Control Methods and Active Filter Topologies Applied for Flicker Mitigation

Authors:	Doležal Jaroslav, Czech Technical University, Czech Republic Tlustý Josef, Czech Technical University, Czech Republic Valouch Viktor, Czech Academy of Science, Czech Republic
Topic:	6.3 Power Plants and Power Systems
Session:	Electric Distribution Systems
Keywords:	electrical arc furnace; flicker; linearised model; unified power quality conditioner; parallel and series active filter

Abstract

A linearised model of the power system with the Electrical Arc Furnace (EAF) and the Unified Power Quality Conditioner (UPQC) has been used in the frequency domain for finding an optimum control strategy of the UPQC. The analysis indicates that the most effective may be such an application of the UPQC where the parallel Active Filter (AF) compensates the whole reactive power consumed by the EAF and delivers to the network a capacitive power to hold the voltage at the PCC constant, while the series AF compensates the fluctuating active power of the EAF.