An Optimal Operation Method of the On-Grid Coupled Wind-Photovoltaic-Hydrogen-Chemical System Considering the Dynamic Characteristics of Electrolyzers
Considering the dynamic operation of the electrolyzer and the fluctuating hydrogen demand of the chemical process system H2,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 H2 demand in the chemical process of the system,a volatility constraint for H2 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.
chemical systemwind-photovoltaic powerenergy storageelectrolyzersdynamic features
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