采用小波包分析和拟同步检波的电压闪变信号检测新方法  

Detection of voltage flicker using wavelet package analysis and simulating synchronous detection

作　　者：张宇辉[1] 陈晓东[1] 刘思革[1] 

机构地区：[1]东北电力学院,吉林吉林132012

出　　处：《继电器》2004年第3期6-9,共4页Relay

摘　　要：提出了用小波包分析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,大大减少了投资成本;用小波包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,而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,which uses wavelet package analysis and simulating synchronous detection. It uses soft program to simulate synchronous detection of the hard device, which decreases the cost greatly; and uses wavelet package instead of conventional low-pass filter, which not only can achieve the real envelope detection of voltage flicker, but also can detect the time, frequency and amplitude of the signals.Simulation results show that this method has good performances of detection and time-frequency analysis, and it is very applicable in the detection of the sharp and non-stationary voltage fluctuating,and flicker signals.

关 键 词：电力系统 小波包分析 拟同步检波 电压闪变信号 检测 

分 类 号：TM933.2[电气工程—电力电子与电力传动]