DESIGN AND SIMULATION OF SERIES ACTIVE POWER FILTER FOR POWER QUALITY IMPROVEMENT

Abstract

This dissertation delineates a comparative investigation into the enhancement of electrical power quality through the deployment of a Series Active Power Filter (SAPF) employing diverse Pulse Width Modulation (PWM) control methodologies within a MATLAB/Simulink framework. The inquiry examines system behaviour in the absence of SAPF, in conjunction with SAPF utilising Discrete PWM, and with SAPF governed by Hysteresis PWM strategies. The principal aim resides in the attenuation of Total Harmonic Distortion (THD) in the load voltage and the amelioration of voltage integrity at the Point of Common Coupling (PCC). Simulated results evince that the system devoid of SAPF manifests substantial harmonic perturbations, whereas the application of SAPF with Discrete PWM diminishes THD to 1.68%. Employing Hysteresis PWM further accomplishes superior harmonic suppression, reducing THD to a mere 0.35% and producing near-sinusoidal voltage. The study corroborates that Hysteresis PWM-controlled SAPF affords accelerated dynamic response, enhanced harmonic compensation, and improved voltage regulation, thereby substantiating its efficacy in refining distribution system power quality.