Incorporating optimal operation strategies into investment planning for wind/electrolyser system

Hybrid wind and electrolyser system is a prevalent configuration to produce green hydrogen. Both planning and operation of such a system are of great importance for achieving its techno-economic value. Previous studies have been focused on either of them, but inadequate attention has been paid to their interaction. This paper proposes a two-stage multiobjective optimization framework to reveal optimal investment plans considering different operational strategies, namely economic revenue maximization and green hydrogen production maximization. The results show that: 1. There exists a trade-off between system investment and the ability to reach better operational performance. For example, the system needs flexibility to improve operational profits but this leads to high investment costs. 2. Differentiated operation objectives result in different component capacities in the planning phase. 3. In terms of a wind and hydrogen system with gas storage, the Pareto optimal design revealing the trade-off between system investment and operational performance would be found along feasible solution boundaries.