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© 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.
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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