Journal ArticleDOI
Desynchronized Processing technique for Harmonic and interharmonic analysis
TLDR
A new desynchronized processing technique for harmonic and interharmonic analysis that has general validity and results fully compatible with the IEC standard is presented and is as accurate as those of synchronized techniques.Abstract:
A new desynchronized processing technique for harmonic and interharmonic analysis that has general validity and results fully compatible with the IEC standard is presented This technique is based on a double-stage signal processing procedure: In the first stage, the harmonic components are accurately estimated via interpolations in frequency domain and filtered away from the original signal so that in the second stage, interharmonics can be evaluated without the spectral leakage due to harmonic tones Since the procedure does not require synchronization, it allows adopting a fixed sampling frequency and, at the same time, the direct use of fast Fourier transform on the acquired samples, thereby reducing the computational burden The procedure is successfully applied to both numerical tests and onfield measurements The obtained results are as accurate as those of synchronized techniquesread more
Citations
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Journal ArticleDOI
Interharmonics: Theory and Modeling
A. Testa,M.F. Akram,R. Burch,Guido Carpinelli,Gary W. Chang,Venkata Dinavahi,Constantine J. Hatziadoniu,W.M. Grady,E. Gunther,Mark Halpin,Peter W. Lehn,Y. Liu,Roberto Langella,M. Lowenstein,Aurelio Medina,T.H. Ortmeyer,Satish J. Ranade,Paulo F. Ribeiro,Neville R. Watson,J. Wikston,Wilsun Xu +20 more
TL;DR: In this paper, the most remarkable issues related to interharmonic theory and modeling are presented, starting from the basic definitions and concepts, attention is first devoted to inter-harmonic sources, and then the interharmonics assessment is considered with particular attention to the problem of the frequency resolution and of the computational burden associated with the analysis of periodic steady-state waveforms.
Journal ArticleDOI
Harmonics estimation in emerging power system: Key issues and challenges
TL;DR: In this article, several methods of power system harmonics estimation are critically reviewed and classified based on the type of analysis tool and applications and the key issues and challenges in harmonics estimations are highlighted.
Journal ArticleDOI
Estimating Interharmonics by Using Sliding-Window ESPRIT
Irene Yu-Hua Gu,Math Bollen +1 more
TL;DR: In this article, a sliding-window ESPRIT method is proposed for estimating inter-harmonic frequencies in power system voltage and current signals, which is based on a spectrum-estimation method known as ldquoestimation of signal parameters via rotational invariance techniques.
Journal ArticleDOI
Interharmonics Analysis Based on Interpolating Windowed FFT Algorithm
TL;DR: In this article, an interpolation fast Fourier transform (FFT) based method was proposed to estimate interharmonic parameters. But, the interharmonics cannot be obtained accurately by using FFT for an unsynchronized sample sequence analysis because of large errors in such cases.
Journal ArticleDOI
Extended Real Model of Kalman Filter for Time-Varying Harmonics Estimation
TL;DR: An extended real model of Kalman filter combined with a resetting mechanism for accurately tracking time-varying harmonic components of power signals is presented in this article, where the usefulness of the proposed algorithm is demonstrated by a simple laboratory setup with LabVIEW program and the dedicated hardware for harmonics monitoring.
References
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Journal ArticleDOI
On the use of windows for harmonic analysis with the discrete Fourier transform
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Journal ArticleDOI
High-Accuracy Analog Measurements via Interpolated FFT
TL;DR: In this article, interpolated fast Fourier transform (FFT) algorithms are used for multi-parameter measurements upon periodic signals, such as fundamental frequency, phase, and amplitude, with enhanced accuracy compared to existing algorithms.
Journal ArticleDOI
Interpolation techniques for real-time multifrequency waveform analysis
C. Offelli,Dario Petri +1 more
TL;DR: It is shown that some relationships used in interpolation are affected very little by the number of processed samples, so that only the characteristics of the analyzed signal and the required accuracy affect the choice of this parameter.
Proceedings ArticleDOI
On the processing of harmonics and interharmonics in electrical power systems
TL;DR: In this article, the authors analyzed the spectral leakage problems due to a nonsynchronization of the analyzed waveforms with the window width, deriving from both fundamental frequency deviations and nonsynchronized interharmonics.
Journal ArticleDOI
A Self-Tuning Harmonic and Interharmonic Processing Technique
TL;DR: In this paper, a self-tuning technique is proposed to perform the spectral analysis on a time window whose width is as near as possible to an integer number of the actual period of the fundamental component, so minimizing the effects of spectral leakage on interharmonic estimation.
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