Implementation of Unified Power Quality Conditioner Based on Variable Phase Angle Control Method

Abstract

This paper investigates the power quality problems which occur frequently in power supply and suggests a method to mitigate the power quality problems by the implementation of UPQC. P-Q problems generally concern with voltage sags/swells and harmonic currents. Custom Power (CP) devices that mitigate these power quality problems have gained more attention in the recent decades. UPQC is Designed, modelled and setup experimentally to mitigate voltage sag/swells and harmonic currents in three phase systems. UPQC consists of Dynamic Voltage Restorer (DVR) and Active Power Filter (APF). UPQC with proposed controller algorithms effectively compensates the sag/swell in supply voltage by keeping the load voltage amplitude at 0.9-1 per unit and eliminates the load current harmonics by keeping supply current at 5% less than of Total Harmonic Distortion,simultaneously.

Keywords: Custom power device,Voltage sag,swell,Harmonics.

DOI: 10.7176/ISDE/12-3-03

Publication date:September 30^th 2021