Stability Analysis and Energy Management of a Novel Electric Power System Unit in All-Electric Aircraft

All-electric aircraft (AEA) power system architecture design is a major area of interest within the field of aviation industry. A critical issue when considering AEA power system architecture design is to ensure high reliability. To address this issue, this paper presents a novel electric power system unit that including a battery, a supercapacitor (SC), dual active bridge (DAB) converters, and a dual three phase (DTP) permanent magnet synchronous motor (PMSM) system. The proposed system unit features a high reliability due to the fault tolerance of the DTP-PMSM system and the isolation of the DAB, as well as a high-power transmission rating of the DAB. Furthermore, a complete power system can be derived by combining multiple units with optimal design. Apart from power system architecture design, a decentralized mixed droop control method is proposed to allocate different frequency power to battery and SC. In addition, corresponding impedance-based stability analysis is conducted to ensure system stability. Finally, the simulation results validate the stability of the system in various circumstances and the efficacy of the proposed control method.