小电流接地故障暂态分析及应用探究

Transient Analysis of Small Current Grounding Fault and Its Application

在小电流接地系统发生接地故障时,由于系统电流微弱,使用传统稳态方法很难发现故障点。为了及时准确地判断故障线路,本文首先分析了小电流中性点不接地系统发生接地故障时的暂态过程,然后在此基础上对暂态零序功率方向在选线技术上的应用进行了原理介绍,最后对该方法的主要优劣势进行了分析。

In the small current grounding system ground fault occurs,as weak current system,the use of traditional static methods can be difficult to find fault point,in order to timely and accurately judge the fault lines,this paper through the analysis of the small current grounding system not when earthing fault occurring in the transient process,and on this basis of transient zero sequence power direction in the application of line selection technology,principle and method of its application has carried on the brief description,and finally analyses the main disadvantages of this method.