基于S变换的输电线路故障行波测距仿真分析

Simulation Analysis of Transmission Line Fault Location Based on S-transform

S变换可以独立地分析信号各个频率分量上的幅值随时间变化的特征,从而准确判断出行波信号的突变时刻,达到对波头进行准确标定的目的。提出一种基于S变换的行波波头识别方法,与现有的小波变换波头识别方法相比较有明显的优势,并通过EMTP及MATLAB仿真计算进行验证。

This paper presents a method for recognizing traveling wave head based on S-transform,the S-transform can independently analyze the characteristics of the amplitude over time on each frequency component of the signal,so as to accurately determine the sudden change of the traveling wave signal,to achieve the purpose of accurate calibration of the wave head.compared with the existing wavelet transform,the method has obvious advantages,EMTP and MATLAB simulation calculations also validate this.