计及光伏出力时序不确定性的电制氢多机集群优化调度  

Optimal Scheduling of Multi-electrolyzer Power-to-Hydrogen Clusters Considering the Temporal Uncertainty of Photovoltaic Power

作　　者：周步祥[1] 吴晨旭 邱一苇 臧天磊 朱杰[1] 周毅[1] ZHOU Buxiang;WU Chenxu;QIU Yiwei;ZANG Tianlei;ZHU Jie;ZHOU Yi(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,成都市610065

出　　处：《电力建设》2023年第9期108-117,共10页Electric Power Construction

基　　金：国家重点研发计划项目(2021YFB4000503);国家自然科学基金项目(51907099)。

摘　　要：受制氢机单机容量限制,电制氢厂站由多台制氢机构成集群,以满足光伏制氢一体化工程的规模化需求。考虑到制氢机启停、爬坡调节惯性,提出集群调度方法,动态调整启停状态及功率分配,以适应光伏出力的时序不确定性。首先,基于伊藤理论建模光伏出力的连续时间随机过程;而后,构建制氢机集群调度的随机优化模型;继而,基于随机微分方程的轨迹灵敏度展开,将随机规划变换为确定性优化求解;最后,根据所得制氢机启、停指令及功率分配的仿射控制律,实现滚动优化。基于内蒙古自治区某在建工程的算例分析表明,对比确定性优化方法,所提方法可提升光伏消纳和制氢收益。Limited by the individual capacity of the electrolyzer,a hydrogen production plant requires multiple electrolyzers to form a cluster and meet the scale requirements of the integrated photovoltaic hydrogen project.Considering the startup/shutdown and ramping inertia of the electrolyzers,it is necessary to propose a scheduling method for the electrolyzer cluster system.The proposed method dynamically adjusts the startup/shutdown states and power allocation to adapt to the temporally correlated uncertainty of photovoltaic power.First,the continuous-time stochastic process of photovoltaic power is modeled based on It■'s theory,whereby,a stochastic optimization model is constructed for the scheduling of the electrolyzer cluster.Subsequently,by utilizing trajectory sensitivity decomposition based on the stochastic differential equations,the stochastic optimization is transformed into a deterministic one.Finally,a rolling-horizon optimization scheme of the startup/shutdown commands is proposed for the affine control law of power allocation.The case studies based on a demonstration project under construction in Inner Mongolia show that,compared to deterministic optimization,the proposed approach improves the utilization of photovoltaic power,increasing the benefits from hydrogen production.

关 键 词：光伏发电 绿氢 离网制氢 集群调度 伊藤过程 随机优化 

分 类 号：TM73[电气工程—电力系统及自动化]