基于小波模极大值的电压骤降定位检测  

Voltage Sag Locating Detection Based on Wavelet Modulus Maxim

作　　者：许童羽[1] 曹英丽[1] 陈春玲[1] 

机构地区：[1]沈阳农业大学信息与电气工程学院

出　　处：《沈阳农业大学学报》2010年第3期369-371,共3页Journal of Shenyang Agricultural University

基　　金：辽宁省教育厅高校科研A类项目(2008635)

摘　　要：电压骤降是一种典型的暂态电压扰动信号。分析了小波系数与Lipschitz指数的关系,将利用小波模极大值检测信号奇异性的方法应用到电压骤降信号的定位检测。仿真算例表明：该方法有效,能准确确定电压骤降的起止时刻,但在选择小波类型方面需要综合考虑其消失矩、正则性、支集长度。Voltage sag is a kind of transient voltage disturbance signal.The relation between wavelet coefficient and exponent was analyzed.The method which singularity of signal was detected based on wavelet modulus maxim was applied to detect voltage sag.One simulation example showed that the method was useful and the start and end time could be precisely detected.But the other showed that a comprehensive consideration should be given to vanishing moments,regulation and support length of wavelet in its selection.

关 键 词：电压骤降 小波模极大值 消失矩 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]