A NEW TIME DOMAIN MODEL FOR ELECTRIC ARC FURNACE

Rahmatollah Hooshmand - Mahdi Banejad - M. Torabian Esfahani

   The electric arc furnace (EAF) behaves like a non-linear load that draws the attention of many researchers. At first in this paper, the important time domain models of EAF are investigated. Then, an optimal time domain model for EAF is proposed to describe the performance of the EAF for different operating situations. In this paper, after deriving a model for EAF, its effects on the power system are studied by means of the PSCAD software. Several characteristics for different operating conditions are then investigated to analyze the proposed method. In addition, for a time-variant and non-linear load which generates voltage flicker and unbalanced voltage, the EAF are modelled. In order to study the effect of voltage flicker on the systems with EAF, random and sinusoidal voltage flickers are considered. Also, in this paper, the effects of the transformer of EAF and common inductance of the flexible cables are investigated. Finally, results of the simulation show the validity of the proposed model of EAF model in this paper.

Keywords: electric arc furnace modelling, unbalanced voltage, flicker, electric arc

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