JEE_V6_N2_RP5 Sakshi Bangia Dr. P.R. Sharma Maneesha Garg Journal on Electrical Engineering 2230 – 7176 6 2 29 35 Power Quality, Shunt Active Filter, Sliding Mode Control, Synchronous Reference Frame, THD Reduction The paper deals with the comparison of the performance and dynamic characteristics of a three-phase three-wired active power filter using Sliding Mode Control (SMC) and Synchronous Reference Frame (SRF) control strategy for power quality improvement. Sliding mode control implements discontinuous feedback control laws to strengthen the system state to reach, and consequently to remain on, a specified surface within the state space called as sliding surface In SRF control strategy for three-phase systems, reference frame transformation from stationary a-b-c frame to synchronous rotating d-q reference frame can change ac quantities in synchronous frequency into dc quantities which can be controlled by a PI controller. The objective is to enhance phase current waveform, THD reduction and reactive power compensation in electric power distribution system. Shunt Active Filter can efficiently introduce the current into the distribution by the power electronics based control. Thus MATLAB simulated results demonstrate that Shunt Active Filter can be considered as a viable solution for THD Reduction of supply current and reactive power compensation. October - December 2012 Copyright © 2012 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/ArticleHTML.aspx?articleID=2057