STUDY ON PHOTOVOLTAIC GREEN HYDROGEN PRODUCTION SYSTEM BASED ON ADAPTIVE CONTROL OF HYBRID ELECTROLYZER

Wang Shunyan; Ren Yongfeng; Zhang Xiaolong; Xue Yu; Liu Peng; Wen Guowei

doi:10.19912/j.0254-0096.tynxb.2023-1936

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (7) : 20-28. DOI: 10.19912/j.0254-0096.tynxb.2023-1936

STUDY ON PHOTOVOLTAIC GREEN HYDROGEN PRODUCTION SYSTEM BASED ON ADAPTIVE CONTROL OF HYBRID ELECTROLYZER

Wang Shunyan¹, Ren Yongfeng¹, Zhang Xiaolong², Xue Yu³, Liu Peng², Wen Guowei⁴

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Abstract

In addressing the issues of renewable energy curtailment and reducing carbon emissions in China, solar hydrogen production has become one of the effective solutions. The paper constructs a hydrogen production system by coupling a photovoltaic array with a mixed electrolyzer connected to AC bus. To enhance the energy efficiency of the photovoltaic power generation system under environmental changes, it employs maximum power point tracking technology based on adaptive step perturb and observe. The DC side of the photovoltaic system utilizes the rapid response and charge-smoothing characteristics of supercapacitors to stabilize the bus voltage. On the grid side, the inverter adopts a virtual synchronous machine control strategy to achieve a rapid response to changes in grid demand, providing grid inertia and frequency support to enhance system stability and reliability. In addressing the issues of energy waste and insufficient adaptability faced by traditional single electrolyzer hydrogen production systems in a fixed operating mode, an electrolyzer adaptive control system is introduced. Combining the advantages of alkaline electrolyzer and proton exchange membrane electrolyzer, this system adjusts the operating mode in real-time based on photovoltaic output power and electrolyzer status, ensuring the system maintains high flexibility and stability in different scenarios. Finally, the correctness and effectiveness of the constructed model and control strategy were verified through simulation.

Key words

PV / hydrogen production / maximum power point tracking technology / adaptive control systems / virtual synchronous generator / mixed electrolytic cell

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Wang Shunyan, Ren Yongfeng, Zhang Xiaolong, Xue Yu, Liu Peng, Wen Guowei. STUDY ON PHOTOVOLTAIC GREEN HYDROGEN PRODUCTION SYSTEM BASED ON ADAPTIVE CONTROL OF HYBRID ELECTROLYZER[J]. Acta Energiae Solaris Sinica. 2024, 45(7): 20-28 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1936

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