A Comparative Analysis of PI Controller and Fuzzy Logic Controller for Hybrid Active Power Filter Using Dual Instantaneous Power Theory

This paper presents a fuzzy logic, PI controlled shunt active power filter used to compensate for harmonic distortion in three-phase systems. The Hybrid active power filter employs a simple method for the calculation of the reference compensation current based on Fast Fourier Transform. The presented Hybrid Active Power filter is able to operate in balanced, load conditions. Classic filters may not have satisfactory performance in fast varying conditions. But auto tuned active power filter gives better results for harmonic minimization, and THD improvement. The proposed auto tuned hybrid active power filter maintains the THD well within IEEE-519 standards. The proposed methodology is extensively tested and with improved dynamic behavior of hybrid active power filter using fuzzy logic, PI controllers. The results are found to be quite satisfactory to mitigate harmonic Distortions, and improve quality. The detailed simulations are carried out on MATLAB environment to validate the performance. KeywordsFuzzy Logic Controller (FLC), Hybrid Active Power Filter (HAPF), THD, load compensation, power factor, power quality (PQ), voltage-source inverter (VSI), Proportional-Integral (PI) control.