基于小波分析的电压闪变信号拟同步检波的峰值比较法

A simulating synchronous wave detection method for the detection of voltage flicker signal wavelet packet analysis

提出了用小波分析的峰值比较法和拟同步检波的电压闪变信号检测新方法。该方法用软件来模拟硬件的同步检波,大大地减少了投资成本;用小波子带滤波器代替传统的低通滤波器,不仅能够对电压闪变信号进行不失真的包络检测,且能够检测出电压闪变信号发生的时间、频率以及幅值。仿真结果表明,该方法对电压闪变信号检测和时频分析性能良好,特别适用于突变的、非平稳的电压波动与闪变信号的检测。

This paper proposes a new method for the detection of voltage flicker signal,which uses DWT peaks analysis and simulating synchronous wave detection detection.It using soft program to take the place of the hard device for synchronous detector,which decreases the cost greatly;using DWT instead of traditional low-pass filter,which not only can achieve the real synchronous wave detection of voltage flicker,but also can detect the time,frequency and amplitude of the signal.The result of simulation show that this method has good performance of detection and time-frequency analysis,and it can be used in the change detection of the sharp non-stationary voltage and flicking signal.