The electrolyzer is a key equipment in renewable energy electrolysis hydrogen technology

and its performance directly affects the efficiency

stability

and cost of hydrogen production. An optimization method for the capacity configuration of mixed electrolysis cells in wind solar hydrogen storage systems based on flexibility indicators is proposed. Firstly

a flexibility evaluation index system is constructed from four perspectives：fluctuation adaptability

hydrogen production efficiency

operating conditions

and economy

to comprehensively evaluate the comprehensive performance of electrolysis cells under various operating conditions. Secondly

combining the AHP-DEMATEL method to determine the weight allocation. Finally

the flexibility index is embedded into the optimization framework to conduct research on the configuration strategy of the hybrid hydrogen production system. The simulation results show that the hybrid electrolyzer capacity optimization configuration scheme proposed in this paper is significantly lower in hydrogen production cost than the single electrolyzer configuration scheme

correspondingly higher in hydrogen production volume than the single alkaline electrolyzer scheme

and provides a new method for the selection and evaluation of hybrid electrolyzers.