Power Quality Improvement using Modified DVR with integration of Coati Optimization Algorithm and Fuzzy Logic

Power quality is a pressing concern, particularly for power-sensitive devices impacted by supply irregularities, leading to equipment failure for end users. Voltage sags and swells are the predominant issues in medium and low voltage distribution grids, causing significant disruptions and financial losses. The Dynamic Voltage Restorer (DVR) is the most efficient solution, known for its affordability, compactness, and swift response to disturbances. This study focuses on DVR principles and techniques for restoring voltage during sag and swell events. Simulations demonstrate the DVR’s capabilities using pulse width modulation (PWM). Coati optimization coupled with fuzzy logic optimizes membership functions, achieving notable reductions in total harmonic distortion (THD) when compared to a PI controller.