一种小电流接地系统单相接地故障精确定位方法

A Precise Location Method of Single-phase Grounding Fault in Small Current Grounding System

在小电流接地系统运行过程中,最为常见的故障便是单相接地故障。一旦电力系统运行期间出现接地故障问题,电力系统的安全以及日常用电的安全性都会受到极大影响。提出一种小电流接地系统单相接地故障精确定位方法,根据采集的母线及线路末端故障相电压可以计算出故障点到母线及线路末端距离比值,进一步可以计算出故障点到母线距离。

In the operation of small current grounding system,the most common fault is singlephase grounding fault.Once the grounding fault occurs during the operation of the power system,the safety of the power system and the safety of daily power consumption will be greatly affected.This paper presents an accurate location method of single-phase grounding fault in small current grounding system.According to the collected fault phase voltage of bus and line end,the distance ratio from fault point to bus and line end can be calculated,and further the distance from fault point to bus can be calculated.