电压互感器二次回路接地点查找方法的改进

摘要

电压互感器二次回路在运行中可能出现两（多）点接地故障。比较了传统电压互感器二次回路接地点查找的几种方法,在理论推导的基础上设计了电压互感器二次回路接地点的检测电路,从而提出一种改进的方法。与传统的查找方法相比,所述的新方法具有原理清晰、操作简单、不易出错的特点。%It is possible for voltage transformer＇s secondary circuit to have two/multi-point grounding in operation.Comparing the several traditional methods for searching the grounding points,and based on theoretical analysis,this paper designs a detection circuit for the grounding points of the secondary circuit,and thus proposes an improvement method.The proposed new method is of clear principle,simple operation and less error in comparison with the traditional methods.