中文摘要：

从高压输电线路故障时只有故障点电压幅值相等的原理出发，分析了该测距算法产生伪根的原因，利用输电线路分布参数模型沿线幅值变化规律来缩小故障测距范围，从而规避产生伪根的可能，在此基础上，提出了一种基于高压输电线路双端故障测距算法的通用伪根判别方法，ATP仿真和相应的Matlab计算程序验证了该方法的可行性。

英文摘要：

According to the principle that only the fault point＇s voltage amplitude of the fault line is equal, why the location algorithm causes false roots was analyzed. And based on the distributed parameter transmission line model, the false root could be avoided by using the amplitude changing law along the line to reduce the fault location range. On the basis, a general false root determination method based on two-terminal fault location algorithm for high voltage transmission line was proposed. The feasibility of the method was validated through ATP simulation and relevant Matlab computing procedures.