基于多频测相和行波测距法的电缆故障定位方法

Cable Fault Location Method Based on Multi-frequency Phase Measurement and Traveling Wave Distance Method

借鉴于相位法激光测距的原理,提出一种利用多频行波的相位差对电缆进行故障定位的方法,即通过对比不同频率的发射信号与故障点反射信号之间的相位差得到故障点位置;并给出频率的确定方法。针对该方法对SIMULINK平台搭建的电缆故障模型在不同故障类型下进行仿真,结果表明电缆故障定位的相对误差能达到1%以下,证明了该方法的可行性。

A cable fault location method is proposed by using the phase difference of the multi-frequency traveling wave,that is,by comparing the phase difference between the transmission signal and the fault point reflection signal at different frequencies.And the way how to choose the frequencies is also proposed.According to this method,the cable fault model built on SIMULINK platform is simulated under different fault types and the simulation results show that the relative error rate of the cable fault location can be reduced to1%or less by using the phase method,which proves the feasibility of the method.