考虑制氢效率特性的风氢系统容量优化

针对利用风电制氢导致电解槽间歇式运行的问题,提出了考虑制氢效率特性的风氢系统容量配置优化方法。首先研究了电解槽的制氢效率特性,评估电解槽的最优工作区间;在此基础上,采取电网辅助购电策略,维持电解槽的最优运行;考虑售电收益、售氢收益、投资运维成本和弃风成本,以风氢系统联合收益最大化为目标,计及风氢系统稳定运行约束和风电出力爬坡约束,合理地分配风电上网功率和制氢功率。文章联合风电外送输电工程进行了风氢系统容量配置优化,为风氢系统的容量优化提供新思路。

Optimal sizing of a wind-hydrogen system under consideration of the efficiency characteristics of electrolysers

In view of the intermittent operation of electrolyser caused by hydrogen production from wind power,an optimal sizing method of a wind-hydrogen system considering the electrolysis efficiency characteristics is proposed in this paper.Firstly,the hydrogen production efficiency characteristics of the electrolyser is studied and the optimal working interval of electrolyser is obtained.Then the grid-assisted power purchase strategy is adopted to maintain the optimal operation of electrolyser.Considering the revenues from electricity selling and hydrogen selling,the costs of investment operation and maintenance and the penalty cost of wind curtailment,aiming at the maximization of the joint benefits of the wind-hydrogen system,taking into account the stable operation constraints and the wind power fluctuation constraint,the power of wind power integration and hydrogen production are reasonably distributed.The optimal size of a wind-hydrogen system is evaluated by combining with the wind power transmission projects,which providing a new idea for the capacity optimization of wind-hydrogen system.