New time domain electric arc furnace model for power quality study

Power quality is becoming a more concern of today´s power system engineer due to rapid growth of non-linear loads in distribution network. Electric arc furnace (EAF) is one of the typical industrial non-linear loads responsible for deteriorating the power quality in the distribution network by-introducing harmonics, propagating voltage flicker and causing unbalance-in voltages and currents. Hence electric arc furnace model is needed to study and to analyze the power quality in the distribution network. This paper presents a new time domain model of electric arc furnace to study power quality problems. The proposed model is a combination of two previous EAF models called-Exponential and hyperbolic model-using transition functions. The functioning of the proposed model has been validated by comparing its performance characteristics with the existing Cassie-Mayr EAF model. Simulation carried out in SIMULINK/MATLAB environment.