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

Content Provider	IET Digital Library
Author	Su, Taixin Yang, Mingfa Jin, Tao Flesch, Rodolfo César Costa
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.
Starting Page	953
Ending Page	961
Page Count	9
ISSN	17521416
Volume Number	12
e-ISSN	17521424
Issue Number	Issue 8, Jun (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/12/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2017.0115
Journal	IET Renewable Power Generation
Publisher Date	2018-04-05
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	All-phase Spectrum Analysis Discrete Fourier Transform Fast Fourier Transform Fast Fourier Transform Algorithm Fence Effect Harmonic Analysis Harmonics Integral Transforms Interharmonic Identification Measurement Precision Nonsynchronous Sampling Nuttall Double-window All-phase FFT Algorithm Phase Invariance Characteristic Phase Measurement Power Grid Power Harmonic Detection Method Power Interharmonic Detection Method Power Supply Quality Power System Power System Harmonics Renewable Power Signal Processing And Detection Signal Sampling Spectral Analysis Spectral Leakage Suppression Spectrum Correction Method Window Function
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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