Bi-directional isolated multi-port power converter for aircraft HVDC network power transfer

High-voltage direct-current (HVDC) based power distribution networks are an attractive alternative to classical AC distribution networks in more electric aircrafts (MEAs). This paper presents a bi-directional high-frequency transformer isolated multi-port power converter that controls the power flow between three HVDC aircraft networks. Power converter analysis and control laws are provided. Theoretical analyses are verified by extensive simulations. Finally, the converter fault tolerance is tested. Simulation results prove that the transformer isolation reduces the effect of a faulted network to the other networks thus enhancing the fault tolerance of the entire power distribution network.