TS-fuzzy-controlled shunt active-power filter for power quality improvement

For the problem of harmonic detection delay by the instantaneous reactive power method, a TS fuzzy logic along with synthetic sinusoid generation technique based shunt active power filter is proposed. The desired reference current are extracted using this algorithm and this method maintains the dc-side capacitor voltage of the inverter nearly constant. The VSI gate switching signals are derived from adaptive-hysteresis current controller so that the modulation frequency remains nearly constant, which will improve the PWM performances and APF substantially. Finally, in this paper, simulation and experimental results of the proposed method show that the dynamic and steady behavior of the active power filter is perfect.