this paper establishes a collaborative optimization model of technology selection and capacity allocation for the photovoltaic-fuel cell-electrolyzer-hydrogen storage-lithium battery coupling system
accounting for component cost uncertainty. Proton exchange membrane fuel cells
proton exchange membrane electrolyzers
and reversible solid oxide cells are optional hydrogen-electricity conversion technologies. Results revealed that the technical path selected and variations in component prices have a significant effect on the system configuration. Reversible solid oxide cells are able to operate in dual modes
resulting in high equipment utilization and economy
offering greater advantages over lithium battery storage technology
and proton exchange membrane cells. The levelized cost of energy ranges in [0.40
1.15] RMB/kWh. However
the electricity-hydrogen coupling technology route based on proton exchange membrane cells has greater advantages when the cost of reversible solid oxide cells is more than 20000 RMB/kW and the cost of proton exchange membrane electrolyzers is less than 2500 RMB/kW. When the cost of reversible solid oxide cells and proton exchange membrane electrolyzers is higher than 16000 RMB/kW and 4000 RMB/kW
respectively
and the cost of lithium batteries is as low as 400 RMB/kWh
it is only suitable to use lithium batteries as energy storage components. Under those scenarios
the levelized cost of energy is less than 0.73 RMB/kWh.
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