Modeling and Analysis of Power Quality Improvement Strategies Using Improved Dynamic Voltage Restorer

Modern power systems face increased power quality issues due to numerous non-linear loads, with voltage sags being particularly disruptive. Voltage sags, characterized by a temporary drop in voltage levels, can cause significant equipment malfunctions and economic losses. The Dynamic Voltage Restorer (DVR) has become a key solution for mitigating these sags. This research presents an advanced PI controller-based DVR, using numerical simulations and modeling to evaluate its performance under various conditions. Results from MATLAB/Simulink simulations, conducted in a three-phase power system environment, demonstrate the enhanced DVR's superior ability to compensate for voltage sags, thereby improving power quality significantly compared to conventional DVRs. The study meticulously assesses compensation time, sag magnitude, and load variations, highlighting the advanced system's effectiveness in power quality enhancement.