采用小波分解和同步检波的电压闪变信号检测新方法

本文提出了一种新型同步检波器，用子带滤波器取代了传统同步检波器中的低通滤波器。在此基础上，提出了采用小波多分辨率信号分解和同步检波的电压闪变信号检测新方法。该方法不仅能够对电压闪变信号进行不失真地包络检波，而且能够精确地检测电压闪变信号的时间和包络信号的发量及其幅度。仿真实验结果表明，该方法具有良好的检测和时频分析性能，适用于突变的、非平稳的电压波动与闪变信号的检测。

A NEW METHOD FOR THE DETECTION OF VOLTAGE FLICKER USING WAVELET TRANSFORM AND SYNCHRONOUS DETECTION

This paper proposes a novel synchronous detector,which use wavelet filter instead of traditional low pass filter.On the basis of this,we also proposes a new method for the dections of voltage flicker using wavelet multiresolution signal decomposition and synchronous detection.This method not only can achieve the distortionless envelope detection of voltage flicker,but also can detect the time,frequency and amplitude of the signal accurately.The result of simulation show that this method has good performance of detection and time frequency analysis,and it can be used in detection of the sharp,non stationary and flicking signal changes.