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[期刊论文]

Power harmonic and interharmonic detection method in renewable power based on Nuttall double-window all-phase FFT algorithm

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author:

Su, Taixin (Su, Taixin.) [1] | Yang, Mingfa (Yang, Mingfa.) [2] (Scholars:杨明发) | Jin, Tao (Jin, Tao.) [3] (Scholars:金涛) | Unfold

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EI Scopus SCIE

Abstract:

Harmonics and interharmonics adversely affect power grids. The fast Fourier transform (FFT) algorithm is one of the most commonly used methods for harmonic analysis. However, in practical applications, the accuracy of harmonic analysis can be seriously affected by fence effect and spectral leakage, which are undesired characteristics inherent to discrete Fourier transforms. Moreover, when non-synchronous sampling is carried out, the phase measurement is not accurate enough, and there is a large error in the identification of interharmonics. In order to improve the measurement precision, the method of all-phase spectrum analysis is used, since it has the characteristics of phase invariance and good spectral leakage suppression. A novel method based on improved Nuttall double-window all-phase FFT is proposed by improving the window function and the spectrum correction method for achieving higher precision. Through simulation and experimental verification, the proposed algorithm has proven to perform better than the traditional algorithms both for the detection of harmonics and interharmonics. In addition, the computation burden is not considerably increased when compared to such algorithms, which allows the on-line use of the proposed algorithm.

Keyword:

all-phase spectrum analysis discrete Fourier transforms fast Fourier transform algorithm fast Fourier transforms fence effect harmonic analysis interharmonic identification measurement precision nonsynchronous sampling Nuttall double-window all-phase FFT algorithm phase invariance characteristics phase measurement power grids power harmonic detection method power interharmonic detection method power system harmonics renewable power signal sampling spectral analysis spectral leakage suppression spectrum correction method window function

Community:

  • [ 1 ] [Su, Taixin]Fuzhou Univ, Dept Elect Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Yang, Mingfa]Fuzhou Univ, Dept Elect Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Jin, Tao]Fuzhou Univ, Dept Elect Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Costa Flesch, Rodolfo Cesar]Univ Fed Santa Catarina, Dept Automat & Syst, BR-88040900 Florianopolis, SC, Brazil

Reprint 's Address:

  • 金涛

    [Jin, Tao]Fuzhou Univ, Dept Elect Engn, Fuzhou 350116, Fujian, Peoples R China

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Related Article:

Source :

IET RENEWABLE POWER GENERATION

ISSN: 1752-1416

Year: 2018

Issue: 8

Volume: 12

Page: 953-961

3 . 6 0 5

JCR@2018

2 . 6 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:170

JCR Journal Grade:1

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 48

30 Days PV: 1

Online/Total:382/10287630
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