PERFORMANCE INVESTIGATION OF HYBRID ACTIVE FILTER

Abstract

Industrial, domestic, commercial use of non linear power electronic devices leads to deteriorating quality of the power. Loads like ASD and diode rectifier draw harmonic and reactive power components of current from the Power system and hence reducing the efficiency of the Power system. The increasing use of these devices forced researchers to study the effects '4 of harmonics and solution of the problem due to poor power quality. Various types of filters are designed for the solution of the problem. These can be classified as passive and active filters. Passive filter are the devices for harmonic compensation consists of inductors and capacitors. But there are various disadvantages of using passive filters so active filters are designed. Active filters consist of power electronic device that generates the compensating current and help the source current to get into sinusoidal. But due to cost problem in the active filters, research has been started on the hybrid active filters. Hybrid active filters have excellent compensation characteristics and economically better than the active filters alone. The following work includes the studying the effects of harmonics in power quality and solutions required to rectify these problems. Various topologies of the hybrid active filters have been analyzed with three different control strategies. A comparative analysis of P1 and Fuzzy controller is also explained. The topologies are designed in the MATLAB/Simulink. The experimental setup is also created to study and compare their results with the simulation results.