基于小波包变换的暂态电能质量扰动信号分析  

Power Quality Disturbance Signal Analysis Based on Wavelet Packet Transform in Transient

作　　者：刘子洋[1] 王桂英[1] 吴鹏飞[1] 

机构地区：[1]沈阳农业大学信息与电气工程学院,沈阳110161

出　　处：《沈阳农业大学学报》2013年第1期118-121,共4页Journal of Shenyang Agricultural University

基　　金：辽宁省教育厅项目(L2012250)

摘　　要：暂态电能质量问题在当今电能质量问题中变得越来越重要。针对暂态电能质量扰动信号,通过小波包变换对扰动信号进行时间定位和消噪并对产生数据加以比较,确定小波包变换能否对暂态电能质量信号进行有效的分析。以电压骤升、瞬态脉冲扰动信号为例,通过去噪来对暂态电能质量扰动信号进行小波包计算、分析和比较,结果表明:暂态电能质量扰动起止时刻是描述扰动的重要属性,并且证明了小波包变换是分析暂态电能质量信号的一种有效的方法。Transient power quality problem becomes increasingly important in today＇s power quality problems. This paper aiming at transient power quality disturbance signals , through wavelet packet transform to conduct time location and noise elimination for the disturbance signals, and then compare data which are generated, ensure that if wavelet packet transform could effectively analyze transient power quality signals. Taking examples of voltage sag and transient pulse disturbance signal, through noise elimination to do wavelet packet analysis. Conduct calculating, analyzing and comparing, the results showed that the start and end time of transient power quality is a important attribute of describing disturbance, and proved that wavelet packet transform is a effective method of analyzing transient power quality signals.

关 键 词：小波包变换 暂态电能质量 电压骤升 

分 类 号：TM743[电气工程—电力系统及自动化]