基于电流行波的三端测距新方法研究

Research on A New Method of Three-terminal Fault Location Based on Current Traveling Waves

电力系统中波速不确定性给行波测距带来了一定误差,单、双端故障测距要么存在采用固定波速造成误差的问题,要么存在第二波头检测困难问题。本文提出了一种既避免了采用固定波速误差问题又避免了第二波头检测问题的三端测距新方法。仿真结果表明该方法精确度较高,符合工程标准。

In the power system,the uncertainty of wave speed of traveling wave to bring a certain deviation. On the one hand, single and double terminal fault location cause either a fixed velocity error. On the other hand,the existence of second wave head detection problem. A new three-terminal fault location method is proposed in this paper. It can avoid the problem of fixed wave velocity error. In addition, it also avoid the second wave head detection problem. The simulation results show that the method is of high accuracy and which can meets the engineering standards well.