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Published Article / RZ I07/05/I-026 ENY-ARTICLE-2008-011

Evaluation of compensation devices of DC arc furnaces using advanced spectrum estimation methods

Bracale, A (Università degli Studi di Napoli “Federico II”, Napoli – Italy) ; Carpinelli, G (Università degli Studi di Napoli “Federico II”, Napoli – Italy) ; Lobos, T (Wroclaw University of Technology, Wroclaw – Poland) ; Leonowicz, Z (Wroclaw University of Technology, Wroclaw – Poland) ; Rezmer, J (Wroclaw University of Technology, Wroclaw – Poland)


Abstract: Spectral representation of waveform distor-tions has been of great interest in power systems for many years since the disturbing loads generate a wide spectrum of components which deteriorate the quality of power supply. When spectral components are time-varying in amplitude and/or in frequency – such as in presence of arc furnaces and adjustable speed drives - high resolution methods should be applied due to their capability of cap-ture these changes in time. In this paper the Prony and ESPRIT high-resolution methods are used to analyse simulated non-stationary waveforms in a supply system of a DC arc furnace. The analysis has been completed before and after the inclusion in the system of several compensa-tion devices (STATCOM, Active Filter, Passive Filter and a hybrid of STATCOM and Active Filter). The main con-clusion of the paper is that Prony and ESPRIT methods are useful tools also for the control system design; in fact, they allow capturing time variations of spectra compo-nents better than most usual techniques such as Fourier-based methods.

Keyword(s): DC Arc Furnaces ; STATCOM ; Active Filters ; Non-stationary Signal Analysis ; Prony Method ; ESPRIT
Note: 15th Power Systems Computation Conference. PSCC. Proceedings. Liege, 22-26 August 2005, 7 p.

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Record created 2008-03-06, last modified 2008-03-09

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