Shunt Active Power Filters Applied in the Aircraft Power Utility

An aircraft shunt active power filter using three-phase four-leg converter is proposed in this paper. The SAPF provide an appropriate solution for the neutral current in three-phase four-wire system and the suitable current controller in higher frequency aircraft power systems. The fixed frequency current controller adopting 3DSVM strategy is applied to balance the asymmetrical current. The simulation results convince that the proposed active filter can compensate the harmonics, reactive and unbalanced currents totally. With a high performance, the SAPF can also be applied in the general three-phase four-wire power system