Optimal Fuzzy Controller ForPower Quality Improvement Of Dynamic Voltage Restorer Using Bacterial Foraging Algorithm

Abstract

This paper deals with various issues of power quality problems  such as Voltage sag & swell,, surges, harmonic etcusing Dynamic voltage Restorer (DVR).The conventional approach of PI tuning is inefficient due to the non-linearity  presentin the system.  In the proposed method most popularly used optimization technique namely Bacterial Foraging Optimization Algorithm is used to tune the PI controller betteroutput  performance. Thevalidation of the proposed technique forpower systems to minimize the major power quality indices such as voltage  sag and total harmonic Distortion(THD). These indices in sensitive loads at fault conditions has been simulated and tested. Therefore, the multi-objective optimization algorithm is considered in order to achieve  a better performance in solving the related problems.