Design and Simulation of a UPQC Based on a Phase-Locked Loop Controller with Nonlinear Loads

<p><em><span>The project implements unified power quality conditioner (UPQC) power quality improvement devices for addressing the voltage and current quality issues of sensitive loads. The UPQC contains series and shunt converters that operate through a standard dc junction. The shunt converters cleanse the nonlinear load side of current harmonics and the series converters do the same for supply-side voltage sag. </span></em></p> <p><em><span>The researched technique of generating reference signals (phase-locked loop) provides a basis for developing controllers for series converters and shunt converters. The fuzzy-logic controllers form the basis for controlling the dc link operation. The new sag indication method outperforms the dq-transformed conventional approach. The control system includes a rapid detector for sags. MATLAB/SIMULINK serves as the platform to conduct simulated tests which validate the effectiveness of this proposed system.</span></em></p>