Study on the Flexible Scheduling Strategy of Water–Electricity–Hydrogen Systems in Oceanic Island Groups Enabled by Hydrogen-Powered Ships

Qiang Wang, Binbin Long () and An Zhang
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Qiang Wang: College of Electrical and New Energy, China Three Gorges University, Yichang 443002, China
Binbin Long: College of Electrical and New Energy, China Three Gorges University, Yichang 443002, China
An Zhang: College of Electrical and New Energy, China Three Gorges University, Yichang 443002, China

Energies, 2025, vol. 18, issue 14, 1-23

Abstract: In order to improve energy utilization efficiency and the flexibility of resource transfer in oceanic-island-group microgrids, a water–electricity–hydrogen flexible scheduling strategy based on a multi-rate hydrogen-powered ship is proposed. First, the characteristics of the seawater desalination unit (SDU), proton exchange membrane electrolyzer (PEMEL), and battery system (BS) in consuming surplus renewable energy on resource islands are analyzed. The variable-efficiency operation characteristics of the SDU and PEMEL are established, and the effect of battery life loss is also taken into account. Second, a spatio-temporal model for the multi-rate hydrogen-powered ship is proposed to incorporate speed adjustment into the system optimization framework for flexible resource transfer among islands. Finally, with the goal of minimizing the total cost of the system, a flexible water–electricity–hydrogen hybrid resource transfer model is constructed, and a certain island group in the South China Sea is used as an example for simulation and analysis. The results show that the proposed scheduling strategy can effectively reduce energy loss, promote renewable energy absorption, and improve the flexibility of resource transfer.

Keywords: oceanic-island-group microgrids; proton exchange membrane electrolyzer; seawater desalination unit; hydrogen-powered ship; flexible scheduling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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