Performance Analysis and Review of Ant Colony Optimization Based Hybrid Active Power Filter for Three Phase Four Wire System

This paper explains the dynamic behaviour of ant colony optimization based Hybrid Active Power Filter (HAPF) accomplished for harmonic compensation under varying source/load conditions. ACO based controller is employed to extract fundamental component of current from non-sinusoidal currents of the considered supply system. Ant colony optimization (ACO) is a novel searching technique used in optimization problems. This paper describes ACO approach for optimization of coefficients of digital filters. In a design example, the order of a low pass filter and the parameters of its coefficients have been optimized in a discrete search space. AC analysis of the optimized filter has been conducted. Hybrid filter utilizing the merits of both shunt passive filter and shunt active filter for better compensation performance is applied in this work. Simulation and analysis of three phase four wire hybrid active power filter under distorted source conditions have been incorporated using MATLAB/ SIMULINK. The detailed simulation level results have been presented to validate the proposed methodology. The results show that filters obtained by ACO have simpler structures and better performance. KEYWORD: Hybrid active power filter, THD, Ant Colony Optimization, PI controller.