Hybrid active power filter based on the IRP theory for harmonic current mitigation

This paper proposes a hybrid active power filter for harmonic current mitigation in nonlinear loads. The hybrid system is composed of a shunt passive filter and an Active Power Filter (APF). The reactive power compensation is achieved by shunt passive filter banks. The scheme presented allows the reduction in size of the active power filter converter, as compared with the needs of a conventional active power filter. The instantaneous reactive power theory is used for this purpose as strategy of control to compensation in three-phase nonlinear loads, This control method allows a simple and effective way to determine compensation currents and achieve a remarkable performance in terms of harmonic mitigation. The authors present the modeling of shunt active power filter, and the simulation results obtained with MATLAB/Simulink®.