标题:
一种间谐波检测方法的研究An Analytical Method of Inter-Harmonic Detection
作者:
李方果, 方凤才, 何益宏
关键字:
小波变换, 信号调制, 直流信号, 间谐波检测Wavelet Transform, Signal Modulation, DC Signal, Inter-Harmonic Detection
期刊名称:
《Computer Science and Application》, Vol.5 No.5, 2015-05-27
摘要:
在小波变换对间谐波检测的基础上，特定函数对采样信号调制后，改变信号的频率结构，利用基于MATLLAT算法的小波多分辨分析在低频段具有高频率分辨率特点，分离出信号调制后信号的直流分量用于计算间谐波分量。经过MATLAB仿真验证，该方法能够准确检测谐波和间谐波分量。A method of inter-harmonic detection is presented based on wavelet transform after the sampled signal modulated by specific function and the structure of the signal frequency have been changed. The methods based on MALLAT algorithm of wavelet multiresolution have a high frequency reso-lution in the low-frequency band. Then, the inter-harmonics component is calculated by the DC component which is separated out from modulated signal by the methods. The simulation results show that the method can accurately detect harmonics and inter-harmonics.