电压互感器二次回路接地研究  

Research on Multiple Earth in Voltage Transformer Secondary Circuit

作　　者：张帆[1] 李一泉[1] 袁亮荣[1] 阚瀛[2] 

机构地区：[1]广东省电力调度中心,广州510600 [2]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《广东电力》2008年第4期5-9,14,共6页Guangdong Electric Power

摘　　要：针对电网内发生的电压互感器二次回路两点(多点)接地导致继电保护装置误动作的问题,结合近两年发生的事故案例进行分析,发现防护装置的选型未有明确的参考标准。据此,结合当前实际,提供了一种基于持续运行电压的实用选型方法,可较好地解决此类问题。Instance analysis is made on the misoperation of relay protection caused by two-point （multiple） earth in voltage transformer secondary circuit. It is found that there are no explicit reference standards on the selection of electric discharge gap, etc., Combined with the present situation, a practical selection method is offered based on continuous operating voltage to effectively solve such problems.

关 键 词：电压互感器 二次回路 两点接地 放电间隙 工频参考电压 持续运行电压 

分 类 号：TM451[电气工程—电器] TM63