A new method for power signal harmonic analysis

Author

Yang, Jun-Zhe ; Yu, Chi-Shan ; Liu, Chih-Wen

Author_Institution

Dept. of Electr. Eng., I-Shou Univ., Kaoshiung, Taiwan

Volume

20

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

1235

Lastpage

1239

Abstract

With the increasing use of nonlinear loads in power systems, the harmonic pollution becomes more and more serious. It is well known that fast Fourier transform (FFT) is a powerful tool for power signal harmonic analysis, but leakage effect, picket fence effect, and aliasing effect make FFT suffer from specific restrictions. In this paper, we proposed a new method for power signal harmonic analysis. The major components of this method are a frequency and phasor estimating algorithm, a finite-impulse-response comb filter, and a correction factor. We also combine other methods to enhance our performance, such as discrete Fourier transform and least square error (LSE) method. To verify this method, we provided the comparisons of this method with FFT.

Keywords

FIR filters; comb filters; fast Fourier transforms; frequency estimation; harmonic analysis; least squares approximations; phase estimation; power system harmonics; correction factor; discrete Fourier transform; fast Fourier transform; finite-impulse-response comb filter; frequency estimating algorithm; least square error method; nonlinear loads; phasor estimating algorithm; power signal harmonic analysis; power system harmonic analysis; Equations; Fast Fourier transforms; Finite impulse response filter; Frequency estimation; Harmonic analysis; Pollution; Power harmonic filters; Power system analysis computing; Power system harmonics; Power system relaying; Fast Fourier transform (FFT); finite-impulse-response (FIR) comb filter; harmonic analysis;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2004.834311

Filename

1413385