利用双端不同步数据的高压输电线路故障测距实用算法及其实现

利用单侧电压电流工频分量的输电线路故障测距算法，进行双原系统的线路故障定位时，远端系统等值阻抗变化对测距精度的影响时我法克服的。中提出一种双电源系统的高压输电线路故障定位的实用算法，其特点为：（１）两端数据不必同占；（２）用于短、中等长度线路时，不需要迭代求解，即定位方程为一个算式；（３）不需要区分故障类型；（４）该方法适用于换位线路、不换位线路以及双回线路。

STUDY ON PRACTICAL FAULT LOCATION ALGORITHM FOR TWO-TERMINAL HV AND EHV TRANSMISSION LINES USING ASYNCHRONOUS DATA AT BOTH ENDS

When the fault location algorithm of transmission line based on the fundamental frequency component of voltages and currents at one terminal is used to locate the faulty position in two terminal transmission line, it is impossible to overcome the influence of equivalent impedance variation of remote source on the accuracy of fault location. Using the asynchronous voltage and current at both ends, a new practical fault location algorithm for two terminal transmission lines is presented in this paper. This algorithm has the following characteristics: (1) The measurements at both terminals of the transmission line are not required to be synchronized. (2) This algorithm is simple and non iterative for the short or middle length of transmission line. (3) This method is independent of the fault type. (4)for long lines, double circuit lines as well as transposed and non transposed lines.This method is suitable. A large amount of results of transient simulation show that this algorithm has higher accuracy of fault location.