POWER QUALITY ENHANCEMENT IN DISTRIBUTION SYSTEMS USING CUSTOM POWER DEVICES

Abstract

Power quality issues such as voltage sag, swell, flicker, and harmonics significantly affect sensitive electronic devices and industrial equipment. Custom Power Devices (CPDs), including Dynamic Voltage Restorers (DVRs), Distribution Static Compensators (DSTATCOMs), and Unified Power Quality Conditioners (UPQCs), are designed to mitigate these disturbances. This study presents a comprehensive analysis of CPDs integrated into distribution systems to enhance voltage stability and minimize total harmonic distortion. MATLAB/Simulink simulations are conducted under varying load conditions to evaluate performance metrics such as voltage profile, reactive power compensation, and harmonic mitigation. Results indicate that CPDs can restore voltage sag in milliseconds, reduce harmonic content below IEEE limits, and improve overall system reliability. The study highlights the effectiveness of coordinated CPD deployment and control strategies for modern smart grids. Implementation of these devices provides a robust solution for industrial, commercial, and residential systems requiring high-quality power. Economic considerations, efficiency, and rapid dynamic response are also analyzed. The findings confirm that CPDs are vital for enhancing power quality and maintaining uninterrupted operation of sensitive loads.