Improving Power Quality by Shunt Active Filter with PID control Strategy

Abstract

In this paper Shunt Active Filters (SAF) is used to supply the required compensating source current which is one of the power quality issue. DC bus of Voltage Source Inverter (VSI) is controlled by PI and PID control techniques. Synchronous Reference Frame Theory (SRFT )is the control algorithm implementation of SAF. SAF is realized using 3-phase, 3leg Voltage Source Inverter (VSI). The results obtained from PI model and PID model are compared with respect to Total Harmonic Distortion (THD). THD is compared without and with compensation. All the simulation are carried out in Matlab simulink environment and result discussion is providing based on the optimum method for controlling DC bus of VSI.