Integrated Power Management Strategy for Multisource Hybrid Power Systems in Fuel Cell Vessels: Focusing on Dynamic Lifetime Extension and Optimal Hydrogen Consumption

This article proposes a novel integrated power management strategy (IPMS) focusing on dynamic lifetime extension and optimal hydrogen consumption, offering a comprehensive solution for fuel cell vessels in terms of power durability and fuel economy. The proposed IPMS coordinates the power management of three systems: the multi-stack fuel cell system (MS-FCS), the multipack battery storage system (MP-BSS), and the multisource hybrid power system (MS-HPS). For the MS-FCS, an analog virtual synchronous generator controller with adaptive inertia and damping regulation is designed to mitigate transient power fluctuations, and provide differentiated transient power response rates for fuel cells with varying degradation levels, thus ensuring balanced performance degradation across the entire system. For the MP-BSS, a distributed multiobjective cooperative controller based on dynamic diffusion algorithms is designed to achieve dynamic state-of-health balancing, proportional power distribution, and bus voltage restoration, ensuring consistent remaining lifetime across the MP-BSS. For the MS-HPS, an online economic dispatch scheme with adaptive average state-of-charge (SOC) regulation is proposed, which maintains the average SOC of the MP-BSS within a safe range while minimizing the hydrogen consumption of MS-FCS. Finally, the StarSim-based experimental results demonstrate that the proposed IPMS improves MS-FCS durability by 13.85%, improves MP-PBS durability by 42.86%, and reduces total hydrogen consumption by 7.27%.