基于负序电压的配电网故障定位方法

A Fault Location Method for Distribution Network Based on Negative Sequence Voltage

结合我国配电网的实际情况,文章提出一种能够确定配电网故障点确切位置的实用方法,此方法通过比较各节点负序电压确定故障区段,并将故障区段始端负序电压与本线路始端和末端短路时的故障负序电压进行运算得出故障点距离。此方法适用于配电网的各种短路故障的定位,并可应用于故障的自动在线检测。

Combining with the practical situation of the distribution networks in China,a practicable method that can find out exact position of faulty point in distribution network is proposed.The method determines the fault section by comparing the negative sequence voltage of each node,and obtained the fault point distance by comparing the negative sequence voltage at the beginning of the fault section with the fault negative sequence voltage when the short circuit fault occurs in the beginning and the end of the line.The method is suitable to the location of various short-circuit faults occurred in distribution networks with the isolated neutral system,and can be applied to the automatic online detection of the faults..