基于双端不同步采样数据的高压输电线路故障测距

A fault location algorithm for HV transmission line based on two-terminal asynchronous data

提出了一种基于双端不同步采样数据的高压输电线路故障测距算法。该算法考虑了线路的分布参数特性,利用线路双端电压和电流量进行故障测距,从而保证测距不受过渡电阻的影响。对于不换位三相线路,采用模分量法,使相互耦合的相空间三相线路解耦为相互独立的模量。为了避免求解导数的复杂性,该文采用Powell方向加速法进行求解。仿真计算表明,算法对整个线路长度区间内的任何故障点都能精确测距。

This paper presents a fault location algorithm for HV transmission line based on two-terminal asynchronous data. The distributed parameter line model is used for the proposed algorithm. It is applicable for long distance lines since shunt capacitance is taken into account. Considering the effect of fault resistance, the technique utilizes asynchronous samples from both terminals. To eliminate the effect of untransposed line, phase components are transformed to modal components. Then the coupled three-phase components are transferred to the decoupled modal components. Powell＇s direction acceleration method is used in this paper to avoid the complexity of derivation. The simulation results show that the fault location is feasible at any point on the whole line.