基于数学形态学的HVDC线路单端行波测距算法

Single terminal traveling wave based fault location of HVDC transmission lines using mathematical morphology

在介绍单端行波测距原理和数学形态学算法的基础上,提出了一种利用数学形态学梯度技术分析故障暂态信号的方法.该方法利用数学形态学梯度变换分离正、反向电压行波浪涌,不但能够取得暂态行波中信号突变点的时刻,还具有一定的抗干扰性.PSCAD仿真结果表明这种方法是可行的,且测距可靠性强,测距精度高.

This article introduced single terminal principle and mathematics morphology,and proposed a method to analyze the fault transient signals with mathematical morphological grads.This method separates forward and reverse traveling wave by mathematical morphological grads transform,which can not only detect the moment of signal mutation in transient traveling wave,but also have certain capability of interference rejection.Simulations with PSCAD show that this method is feasible,reliable and accurate.