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2005, 18

S. A. Soliman

Power systems harmonics and inter-harmonics identification: a power quality issue

language: English

received 24.04.2005, published 14.06.2005

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The discrete Hartley transform (DHT) is a real-valued transform and is closely related to the familiar Fourier transform (FT). This paper presents the application of DHT for power system harmonics and inter-harmonics identification and measurements. Unlike the DFT, DHT can identify these harmonics without any restriction on the frequency of the harmonic to be identified. Also DHT can easily identify the harmonics and interharmonics directly without any mathematical models for any one of them. The proposed algorithm uses directly the samples of the voltage or current waveform at the location where the power quality criteria are to meet. In this paper, the convolution property of the DHT is used in the identification and measurement process. Because the Hartley transform is a real transform, it is more computationally efficient than the Fourier and Laplace transforms. Different examples are presented. Effects of critical parameters on the performance of the proposed algorithm are discussed.

Keywords: Hartley transform identification of harmonic and interharmonic, power quality analysis

8 pages, 0 figures

Сitation: S. A. Soliman. Power systems harmonics and inter-harmonics identification:. Electronic Journal “Technical Acoustics”,, 2005, 18.


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S. A. Soliman (Ph.D) received his B.Sc and M.Sc in 1973 and 1977 respectively from Ain Shams University, Faculty of Engineering, Egypt (all in electric power and machines) and Ph. D in 1986 in Electrical Engineering from the University of Alberta, Edmonton, Alberta, Canada. He is now a professor and head of Electrical Engineering Department, University of Qatar, Doha, Qatar. Prof. Soliman authored and coauthored three books in the subject, published by Plenum Press. Furthermore, he authored and coauthored more than 110 referred journal paper, and more than 50 referred conference papers. His research interest is in the area of power system, power quality, power system planning, and application of state estimation to power system as well as fuzzy systems applications.

e-mail: solimans(at)