基于傅里叶算法的衰减直流分量消除的研究  

A Research on Eliminating Decaying DC Component Based on Fourier Algorithm

作　　者：叶汉民[1] 谭惠尹[1] 穆晓慧[1] 

机构地区：[1]桂林理工大学,广西桂林541004

出　　处：《电测与仪表》2011年第2期15-20,共6页Electrical Measurement & Instrumentation

摘　　要：针对消除衰减直流分量算法中,存在用时长和误差大的缺陷,提出一种在假定输入信号只含有基频分量、衰减直流分量和各整次谐波分量的情况下,对全波傅里叶算法进行改进。其基本原理是对衰减直流分量的正弦、余弦分量的系数进行补偿,消除衰减直流分量对全波傅里叶算法的影响。并用Matlab对算法进行仿真,从仿真结果可以看出,在不考虑非整次谐波分量的影响时,改进算法效果十分理想。According to the shortcomings of rough time consumingness and large errors of current decaying DC component algorithms, this paper introduces an improved full - wave Fourier algorithm on condition that the input signals only contain the fundamental frequency component, decaying DC component and integer harmonic components. Its principle is to compensate for the coefficients of the decaying sine component and cosine component, successfully eliminating the impact of the decaying DC component on the full - wave Fourier algorithm. Also, a simulation of this newly - brought algorithm has been done by Matlab, and the simulation results shows that the improved algorithm has achieved very good results under circumstances without considering the impact of non - integer harmonic wave component.

关 键 词：全波傅里叶算法 衰减直流分量 MATLAB 

分 类 号：TM77[电气工程—电力系统及自动化]