小电流接地系统单相接地故障选线方法分析

Selection methods of single phase grounding fault line in small current neutral grounding system

我国大多数配电网广泛采用小电流接地系统,此类系统发生故障最多的是单相接地。如何快速准确地检测出故障线路一直是一个重要的研究课题。本文介绍了有关小电流接地系统单相接地故障选线方法,对现有的一些选线原理做了系统的归纳,并且进行了分析和比较,提出了尚需解决的问题。

Small current neutral grounding system is widely used in distribution power system in China and the singlephase grounding fault happens most frequently in distribution system. Thus how to detect the fault line quickly and accurately is an important issue. Methods of fault line selection for single-phase to ground fault in indirectly grounding power system is presented. The existing theories of the fault line selection methods are summarized. At the end, ways to solve the problem were proposed.