| 一种改进型FFT谐波分析方法 |
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| 引用本文： | 荣海舟,粟时平,逯培兵,郑龙.一种改进型FFT谐波分析方法[J].电力系统及其自动化学报,2009,21(1). |
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| 作者姓名： | 荣海舟 粟时平 逯培兵 郑龙 |
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| 作者单位： | 长沙理工大学电气与信息工程学院,长沙,410076 |
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| 摘 要： | 快速傅里叶变换(fast Fourier transform,FFT)存在较大的误差,不适宜直接用于电力系统谐波分析中.为消除其所产生的误差,提高检测精度,提出了一种基于最小二乘法与FFT相结合的改进型谐波分析方法.该方法利用最小二乘法对快速傅里叶变换的结果进行修正,从而获得高准确度的分析结果,实现对非整数谐波和频率较小的次谐波的同步跟踪与分析.利用Matlab软件对该方法进行仿真实验,仿真结果证明了该方法的有效性和准确性,为谐波的检测与分析提供了一种有效的方法.
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| 关 键 词： | 谐波分析 快速傅里叶变换 最小二乘法 参数修正 仿真 |
Improved FFT Method for Harmonic Analysis Base on Least Square Method |
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| RONG Hai-zhou,SU Shi-ping,LU Pei-bing,ZHENG Long.Improved FFT Method for Harmonic Analysis Base on Least Square Method[J].Proceedings of the CSU-EPSA,2009,21(1). |
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| Authors: | RONG Hai-zhou SU Shi-ping LU Pei-bing ZHENG Long |
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| Affiliation: | College of Electrical and Information Engineering;Changsha Universityof Science and Technology;Changsha 410076;China |
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| Abstract: | Fast Fourier transform(FFT) has a higher error in the harmonic analysis of the electric power system.In order to reduce the errors and improve the measurement precision,improved FFT algorithm for harmonic analysis based on least square method is presented.It makes use of least square to amend the result of FFT.Thus,effective results of harmonic analysis are obtained and synchronous tracking of non-integer harmonics and lower frequency harmonics are realized.Simulation results show that the proposed method i... |
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| Keywords: | harmonic analysis fast Fourier transform(FFT) least square parametric modification simulation |
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