Abstract
This study considered complementation of the different electrolyzers and designed a new hydrogen production system coupling alkaline (ALK) electrolyzers and the proton exchange membrane (PEM) electrolyzers. A collaborative optimization method is proposed to design both the capacities and the annual energy scheduling of the system. Due to the different operation characteristics and parameters of the two electrolyzers, the operation states of them are described separately in the model. Besides, several practical factors are also considered, including electrolyzer grouping, hydrogen production loss, adjustment response efficiency and switch-on times. According to the calculation results, the annual income of the coupling system is 6.0 % and 28.9 % higher than that of the ALK only and PEM only system. The installed load rates of PEM electrolyzers to the coupling systems are between 10 and 20 %. Furthermore, the influences of multiple factors on the coupling system are also analyzed. After analysis and comparison, hydrogen production and system economy rise with increased wind power installed proportion is rising. Besides, the increase of the allowed proportions of electricity purchase can enhance the stability of system power supply, and improve the hydrogen production and economy.
Published Version
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