基于功率分配策略的风光互补复合制氢系统与容量优化

Wind-solar hybrid hydrogen production system and capacity optimization based on power allocation strategy

风光发电制氢可以将波动可再生能源转化为高品质的氢能,但风光的不稳定性也带来电解槽频繁启停和资源利用率低的问题。基于风光互补发电特征分析,结合碱性电解水制氢(Alkaline Electrolyzer,AEL)与质子交换膜电解水制氢(Proton Exchage Membrane Electrolyzer,PEMEL)的运行特性,提出了风光互补复合制氢系统的功率分配协同运行策略与容量优化方法,实现对风光发电能源的灵活消纳。结合案例分析结果表明:风光互补发电方式降低了资源波动性对电解槽的影响,AEL与PEMEL的平均负载率较单一风电场景分别提高91.08%、39.90%;同时,通过采用功率分配策略,复合制氢系统的制氢量提升了6.1%,并有效减少了PEMEL电解槽的启停次数。相较单一的AEL与单一的PEMEL制氢系统,容量优化后的复合制氢系统制氢量提升7.4%,单位制氢成本达到35.3元/kg。研究成果可为实现风光制氢系统的高效与协同运行提供参考。(图10,表3,参27)

Through hydrogen production based on wind-solar power generation,variable renewable energy can be converted into highquality hydrogen.However,the instability of wind and solar energy also leads to the frequent start-up and shutdown of the electrolyzer,as well as the low rate of resource utilization.Herein,the power allocation and cooperative operation strategy and the capacity optimization method for the wind-solar hybrid hydrogen production system were proposed based on the characteristics of wind-solar power generation in combination with the operational performance of alkaline electrolyzer(AEL)and proton exchange membrane electrolyzer(PEMEL)for hydrogen production.The case analysis shows that wind-solar power generation has reduced the impact of resource volatility on the electrolyzer,the average load rates of AEL and PEMEL are 91.08% and 39.90% higher than that of a single wind power scenario.In addition,the hydrogen production capacity is increased by 6.1%by adopting the power allocation strategy,and the start-up/shutdown times of the PEMEL electrolyzer are reduced.Compared with individual AEL and PEMEL hydrogen production system,the hybrid hydrogen production system after capacity optimization has its hydrogen production capacity increased by 7.4%,with the unit hydrogen production cost reaching 35.3 yuan/kg.The research results could provide a reference for the efficient and cooperative operation of wind-solar hybrid hydrogen production system.