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The static compensators are capable of improving the power quality indices in the power systems. Since the electric arc furnace (EAF) acts as a non-linear time-variant load, it deteriorates the power quality. Thus, with a suitable design of the static compensators the consumed power by the electric furnace can be controlled. In this regard, firstly, a power system with an electric furnace is simulated. In the next step, in order to improve the power quality indices, a thyristor switched capacitor (TSC) VAr compensator is designed optimally and then simulated. The TSC static compensator is designed so that the great variations of the furnace reactive power can be measured accurately. In addition, the designed static compensator creates a reduction in the voltage and current transients at the thyristor terminals as well as generating the suitable pulses for them. Also, a suitable harmonic filter is proposed to improve the performance of the power system.
Date of Conference: 6-9 Sept. 2008