A Space-Vector Discrete Fourier Transform for Unbalanced and Distorted Three-Phase Signals

被引:65
作者
Neves, Francisco A. S. [1 ]
de Souza, Helber E. P. [1 ,3 ]
Bradaschia, Fabricio [1 ]
Cavalcanti, Marcelo C. [1 ]
Rizo, Mario [2 ]
Rodriguez, Francisco J. [2 ]
机构
[1] Univ Fed Pernambuco, Dept Elect Engn, BR-50730540 Recife, PE, Brazil
[2] Univ Alcala, Dept Elect, Alcala De Henares 28805, Spain
[3] Fed Inst Educ Sci & Technol Pernambuco, Dept Ind, BR-55200200 Pesqueira, Brazil
关键词
Active filters; amplitude and phase estimation; discrete Fourier transforms (DFTs); industrial power system harmonics; ACTIVE POWER FILTER; STEADY-STATE; SYNCHRONIZATION; CONVERTERS; IMPLEMENTATION; SYSTEM;
D O I
10.1109/TIE.2009.2036646
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, a space-vector discrete-time Fourier transform is proposed for fast and precise detection of the fundamental-frequency and harmonic positive-and negative-sequence vector components of three-phase input signals. The discrete Fourier transform is applied to the three-phase signals represented by Clarke's alpha beta vector. It is shown that the complex numbers output from the Fourier transform are the instantaneous values of the positive-and negative-sequence harmonic component vectors of the input three-phase signals. The method allows the computation of any desired positive-or negative-sequence fundamental-frequency or harmonic vector component of the input signal. A recursive algorithm for low-effort online implementation is also presented. The detection performance for variable-frequency and interharmonic input signals is discussed. The proposed and other usual method performances are compared through simulations and experiments.
引用
收藏
页码:2858 / 2867
页数:10
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