Design of Shunt Active Power Filter to eliminate the harmonic cur- rents and to compensate the reactive power under distorted and/or imbalanced source voltages in steady state

The shunt active power filter has proved to be a useful device to eliminate harmonic currents and to compensate reactive pow er for linear/nonlinear loads. This paper presents a novel approach to determine reference compensation currents of the three-phase shunt active power filter (APF) under distorted and/or imbalanced source voltages in steady state. The proposed approach is c ompared with three reviewed shunt APF reference compensation strategies. Results obtained by simulations w ith Matlab and Simulink show that the proposed approach is more effective than the reviewed approaches on compensating reactive power and harmonic/neutral currents of the load, even if the source voltages are severely distorted and imbalanced. In addition, the proposed approach yields a simpler design of the shunt APF controller.