Study On Energy Efficiency Improvement Method Of Hydrogen Fuel Cell Hybrid Tram Operation

Nowadays,the urban traffic because of its characteristics such as pollution,noise and health has caused more and more attention,the fuel cell hybrid electric vehicles as a result of high efficiency,environmental protection,energy saving,the advantages of large capacity,high speed,safety,has good prospects for development in the future,is a trend in the development of the future of rail transit vehicles,this paper focuses on hydrogen fuel cell hybrid electric rail transit vehicle running status of the different power sources of hybrid system with output distribution optimization research,study and formulate the vehicle energy management strategy of hybrid system operation process,The purpose of optimizing the distribution of mechanical braking force and electric braking force in vehicle running speed curve and braking process is to reduce the energy consumption and reduce the hydrogen consumption.Based on the above research requirements,the main work of this paper is as follows:Based on streetcars running condition,vehicle running basic resistance,auxiliary power consumption,vehicle quality and efficiency of traction power system of vehicle traction system parameters,such as energy consumption analysis,according to the requirements of vehicle operation energy consumption and power source parameter matching of hybrid system,the configuration meet the operation requirements of fuel cell vehicle,power battery and super capacitor parameters,based on the configuration of the power supply parameters of structures,hybrid vehicle powertrain Simulink simulation model.In order to reduce energy consumption of traction power system in the operation of the vehicle at the same time,effectively adjust the SoC of energy storage system,based on the hybrid simulation model is set up by the Simulink based on efficiency optimization and energy management method of hybrid system SoC management,considering the energy storage system is established in this method the equivalent hydrogen consumption of SoC management objective function,energy storage system SoC management include energy storage system status SoC consistency between the management and the same type of energy storage management,at the same time ADMM and PSO were used respectively to two kinds of optimization algorithm to solve the three power output.In order to ensure the stability of bus voltage of vehicle power system,this paper proposes a bus voltage control strategy based on droop,which increases the regulation amount of bus voltage deviation on the basis of the power source output optimized above,and the final result is the actual control amount of vehicle power control system.In order to verify the timeliness and correctness of the energy management method,the rt-lab semi-physical real-time simulation platform is built in this paper.According to the simulation results,the energy management method can effectively allocate the power source output and better adjust the SoC of the energy storage system.At the same time,bus voltage control strategy based on droop can effectively manage bus voltage of vehicle power system.In order to reduce energy consumption of vehicle running resistance of basic,in this paper,based on the speed of the vehicle running speed adjusting optimization method,the method includes vehicle range speed optimization strategy and speed adjusting strategy,the vehicle station spacing interval velocity optimization strategy based on vehicle site,operation time is running resistance,highest speed and basic optimization parameters such as vehicle speed,vehicle running resistance according to the speed when the basic minimum energy consumption,speed adjusting strategy in actual operation speed deviation from the optimal vehicle reference speed is to adjust the vehicle speed,achieving the punctual arrival of vehicles.In order to improve the recovery rate of braking energy,the optimal braking force distribution strategy of electric braking and mechanical braking is proposed to recover more braking energy on the premise that the braking distance is up to the requirement.In order to extend the service life of the braking resistance system,the load distribution strategy of the braking resistance is adopted to realize the uniform consumption of each set of braking resistance load and the uniform service life of each set of braking resistance,so as to extend the overall service life.