摘要
采用小波多分辨分析提取电压闪变信号,并根据小波函数的特点选用Daubechies小波对信号进行多层分解和重构,获取闪变信号的频率、幅值,根据小波变换模极大值原理,确定闪变发生和消失时间。MATLAB仿真结果表明,利用小波多分辨率分析可以有效地提取闪变信号。小波多分辨率分析用在闪变信号分析中可以取得良好的效果。
Voltage flicker signal is extracted by means of wavelet multi-resolution analysis, and based on the characteristics of the wavelet function, Danbechies wavelets are selected to process signal decomposition and reconstruction in order to acquire the flicker frequency and amplitude. Then based on principle of wavelet transform modulus maxima, the flicker occurrence and disappearance time can be determined. MATLAB simulation results show that wavelet multi-resolution analysis can be applied to extract the flicker signal effectively and achieve good results in the flicker analysis.
出处
《华东电力》
北大核心
2011年第10期1643-1646,共4页
East China Electric Power
基金
国家高技术研究发展计划资助项目(2007AA04Z100)~~
