FEASIBLE DOMAIN ANALYSIS AND OPTIMAL CONTROL OF OPERATING PARAMETERS IN AWE SYSTEMS CONSIDERING SHUNT CURRENTS

Yang Fuquan; Lei Zhaoming; Liu Bin; Yan Rongge; Dong Yan; Sun Hexu

doi:10.19912/j.0254-0096.tynxb.2025-0749

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (9) : 156-171. DOI: 10.19912/j.0254-0096.tynxb.2025-0749

FEASIBLE DOMAIN ANALYSIS AND OPTIMAL CONTROL OF OPERATING PARAMETERS IN AWE SYSTEMS CONSIDERING SHUNT CURRENTS

Yang Fuquan¹, Lei Zhaoming¹, Liu Bin², Yan Rongge¹, Dong Yan¹, Sun Hexu³

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Abstract

In alkaline water electrolysis （AWE） systems powered by renewable energy, elevated hydrogen to oxygen （HTO） concentration caused by power fluctuations poses safety risks, and improper operating parameters lead to reduced system efficiency. To address these issues, this study proposes a coordinated control method based on the feasible domain of operating parameters. First, the influence of temperature variations and shunt currents on the AWE system under fluctuating operating conditions is analyzed, and models for HTO concentration and system efficiency are established, followed by a parameter sensitivity analysis. Then, the feasible domain of AWE operating parameters is determined based on the safety boundaries of current density, pressure, and electrolyte circulation flow rate. Finally, a feasible-domain-based multi-objective optimization control method is proposed for AWE operation under fluctuating conditions, and its effectiveness is verified in photovoltaic and wind power hydrogen production scenarios. The results demonstrate that the proposed method effectively extends the system’s operating hours, increases hydrogen production, enhances the adaptability of the AWE system to renewable energy, and achieves safe and efficient hydrogen production.

Key words

electrolyzer / hydrogen production / current distribution / alkaline water electrolysis / multi-objective optimization / feasible domain / energy conversion efficiency

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Yang Fuquan, Lei Zhaoming, Liu Bin, Yan Rongge, Dong Yan, Sun Hexu. FEASIBLE DOMAIN ANALYSIS AND OPTIMAL CONTROL OF OPERATING PARAMETERS IN AWE SYSTEMS CONSIDERING SHUNT CURRENTS[J]. Acta Energiae Solaris Sinica. 2026, 47(9): 156-171 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0749

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