Analysis of interharmonics in DC arc furnace installations

Author

Mattavelli, P. ; Felin, L. ; Bordignon, P. ; Perna, M.

Author_Institution

Dept. of Electr. Eng., Padova Univ., Italy

Volume

2

fYear

1998

fDate

14-18 Oct 1998

Firstpage

1092

Abstract

This paper deals with interharmonic disturbances encountered during the operation of a DC arc furnace installation. The main cause of the flicker-like disturbances has been identified in a strong harmonic interaction between AC and DC sides of the thyristor converters. In order to analyze the effects of the various system parameters, the frequency response of the entire system has been derived. This approach allows the analysis of the harmonic amplification taking into account the line impedance, resonances introduced by harmonic filters, current regulator parameters, and the synchronizing procedure. Based on this analysis suitable provisions have been taken to mitigate the 125 Hz voltage distortion on a 50 Hz system. The frequency domain analysis has been verified by a time domain EMTP model of the system. Finally, measurements has been taken on the DC arc furnace installation using different control and filter parameters, which show the effectiveness of the adopted provisions

Keywords

arc furnaces; frequency response; frequency-domain analysis; harmonic distortion; power harmonic filters; power system harmonics; power system measurement; thyristor convertors; 125 Hz; 50 Hz; DC arc furnace installations; current regulator parameters; flicker-like disturbances; frequency domain analysis; frequency response; harmonic amplification; harmonic filter resonance; harmonic interaction; interharmonics analysis; line impedance; thyristor converters; time domain EMTP model; Analog-digital conversion; Frequency response; Furnaces; Harmonic analysis; Harmonic filters; Impedance; Power harmonic filters; Regulators; Resonance; Thyristors;

fLanguage

English

Publisher

ieee

Conference_Titel

Harmonics and Quality of Power Proceedings, 1998. Proceedings. 8th International Conference On

Conference_Location

Athens

Print_ISBN

0-7803-5105-3

Type

conf

DOI

10.1109/ICHQP.1998.760191

Filename

760191