On-line electrical quality improvement of a single phase boost rectifier with fuzzy controller and experimental designs

Abstract

This paper shows the validity of experimental design methodology as an efficient on-line tuning tool for a fuzzy logic controller (FLC) dedicated to electrical engineering applications with multi-objective criteria. Our purpose is to improve the input and output system characteristics as well as the global quality of electrical power. Experimental designs give FLC parameters effects with a reduced number of experiments and allow to estimate the response surface for the selected criteria. Factor effects are dependant on the chosen levels of the experimental parameters but the estimated response surface analytical optimum can be found between those levels. The desirability notion combines here time dynamic and harmonic criteria for a boost rectifier with unity power factor correction and illustrates the trade-off that has to be made between the different properties. Criteria improvements with the tuned FLC are sizeable in comparison with a PI linear controller.