Power Distribution of the Second-order Hybrid Energy Storage System (HESS) Powered by the More Electric Aircraft (MEA)

With the continuous increase of the power level of the aircraft power system, the switching on/off of high-power pulsed loads represented by airborne radars will cause large fluctuations in the bus voltage, which is likely to cause power quality problems in the power supply system and affect the normal operation of other aircraft equipment. Although the introduction of a first-order hybrid energy storage device in the power distribution control link on the primary side of the aircraft bus can effectively suppress the pulsating power, the lithium battery is still in operation when the bus voltage is stable, resulting in energy waste. In this paper, the first-order filtering function is changed to the second-order, so that the hybrid energy storage device can maintain the original pulsating power suppression function and reduce the energy waste of the hybrid energy storage device in the steady state. The simulation results show that the second-order hybrid energy storage device proposed in this paper reduces the energy loss in the steady state and can effectively reduce the impact of high-power pulsed loads on the aircraft power grid.