Enhancement of Power Quality by Using MC-UPQC

D. Subba Rao, T. Srinivasa Rao

Abstract: This paper presents a power quality improvement by using multi converter unified power-quality conditioning system (MC-UPQC), it will provide the following multi functions: reactive power compensation, harmonic compensation, flicker/ imbalance compensation and voltage sag/swell in multi bus/multi feeder systems. With this topology the supply voltage fluctuations on both feeders and current fluctuations on main feeder is compensated. In this system the three VSCs are connected back to back with a common dc-link capacitor. Sag/swell and interruption are compensated by transferring the power from one feeder to another feeder.

Keywords: Power quality (PQ), Unified power quality conditioner (UPQC), MATLAB/SIMULINK, Voltage Source Converter (VSC), Voltage sag, Voltage swell