Simulation of three-phase three-wire shunt active power filter

With the proliferation of nonlinear loads as power electronics equipment, the disadvantage of harmonics is more and more, which influence quality of power grid. Active power filter is a new harmonics restraint method comparing with passive filter, which is a power electronics device. This paper inspects harmonics current based on three-phase circuit instantaneous reactive power theory and simulates three-phase three-wire shunt active power filter. The simulation results validate parameter is reasonable. The outcome indicates that active power filter can restrain harmonics of electrical source current effectively.