Digital implementation of fuzzy control algorithm for shunt active filter

The paper deals with a digital-signal-processor (DSP)-based implementation of a Fuzzy control algorithm for a three-phase active filter (AF). The labo ratory prototype model of the AF uses voltage source inverter (VSI) with pu lse-width modulation (PWM) current control technique. The AF is employed to compensate harmonics and reactive power of a non-linear load. A three-phas e diode bridge rectifier with resistive-inductive load is taken as a non-li near load. With a view to obtain the steady-state and transient response of the AF system, its mathematical model is developed. Experimental verificat ion of simulated results is carried out to validate the proposed fuzzy cont rol techniques for AF systems.