小电流接地选线装置运行现状分析

The Analysis of Fault Line Identifying Apparatus in the Small Current Grounded Networks

小电流接地选线对防止单相故障的扩大起重要的作用,但在实际运行中的效果却不尽人意。本文通过分析各种小电流接地选线装置的原理,结合小电流接地系统中单相接地故障的特点,指出了装置在运行中出现的问题的原因,提出了解决问题的措施。

Fault line identifying apparatus plays an important role in preventing single phase from earth fault growing to two or there phases fault, but in fact the effect is not so good as expected. In this thesis, the reasons for the trouble of the line identifying apparatus are presented by analyzing the principle of different type unit and the characteristics of the earth faults. The methods for solving the problems are also presented.