基于小波变换的煤矿电缆行波故障测距的研究

Study of Traveling Wave Fault Location in Mine Power Cable Based on Wavelet Transform

矿井配电网是单端供电系统,其中性点不接地或通过消弧线圈接地,当出现单相接地故障时,由于故障电流微弱,故障点位置很难查找。为解决这个问题,采用行波测距法通过检测故障点初始行波和故障点二次反射波分别到达母线检测点的时间来进行故障测距,该算法极大的提高了测距的可靠性。仿真结果证实了该方法的有效性和可行性。

The mine distribution network is a one-terminal power network, when faults occur, fault current is weak, and it is very hard to locate the fault position. Inn order to solve the problem of fault location in mine power network, single-end traveling wave fault algorithm is presented,which uses the time difference between initial fault traveling wave and reflected wave from the fault point that get to the detecting bus, this algorithm raises the dependability of the fault location. Simulation results confirmed...