配电网故障区段定位及测距方法

Fault section positioning and ranging method of distribution network

针对配电网发生单相接地故障后采用人工巡线定位故障困难的问题,提出了一种基于分布参数模型的配电网故障区段定位及测距方法。该方法通过对线路上馈线终端装置上传的故障信息及数据进行分析计算,选择故障区段,然后在线计算该区段线路分布参数,从而得出故障距离。仿真结果表明,该方法受过渡电阻和故障位置等因素影响小,能有效实现故障选线和区段定位,测距误差在1%以内。

In view of problem that it is difficult to realize fault positioning by use of artificial patrol after single-phase grounding fault occurred in distribution network, a fault section positioning and ranging method of distribution network based on distributed parameter model was proposed. In the method, fault section is chosen through analyzing and calculating of fault information and date uploaded by feeder terminal unit of line, and fault distance is obtained by online calculating distributed parameters of the section line. The simulation results show that the method is less affected by factors of transition resistance and fault location, which can effectively realize fault line selection and section positioning within l~/00 ranging error.