New extraction method for active, reactive and individual harmonic components from distorted current signal

Hasan Dirik; Muammer Özdemir

New extraction method for active, reactive and individual harmonic components from distorted current signal

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Author(s): Hasan Dirik ¹ and Muammer Özdemir ²
- Affiliations: 1: Vocational School, Sinop University, Sinop 57000, Turkey;
  2: Faculty of Engineering, Ondokuzmayis University, Samsun 55139, Turkey
Source: Volume 8, Issue 11, November 2014, p. 1767 – 1777
DOI: 10.1049/iet-gtd.2013.0500 , Print ISSN 1751-8687, Online ISSN 1751-8695

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Received 23/07/2013, Accepted 17/03/2014, Revised 10/03/2014, Published 06/05/2014

Quality problems encountered in power systems usually originate from reactive and harmonic current components drawn by non-linear loads. Therefore the extraction of reactive and harmonic current components from distorted current waveform is a vital issue in the works aiming to monitor and eliminate power quality problems. In this study, a new method that provides the extraction of active, reactive and harmonic current components from distorted current is presented. The method has been based on the differential equation of the single-phase source-load system. The proposed method performs computations by using a sliding sampling window that has a width of half of the fundamental cycle. Immunity to noise, being less affected from frequency deviations and being not influenced from dc component that may exist in load currents are some other advantages of the proposed method. The method has been analysed and compared to two commonly used methods, namely discrete Fourier transform (DFT) and dq, by using a series of simulations that have been executed in Matlab/Simulink environment. Simulation results demonstrated the effectiveness of the proposed method.

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New extraction method for active, reactive and individual harmonic components from distorted current signal

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