基于双频法的树形配电线路单相断线兼接地故障诊断

FAULT DIAGNOSIS FOR LINE OPEN WITH LINE TO GROUND ON RADIAL DISTRIBUTION NETWORK BY METHOD OF DOUBLE FREQUENCY DIAGNOSIS

针对树形配电线路特点，建立分布参数电路模型。利用故障后线路起始端的电压、电流相量，提出了树形配电线路单相断线兼接地故障定位新算法。本方法将始端相量逐分支向后传递，故障点逐分支搜索的方法实现故障测距，并利用双频法识别真伪故障。大量计算机仿真表明该方法有效。

Based on distributed parameter circuit model constructed according to the characteristics of the radial distribution network,this paper presents a new algorithm for line open with line to ground fault location.The algorithm utilizes post fault voltage and current phasors at inital end.By the way of phasors at inital end transmitted sectionally,searching fault branch by branch and verifying fault branch by double frenquency method a lot of fault diagnosis simulation by computer shows that the algorithm presented in this paper is effective.