Shunt Active Power Filter for Harmonic Mitigation by using Fuzzy Logic Controller

 Abstract— Active filters are widely used in power system for reactive power compensation and voltage / current harmonic elimination. Harmonic contents of the source current has been calculated and compared for the different cases to demonstrate the influence of harmonic extraction circuit on the harmonic compensation characteristic of the shunt active power filter. In this paper, a fuzzy logic controlled, three-phase shunt active filter is used to improve power quality by compensating current harmonics which is required by a nonlinear load. The merit of fuzzy control is that it is based on defined linguistic rules and does not require any mathematical model of the system unlike the other traditional controller. Hence, this paper proposed a control approach and analyzed by simulations.