高压输电线故障测距中的伪根问题及其改进方法

False Root and Its Modification for Fault Locating on Electric Power Transmission Lines

本文对故障电流相位修正测距算法进行了分析讨论。理论分析和数字仿真计算均表明该算法在原理上存在一定缺陷,在某些情况下可能会给出错误的测距结果。为此,本文提出了解方程算法及附加判据。利用该方法可更为可靠、准确地实现故障点定位。

In this paper the fault locating algorithm based on phase angle modification of the-fault current component is discussed. It is shown that the algorithm is not perfect in principle and may provide wrong estimate result of the fault distance in some cases In view of this, a modified method is developed in the paper and it can be used as accurate algorithm for fault locating.