Study On Hydrogen-Efficiency Operation Strategy And Capacity Optimization Of Energy Storage Device For Fuel Cell Hybrid Train

Global warming issues are getting more and more attention.The Chinese government strives to achieve carbon peaking by 2030 and carbon neutrality by 2060.One of the important ways to achieve this goal is to vigorously develop and utilize renewable and clean energy.Among them,hydrogen fuel has received extensive attention due to its clean and renewable characteristics.The technology of hydrogen fuel cell trains using hydrogen fuel as traction energy is currently developing rapidly.In order to further reduce the operating cost,the current research on the hydrogen saving method of fuel cell trains mainly considers three aspects: train speed trajectory,energy management strategy and energy storage device.For the large-scale integrated system of the fuel cell train,there is a closely coupled energy relationship between the above three,which has a significant impact on the hydrogen-saving performance of the train,and it is worthy of in-depth study.Therefore,in order to save hydrogen consumption to the greatest extent,this paper studies the hydrogen-saving operation strategy and energy storage capacity optimization of fuel cell trains from the perspectives of train speed trajectory,energy management strategy and energy storage device.The main work is as follows:(1)Based on the actual train parameters and line information,a time-based mixed integer linear programming model is established in this paper.Using this model,a cooptimization method is realized to concurrently optimize train operation and energy management.Compared with the traditional sequential optimization method the train operation and energy management strategies,the co-optimization method proposed in this dissertation can further reduce the net hydrogen consumption.(2)This dissertation studies the influence mechanism of energy storage device capacity on hydrogen consumption of fuel-cell trains.By adjusting the capacity of the energy storage device,from the perspective of the recovery of regenerative energy by the energy storage device and the average working efficiency of the fuel cell,the energy interaction relationship between the fuel cell and the energy storage device is analyzed,and the fuel caused by the change of the energy storage capacity is studied.Changes in hydrogen consumption of battery trains to explore the internal influence mechanism of energy storage capacity on system hydrogen consumption.(3)Based on the research on the influence mechanism of the energy storage equipment on the system hydrogen consumption,the optimization problem of the capacity allocation of the energy storage equipment of the fuel cell train is studied in this paper.On the basis of fully considering the nonlinear efficiency characteristics of fuel cells and the dynamic characteristics of energy storage equipment,this dissertation proposes an optimization method based on mixed integer programming,which can realize the optimal capacity configuration of the energy storage equipment of fuel-cell trains with limited budget.