小电流接地系统故障选线方法综述

Summary of Fault Line Selection Methods for Small Current Grounding System

在铁路供配电系统中,广泛采用非直接接地系统即小电流接地系统。而此类系统发生最多的是单相接地故障,如何快速准确地检测出故障线路一直是电力系统继电保护的重要研究课题。文中对现有的各种选线原理和方法进行了系统归纳和比较,提出尚需要解决的问题。

In the railway power supply and distribution system,the indirect grounding system is widely used,that is,the small current grounding system.Single phase to ground fault is the most common fault in this kind of system.How to detect the fault line quickly and accurately has always been an important research topic of power system relay protection.In this paper,the existing principles and methods of line selection are systematically summarized and compared,the problems to be solved are put forward,and some conclusions are given.