NDLI: A hybrid digital algorithm for harmonic and flicker measurements

Content Provider	IEEE Xplore Digital Library
Author	Ming-Tang Chen Sakis Metiopoulos, A.P.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng., Nat. Kaohsiung Univ. of Appl. Sci., Taiwan (Ming-Tang Chen)
Abstract	The voltage and current waveforms in an electric power circuit are usually harmonic-distorted and flicker-modulated due to the intermittent operation of nonlinear devices with large capacity. Digital algorithms based on fast-Fourier-transform (FFT) have been widely used for harmonic and flicker measurements. Since the requirements of frequency resolution and range are very different for harmonic and flicker measurements respectively, these measurements are always performed separately. Continuous wavelet transform (CWT) based algorithms were respectively applied to accurate harmonic, inter-harmonic, and flicker analysis, but a common disadvantage of these algorithms is the heavy computational burden. To facilitate the feasibility and practicality of the application, this paper proposes an FFT and CWT hybrid algorithm that can simultaneously accomplish the measurements of harmonic, inter-harmonic and flicker. The performance of the proposed algorithm is validated by the measurement simulations of synthesized signals, and the feasibility is approved by the measurement test of a recorded field signal on an electric arc furnace feeder. The results illustrate that the calculation time of the proposed algorithm can be largely reduced, while the accuracy is still acceptable.
Starting Page	1488
Ending Page	1493
File Size	131027
Page Count	6
File Format	PDF
ISBN	0780373227
DOI	10.1109/PESW.2002.985271
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-01-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Continuous wavelet transforms Voltage fluctuations Frequency measurement Electric variables measurement Circuits Performance evaluation Wavelet analysis Wavelet transforms Harmonic analysis Algorithm design and analysis
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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