电力系统奇异信号的复值小波分析

文章讨论了小正的正交性，紧支性，对称性以及平滑性的作用，分析了框架意义下的冗余小波变的特点，以及小波框架和尺度参数离散化的要点，在此基础上提出了利用复值小波变换的相位信息辅助幅值信息进行电力系统故障奇异信息检测的方法。

COMPLEX WAVELET ANALYSIS FOR SINGULAR SIGNALS OF POWER SYSTEMS

The functions of orthogonality,compactibility symmetry and smoothness of the wavelet are discussed in this paper.The characteristics of redundant wavelet transform under "Frame",wavelet frame and discretization of scales are analyzed simultaneously.A new method to detect singular signals of power systems using arguments and magnitudes of complex wavelet transform is presented in thes paper.Then the analyzing results of some signals using Morlet complex wavelet shows that arguments of complex wavelet transform are more sensitive to singularity,and sudden changing information can be obtained at certain scale,and it is important that the selection of wavelet and scales corresponding to the analyzing signals.