Model for the Power Quality (PQ) Mitigation of Voltage Sag using a Dynamic Voltage Restorer (DVR)

Abstract

Voltage sag is a significant power quality disturbance that can lead to operational disruptions, equipment damage, and financial losses in industrial and commercial sectors. Dynamic Voltage Restorer (DVR) is an effective custom power device designed to mitigate voltage sags and ensure uninterrupted power supply. This research focuses on modeling a DVR-based compensation system to analyze its performance in mitigating voltage sags under various fault conditions. A comprehensive mathematical model is developed, and simulations are conducted using MATLAB/Simulink to evaluate the DVR’s response in restoring voltage levels. The results demonstrate that the DVR effectively compensates for voltage sags with minimal response time and improved voltage stability. The study highlights the DVR’s potential as a cost-effective and efficient solution for enhancing power quality in modern power distribution systems.