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Quasi-dynamic dispatch approach for integrated electricity and hydrogen systems with multiphysics-constrained alkaline electrolysis modeling

Lookup NU author(s): Dr Sheng WangORCiD

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Abstract

© 2025This study develops a coordinated dispatch strategy for integrated electricity and hydrogen systems (IEHS), emphasizing the operational significance of incorporating the multiphysics-aware alkaline water electrolysis. First, a high-fidelity alkaline electrolyzer model is proposed to capture the coupled thermal, electrical, and electrochemical behaviors of electrolysis process. This multiphysics-aware electrolyzer model reflects the transient effects of temperature and efficiency variations, thereby improving the hydrogen production flexibility and energy conversion efficiency. Second, a quasi-dynamic dispatch approach is proposed to integrate the electrolysis dynamics into the system-level day-ahead dispatch problem of IEHS. To address the nonconvexity and nonlinearity introduced by the multiphysics-constrained electrolyzer model and the quasi-dynamic hydrogen network model, a tractable convex reformulation is introduced. Third, a sequential cone programming (SCP) algorithm with adaptive penalty mechanisms is tailored to progressively tighten relaxations and accelerate convergence. Numerical results illustrate that the proposed multiphysics-aware electrolyzer model achieves up to 9.44% reduction in the system-wide operating cost compared to the conventional electrolyzer model. The tailored SCP algorithm improves the computational efficiency and ensures high solution accuracy for the quasi-dynamic dispatch problem of IEHS.

Publication metadata

Author(s): Li J, Chen J, Gao X, Han L, Zhai J, Wang S

Publication type: Article

Publication status: Published

Journal: International Journal of Hydrogen Energy

Year: 2025

Volume: 168

Print publication date: 15/09/2025

Online publication date: 25/08/2025

Acceptance date: 16/08/2025

ISSN (print): 0360-3199

ISSN (electronic): 1879-3487

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.ijhydene.2025.151045

DOI: 10.1016/j.ijhydene.2025.151045

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