基于两端量线路故障测距新算法

提出了基于两端量实现线路故障测距的算法。该算法选用适用于各类型故障的正序网进行计算，利用线路两端电压、电流与故障点电压的向量关系，建立双端量测距方程式，并利用方程式两端向量模相等关系实现故障测距计算，测距精度不受过渡电阻和系统运行方式的影响，且不需要线路两端数据采样同步。经实例验证，测距误差小，测距快速方便。

Line fault locating algorithm based on parameters of both terminals

A fault locating algorithm based on the parameters at both terminals of a power line is brought forth.It selects the positive sequence net in calculation,which is suitable for different fault types.It establishes fault locating formula using the vector relationships between the fault point voltage and the voltages and currents at both terminals of the power line.The fault distance is calculated by making the vector moduli of two formula sides equal.This algorithm is simple,fast and easy.The transient resistance and system operating mode have no influence on it and the synchronized data acquisition of both terminals is not necessary.The experiments show that it has high accuracy.