Analysis of the Currents Physical Components Along a Complete Heat Process in a Real Electric Arc Furnace

Abstract

Modern Electric Arc Furnace (EAF) facilities have a consumption of power compared to a mid-size city. Electrical short circuit is the operative base in an EAF making that voltage and current signals present an extreme distortion. This paper presents the analysis of a Power Profile in a real 100 MVA AC EAF installation by the successfully implementation of Current Physical Components (CPC) Power Theory. Despite of distortion conditions, an average difference between CPC Apparent Power and RMS Apparent Power of 2% in Bore-Down stage and of 0.6% in Refining is gotten in implementation. The effect of non-sinusoidal voltage and current in EAF conductance, the unbalance produced by the changing impedance of electrodes and the amount of the reflected harmonics to the source because of HGL features in EAF are described and quantified by Scattering Current, Unbalance Current and Generated Current respectively. The RMS value and the order of the most significant harmonics of each one of the CPC currents give us real information to compensate the Non-Active Power produced by these currents, which ranges from 23 MVA in Bore-Down to 13 MVA in Refining.