Performance Investigation of Active Power Line Conditioner using Simulink

Active power conditioners have been developed over the years to solve the problems to improve power quality. Among which shunt active power conditioners is used to eliminate load current harmonics and reactive power compensation. The controller ensures that the dc-side capacitor voltage is nearly constant with small ripple besides extracting fundamental reference currents. The PLL block assists the active filter to function even under distorted voltage or current conditions. The shunt APLC system is implemented with voltage source inverter and is connected at PCC for compensating the reactive power. The shunt APLC system is modeled and investigated under unbalanced nonlinear load conditions using MATLAB simulation. The simulation results reveal that the active power filter line conditioner is effectively compensating the reactive power and improves power factor at point of common coupling. Keywords— Active power line conditioners (APLC), PWM inverter, PLL, PI, PID, Fuzzy logic controller and Hysteresis current controller (HCC).