In recent years

with the rapid development of renewable energy electrolysis technology

the durability of electrolyzers has attracted much attention. To address the issue of lifespan degradation caused by fluctuating operation of electrolysis cells in renewable energy hydrogen production

a dual-layer operation optimization method for a wind-solar-hydrogen integrated system that takes into account the lifespan of the electrolyzers is proposed. Firstly

A multi-state operation characterization model for the electrolytic cell is constructed with consideration of the idle

production

hot standby

and fault states of the electrolyzer. Then

a dual-layer scheduling framework for the integrated wind-solar-hydrogen system is proposed. Based on the wind-solar output forecasting and regular multi-tank power allocation strategy in the outer layer

the daily start-stop scheme of the electrolyzer is optimized. In the inner layer

a multi-dimensional lifetime function is constructed for a single electrolyzer to optimize operation scheduling. Finally

a rotating strategy for the electrolyzer is introduced

based on the average lifespan of the entire electrolyzer

to achieve balanced the lifespan degradation of the electrolyzer with multiple stacks. The results of three hydrogen production control scenarios indicate that the system can switch the electrolyzer state reasonably according to changes in conditions

achieving energy balance in the system. The utilization rate of renewable energy is improved within various constraints. The electrolyzer efficiency has been improved by 1%~5%

and the service life of the electrolyzer has been extended by 15%~35%

making the life decay of the multi stack electrolyzer system more balanced. This study provides an effective technical path for enhancing the capacity of new energy consumption and efficient utilization of hydrogen energy

and has guiding value for related demonstration projects.