考虑电解槽动态特性的电-氢-化工耦合系统最优运行方法

An Optimal Operation Method of the On-Grid Coupled Wind-Photovoltaic-Hydrogen-Chemical System Considering the Dynamic Characteristics of Electrolyzers

考虑到电解槽动态运行及化工系统H_(2)的需求,以风光-氢-化工耦合系统总费用最小为目标,提出了风光-氢-化工耦合系统最优运行方法。通过建立电解槽多状态转换模型,刻画电解槽冷热备用状态及非线性输出特征。为了应对系统的化工过程中H_(2)需求的波动性要求,构建H_(2)公共工程的波动性约束。通过算例仿真对比分析了电解槽动态运行及化工过程的H_(2)需求波动性要求对耦合系统运行策略及收益的影响。仿真结果表明,所提运行模型协调优化了电解槽启停、风光出力波动与化工系统氢需求,实现了弃电量的优化,提升了耦合系统的整体运行收益。

Considering the dynamic operation of the electrolyzer and the fluctuating hydrogen demand of the chemical process system H_(2),this paper proposes an optimal operation method of the wind-hydrogen-chemical coupling system with the minimum total cost of the coupling of wind-solar resources and hydrogenation system as the goal.The cold and hot standby state and nonlinear output characteristics of the electrolyzer are described by establishing the multi-state transition model.To address the volatile requirements of H_(2)demand in the chemical process of the system,a volatility constraint for H_(2)public works is constructed.A comparative case is used to analyze the influence of dynamic operation of electrolytic cell and hydrogen demand fluctuation requirements on the operation strategy and income of the coupled system.The simulation results show that the proposed operating model is able to coordinate and optimize the start stop of the electrolytic cell,the fluctuation of wind and solar power output,and the hydrogen demand of the chemical system,achieving the optimization of abandoned electricity and improving the overall operating efficiency of the coupled system.