Research On Optimal Scheduling Of Wind-Storage Combined System Based On Hydrogen Production And Energy Storage

Accelerating the research and breakthrough of various forms of energy storage technology and configuring a certain amount of energy storage equipment for wind power is an important method to connect the large-scale wind power to the power grid and ensure the grid operate economically and stably.The joint operation of wind power and hydrogen production and storage realizes energy conversion and storage,and provides raw materials for hydrogen-related industries through the production and sale of hydrogen.It is of great significance to study the joint operation of wind-hydrogen system to promote wind power consumption and improve the country’s future energy application system.In this paper,the capacity of the wind-hydrogen system is optimized.Taking the volatility of wind power into account,an optimal scheduling model for the windhydrogen is put forward.The research contents and results include the following:Firstly,the construction of the wind-hydrogen coupled operation system is built,and the mathematical model of the hydrogen storage system is established.On the basis of researching the characteristics of wind power and taking the development status of the hydrogen storage into account,three kinds of equipment are selected to establish the structure of hydrogen storage system.The chemical reaction process inside the hydrogen storage equipment is studied.The components of the hydrogen storage system are mathematically modeled.Secondly,a capacity optimization scheme of wind-hydrogen system is proposed which smoothes payload curve while reducing input costs.Taking the system construction,operation and maintenance cost and the minimum variance of the system payload as the objective functions,considering the internal constraints of the hydrogen production energy storage system,the capacity of the hydrogen storage system is optimized.To solve the problem,NSGA-II is introduced.Based on the above method,a hydrogen production energy storage system with a suitable capacity is configured for a wind farm with a given capacity in the example area.Finally,an optimal dispatch model of the combined wind-storage system based on hydrogen production and energy storage is established which improves the utilization rate of wind power and enhances the economy of the system.The uncertainty of wind power output is modeled by robust optimization and a conservative adjustment factor to balance the economy and robustness of problem solving is introduced.Taking the total cost of the system(including the operating cost of thermal units,the penalty cost of wind abandonment,the cost of compressed hydrogen storage and the revenue of the system’s external hydrogen sales)as the objective function,considering the internal constraints of the wind-hydrogen coupled power generation system,the wind-storage combined system based on hydrogen production and energy storage is optimal scheduled.The numerical example proves the rationality and validity of the model.The optimal dispatching method of wind-storage combined system based on hydrogen production and energy storage proposed in this paper has certain reference value for the related research and engineering application of wind-hydrogen production and energy storage combined operation.