New compensation strategy for three-phase shunt APF based on a-b-c coordinate

The shunt active power filter has proved to be a useful device to eliminate harmonic currents and to compensate reactive power for and linear/nonlinear loads.At present,detecting methods of reactive and harmonic currents based on the instantaneous reactive power theory are main streams.This paper presents a novel approach to determine reference compensation currents.The proposed approach needn't coordinate conversion.Simulation and experiment results show that the proposed approach can work well under source voltage asymmetry,non sine and unbalanced loads.In addition,the proposed approach yields a simpler design of the shunt APF controller.