis of Anomaly Caused by Two-point Grounding of Secondary Circuit in a Substation

作　　者：沈蛟骁 高璐 余嘉彦 SHEN Jiaoxiao;GAO Lu;YU Jiayan(Suzhou Power Supply Company,State Grid Jiangsu Electric Power Company,Suzhou 215000,China)

机构地区：[1]国网江苏省电力有限公司苏州供电分公司,江苏苏州215000

出　　处：《电工技术》2024年第4期162-164,共3页Electric Engineering

摘　　要：目前线路保护原理更多地使用自产零序电压,电压互感器的开口三角重要性不断下降,其电压二次回路的绝缘也可能被忽视。介绍了一起变电站开口三角次级两点接地故障,分析了不同保护装置电压波动、异常的原因,对后续类似故障的判别具有借鉴价值。At present,use of self-produced zero sequence voltage is prevailing in line protection principle.Importance of the opening triangle of voltage transformer is decreasing,and insulation of its voltage secondary circuit may also be despised.This paper reports a case of two-point grounding faults of the secondary opening triangle in a substation,and analyzes the causes of voltage fluctuations and abnormalities of different protections,which is valuable for the subsequent identification of similar faults.

关 键 词：电压互感器 开口三角次级 两点接地 

分 类 号：TM07[电气工程—电工理论与新技术]