短时电压变动的小波变换模极大值奇异性检测方法  

Detecting of short duration voltage variation based on module maxima and singularity of wavelet transform

作　　者：刘桂英[1] 刘承员 粟渊恺[1] 

机构地区：[1]长沙理工大学电气与信息工程学院 [2]惠州市新科创工程建设监理有限公司

出　　处：《长沙理工大学学报（自然科学版）》2009年第2期44-50,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省教育厅科研资助项目(08hnjy043)

摘　　要：针对短时电压变动的特征,探讨了基于小波变换的模极大值奇异性的短时电压变动实时检测方法及其实现过程,并利用MATLAB对线路发生短时电压变动进行了仿真.仿真结果表明,利用小波变换模极大值奇异性法,可以实时、精确、有效检测短时电压变动信号发生时间、结束时间和幅值及瞬时值.Considering the characteristics based on module maxima and singularity of short duration voltage variations, a method of wavelet transform is proposed to detect the short duration voltage variation in real time on account of its outstanding time frequency localization characteristics. The implement processes of real-time detecting of the short duration Voltage variation based on module maxima and singularity of wavelet transform are introduced and some simulations of real-time detecting of short duration voltage variations happening at power lines is given with MATLAB. Simulative results indicates that the proposed method can be used to detect happen times, magnitude values and instantaneous values of short duration voltage variation real-timely, accurately and effectively.

关 键 词：短时电压变动 小波变换 模极大值 奇异性 检测 

分 类 号：TM711[电气工程—电力系统及自动化]