中性点非直接接地系统的单相接地故障测距新算法

A New Fault Location Algorithm for Single-Phase-to-Earth Fault in Non-Direct-Grounding Neutral System

提出一种利用输电线路单端电压及电流的测量值来进行精确故障定位的新算法。该算法通过采用线路的分布参数模型 ,精确考虑了分布电容对测距算法的影响 ,从而大大提高了测距算法的精确度。该算法通过EMTP仿真验证 。

A new fault location algorithm is presented which uses voltage and current values measured from single terminal of faulted transmission line. The distributed model of transmission line is applied and the effect of capacitance on it is precisely considered, its precision is hence greatly enhanced. The method has been simulated by EMTP and proved very accurate.