时频分析方法在暂态电能质量扰动中的分析与应用

Analysis and Application of Time-frequency Analysis Method in Transient Power Quality Disturbance

本文主要利用S变换方法来检测暂态电能质量扰动的开始时刻、终止时刻及暂态电能质量扰动信号的幅频特性。通过结果分析和数值模拟仿真表明该方法能够精确的检测到暂态电能质量扰动发生的时间和持续的时间,并且能够简单直观的检测到扰动信号的频谱信息。结论表明,时频分析方法能够对暂态电能质量扰动信号进行有效分析,具有一定的经济价值和现实意义。

This report tells the methods named S transformation which can help us test the starting time,the ending time,frequency and amplitude characteristics of common transient power quality signal disturbance.From the error analysis and simulation we can detect the disturbance occurred time and duration accurately,with that the identification and determination of disturbance can be simple and intuitive.This method has a economic importance and realistic significance.