Modeling of Electric Arc Furnace & control algorithms for voltage flicker mitigation using DSTATCOM

Voltage flicker, a phenomenon of annoying light intensity fluctuation is caused by electric arc furnace (EAF). Voltage flicker is a major power quality concern for both power companies and customers. This paper presents a model of EAF and control algorithms for distribution static synchronous compensator (DSTATCOM) for voltage flicker mitigation. The EAF was modeled as a current source controlled by a non linear resistance. Two control algorithms were developed. One of the methods is based on instantaneous reactive power p-q theory and the other method is based on synchronous reference frame d-q theory. Both the control schemes are simulated using MATLAB/SIMULINK along with the SimPowerSystem Block set. In both the controllers compensating reactive currents are generated which help in the mitigation of voltage flicker.