JCIR_V1_N2_RP1 Bolisetti Naveen Mothi Ram Bhukya Journal on Circuits And Systems 2322–035X 1 2 1 6 Fuzzy Logic Controller, Power Quality, Active Power Filter(APF), Renewable Energy Resource(RES) This paper suggests a new control strategy that consists of a grid interfaced four leg inverter control system using adaptive fuzzy controller for a 3-phase 4-wire distribution system that is capable of simultaneously compensating problems like power factor, current imbalance and current harmonics, and also of injecting the energy generated by Renewable Energy Sources (RES). The grid interfacing can thus be utilized as:1)power converter to inject power generated from rest the grid, and 2)shunt APF to current unbalance, load current harmonics and load reactive power demand. All of these functions may be accomplished either individually or simultaneously. This new control concept is demonstrated with extensive MATLAB/simulink simulation studies. March - May 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2288