Modeling and Simulation of a Pi Controlled Shunt Active Power Filter for Power Quality Improvement Based on P-Q Theory

Abstract

A Reliable line filter design to mitigate current and voltage harmonics to meet utility power quality requirements is a key requirement for today's power systems. This article presents a detailed approach to designing shunt active power filters (SAPFs) to improve power quality. A proportional-integral controller (PI) is used to regulate the intermediate circuit voltage. Use instantaneous reactive power theory to get the reference current. Obtain a gate pulse to control a voltage source inverter (VSI) switch using hysteretic current control. Detailed SAPFs are developed and simulated for symmetric and asymmetric nonlinear loads using MATLAB/Simulink. Simulation results show that the proposed filter can minimize harmonic distortion to a level lower than that adopted by the Institute of Electrical and Electronics Engineers (IEEE) standards.