Simulation research on active power filter

The basic principle of APF(Active Power Filter) is introduced,including structures and functions of harmonic reactive current detection circuit and compensation current generation circuit,based on which,methods of harmonic reactive current detection,compensation current control and DC voltage control are introduced.To verify its compensation function and further understand its control methods,a whole three-phase shunt voltage APF system is simulated using Simpower Systems Blockset in Matlab 6.5 / Simulink.Simulation results show that,APF controlled by SVPWM(Space Vector Pulse Width Modulation) can quickly and precisely compensate the harmonic and reactive components of load current.