Modeling And Economical Analysis Of The Integrated System Of Wind-hydrogen

China has abundant wind energy resources and the wind power capacity increases year by year.But the "abandoning of wind" becomes more seriously,which hindered the further development of wind power industry.Therefore,the research of reducing the rate of abandoned wind seems imminently.Generally,in view of the convenient installation,flexible configuration and the rapid response capability,energy storage technology makes a great contribution to the power balance and higher efficiency of the renewable energy by timely and accurate absorption or release of energy.Considering hydrogen energy storage technology having advantages such as environment friendly and high utilization,this paper proposes a hybrid power generation system which is integrated by a doubly-fed induction motor system and an energy storage system which comprises a water electrolysis hydrogen production unit,a compressed hydrogen storage unit and a fuel cell unit.The main research contents of this paper are as follows:1)Based on the analytical model of all the units,we build the corresponding simulation model of each unit in the wind power and hydrogen energy coupling system,prove the validity of each unit’s modeling by reasonable simulation results.2)According to various characteristics of different units and the requirements of the connected grid,we design corresponding control strategies and optimal energy distribution algorithms,achieve the energy optimization of the system and improve the utilization rate of abandoned wind.Moreover,taking Zhangjiakou Wind coupled hydrogen demonstration project as an example,we build a simulation model of such a real system in MATLAB/Simulink,verify the rationality of system modeling and effectiveness of the energy optimization algorithm.3)Based on economic analysis of wind power-hydrogen coupling system,we construct a revenue function,and through calculating its internal rate of return,we verify the project’s implementation taking the Zhangjiakou Wind coupled hydrogen demonstration project as an example.