The algorithm of interpolating windowed FFT for harmonic analysis of electric power system

Author

Zhang, Fusheng ; Geng, Zhongxing ; Yuan, Wei

Author_Institution

Dept. of Electr. Power Eng., Xi´´an Jiaotong Univ., China

Volume

16

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

160

Lastpage

164

Abstract

The fast Fourier transform (FFT) cannot be directly used in the harmonic analysis of an electric power system because of its higher errors, especially the phase error. This paper discusses the leakage phenomenon of FFT and presents a new amending algorithm, poly-item cosine window interpolation, which is based on the interpolating algorithm proposed by V. Jain and T Grandke. This new algorithm improves the accuracy of the FFT, so it can be applied to the precision analysis for electrical harmonics. The simulation result shows that applying different windows has different effects on the accuracy, and the Blackman-Harris window has the highest accuracy

Keywords

fast Fourier transforms; harmonic analysis; interpolation; power system harmonics; Blackman-Harris window; FFT; electric power system; electrical harmonics; grid effect; harmonic analysis; interpolating windowed FFT; leakage phenomenon; phase error; poly-item cosine window interpolation; precision analysis; Algorithm design and analysis; Fast Fourier transforms; Fourier transforms; Frequency; Harmonic analysis; Interpolation; Pollution measurement; Power system harmonics; Power system simulation; Signal sampling;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.915476

Filename

915476