基于暂态零序电流特征的小电流接地系统选线的应用方法

摘要

小电流接地选线是个难点，采用暂态零序电流的故障特征，实现小电流接地选线是目前配电网的研究热点。在分析小电流接地系统的基本故障特征、零序电流暂态特征和特征频带（SFB）内的相频特性的基础上，介绍了一种基于暂态零序电流特征的选线算法。并对应用中的一些问题做了细致分析，以期能达到借鉴作用。%The small current grounding line selection is difficult,using transient zero sequence current fault features to implement the small current grounding line selection is the research focus in the distribution network. In the analysis of small current grounding system of basic failure characteristics,the zero sequence current transient and characteristic band (SFB) within the phase frequency characteristics of the basis,this paper introduces a kind of routing algorithm based on transient zero sequence current characteristics. The application and some problems are analyzed thoroughly,and the results can be used for reference.