Research On The Optimization And Matching Of The Power Transmission System Of The Hydrogen Fuel Cell Straddle-type Monorail Vehicle

In order to comply with the "dual carbon" concept,the rail transit field is actively exploring the development of rail vehicles based on new energy technology.Hydrogen energy is a clean energy source with zero pollution.It is considered the ultimate energy of the vehicle.This thesis uses hydrogen fuel cells as the main power source and power batteries as auxiliary power sources.For the purpose of economics,conduct in-depth research on the optimization parameter matching of the power transmission system of the hydrogen fuel cell straddle-type monorail vehicle,and conduct research on the energy management strategy of the hydrogen fuel cell straddle-type monorail vehicle and the optimization of the power transmission system parameter based on the power following strategy.The specific research content is as follows:(1)Taking the traditional straddle-type monorail vehicle as the research object,the structure of hydrogen fuel cell straddle-type monorail vehicle is designed.The common power transmission system configurations were analyzed,the advantages and disadvantages of the four configurations and the operating characteristics of hydrogen fuel cell straddle-type monorail vehicles were comprehensively considered,and finally the hybrid power transmission system scheme of fuel cell and power battery was selected.(2)Design and establish a complete vehicle model for the matching design of the key components of the power transmission system of the hydrogen fuel cell.Analyze the mechanical properties of the vehicle.On this basis,the motor,hydrogen fuel cell and power battery are designed to match the vehicle,hydrogen fuel cell and power battery according to the vehicle parameters and performance targets.According to the vehicle layout scheme,use AVL CRUISE simulation software to build a simulation model of a hydrogen fuel cell straddle-type monorail vehicle,and analyze its power performance to verify the rationality of the power transmission system matching design.(3)Research and joint simulation of energy management strategies for hydrogen fuel cell straddle-type monorail vehicles.Aiming at the problem that the hydrogen fuel cell straddle-type monorail vehicle has no energy management strategy,this thesis analyzes two energy management strategies,comprehensively considering the operating conditions and system operating characteristics of the vehicle to improve the economic and battery life of the vehicle.This thesis uses power to follow the energy management strategy and build an energy management strategy model in Simulink.Establish a joint simulation model based on the CRUISE-SIMULINK platform,and analyze the economic nature of the self-designed actual cyclic driving conditions(URDC)and 40 km / h at constant speed conditions.(4)In order to reduce energy consumption and improve the economic performance of the entire vehicle,the performance of the entire vehicle is optimized.Based on the CRUISE simulation software and ISight optimization software for joint simulation,establish an optimization model,select the optimization algorithm and optimized variables,establish a corresponding objective function to optimize the hydrogen consumption of 100 kilometers,and reduce the hydrogen consumption of 100 kilometers under the premise of ensuring power.Through the above research content,a method of matching the power transmission system of the hydrogen fuel cell straddle-type monorail vehicle was obtained.This article has certain reference value for studying fuel cell rail transit vehicles.