基于暂态电流的高压输电线的故障检测

针对高压输电线故障存在检修困难、故障点定位误差较大和易受外部因素影响等问题，本文根据行波传输理论以故障电流行波为测量对象，提出一种基于暂态电流的高压输电线路单端故障测距算法。现以某区电网高压输电线路故障为例，利用MATLAB构建仿真模型进行仿真。由仿真结果可以看出：所采用的故障测距算法不仅计算简单，而且测距精度较高。

The Fault Location of High Voltage Transmission Line Based on Transient Current

According to the theory of travelling wave transmission,this article puts forward the single-ended fault location algorithm of high voltage transmission based on transient current,which isn’t affected by the line wave velocity.The method mainly aims at the problems that the faults of high voltage transmission line are difficultly inspected by the artificial and affected easily by natural factors, whose error is bigger in positioning the fault point.This article takes the high voltage transmission line fault of a district power grid for example to build a simulation model for simulation and analysis by MATLAB. The algorithm of fault location adopted by the article is effective and able to improve the precision of ranging by the results of simulation and analysis.