New Strategy of DC Electrical Arc Furnace Converter for Mitigation of Voltage Fluctuations and Comparative Flicker Voltage in AC and DC Furnaces

A novel method to mitigate voltage flicker problem usually caused by DC Arc Furnaces has been presented in this paper. This method called Direct Current Ripple Re-injection is applied to a multi-step switching reactor in the output of the AC/DC converter to make the output load current as smoother as possible. This method would lessen harmonic effects properly. The proposed approach is simulated by MATLAB-SIMULINK software. Simulation are performed using dynamic arc model in which the performance of AC and DC electric Furnaces are evaluated with respect to generation of voltage flicker on power common coupling (PCC) busbar. Voltage flicker level is measured by means of a standard pseudo flickermeter whose components and block diagrams are illustrated in this paper.