A current source active power filter with minimum requirement of current sensors

This work presents a control strategy for a current-source active power filter in which a minimum number of current sensors is used. The derivation of a simplified model for the active power filter and the selection of compensators for its controller are also presented. Simulation results show that the proposed active filter system can compensate effectively both harmonic currents and reactive power of nonlinear load. Furthermore, its performance is still maintained under unbalanced and/or distorted condition of the mains.