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Energy management strategy for a novel multi-stack integrated hydrogen energy storage system based on hybrid rules and optimization

Author

Listed:
  • Lu, Xinyu
  • Gang, Wenjie
  • Cai, Shanshan
  • Tu, Zhengkai

Abstract

To improve the performance of off-grid energy systems, based on a novel multi-stack integrated hydrogen energy storage system, a full life cycle energy management strategy (EMS) with hybrid rules and optimization is proposed. Such a system consists of four PEMECs, four PEMFCs, and a battery pack. The proposed EMS includes online parameter estimation, rule-based primary allocation, and optimization-based secondary allocation. The power is firstly allocated among PEMEC/PEMFC stacks according to a daisy-chained rule based on high efficiency range and multi-stack voltage degradation consistency. The remaining fluctuating power is then preferentially absorbed by the battery using a Q-learning reinforcement learning algorithm. Under stochastic wind power, photovoltaic, and regular load, a comparative analysis with three common EMS validates the feasibility of the proposed EMS. Compared to Q-DC and SOC-DC, the voltage degradation of the multi-stack PEMFCs is reduced by 13.9 %, and the lifetime is improved by 17.2 % and 15.7 %, saving 1315 kg and 1190 kg of hydrogen, respectively. Compared to SOC-PDC and SOC-DC, the lifetime of the battery is improved by 18.8 % and 20.8 %, respectively. The annualized cost of system based on the proposed EMS is the smallest, with reductions of 3 %, 7.4 %, and 9.2 %, respectively.

Suggested Citation

  • Lu, Xinyu & Gang, Wenjie & Cai, Shanshan & Tu, Zhengkai, 2025. "Energy management strategy for a novel multi-stack integrated hydrogen energy storage system based on hybrid rules and optimization," Applied Energy, Elsevier, vol. 381(C).
    • Handle: RePEc:eee:appene:v:381:y:2025:i:c:s030626192402573x
    DOI: 10.1016/j.apenergy.2024.125189
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