Pulsed Power Load Compensation for More Electric Aircraft Using Improved Active Capacitor Converter

With the increasing use of pulsed loads, the power quality issues in the power supply system of more electric aircraft (MEA) have become increasingly severe. Pulsed loads with a high peak-to-average power ratio (PApr)can cause significant bus voltage drops, affecting system stability. Using large-value passive capacitors can effectively suppress voltage fluctuations. However, their size and weight are often unacceptable. Existing general-purpose two-terminal active capacitor converter (ACC) typically employ full-bridge converters, with relatively low equivalent capacitance multiplication factors, making them unsuitable for applications requiring high capacitance values. This paper proposes a variable ACC capable of achieving a higher capacitance multiplication factor while more accurately emulating the characteristics of a passive capacitor. The designed ACC can intelligently mitigate the impact of pulsed loads, providing a highly promising solution for power management in MEA. The working principle of the proposed ACC is described in detail, and its effectiveness is validated through simulations.