Composite Energy Management And Control System Of Pure Electric Road Rail Vehicle

Aiming at the shortcomings of traditional dual-purpose vehicle in energy saving,environmental protection and energy conversion efficiency,this paper takes the existing pure electric road rail dual-purpose vehicle as the research object,designs the dual-purpose vehicle supply system using composite power supply,expounds its power system composition and energy flow process in the process of vehicle operation,and puts forward the energy distribution formula of fuzzy control composite power supply The control system model and MATLAB simulation model are built to simulate the endurance of vehicle under constant speed condition and the loss and capacity of composite power supply under highway operation mode.The results show that for the short distance transportation from the railway station to the nearest logistics park,the hybrid power distribution method proposed in this paper has the advantages of long endurance,high operation efficiency and sufficient power.（1）This paper mainly focuses on the problems of low energy efficiency of traditional diesel powered dual-purpose vehicle,serious wear of rubber wheels of dual-purpose vehicle with only one wheelset,low recovery ratio and efficiency of braking energy recovery system,excessive instantaneous driving power provided by battery affecting battery life,low utilization rate caused by long-time static charging of electric heavy truck,and insufficient independent transportation efficiency of road and railway This paper presents an improved scheme of pure electric road rail vehicle based on composite power supply.（2）This paper mainly describes a hybrid power supply energy management and control system of pure electric road rail dual-purpose vehicle.Compared with the traditional pure electric special vehicle,there are two significant differences,namely,no external charging interface and two sets of independently running wheelsets,which are determined based on the actual production and the current situation that the popularization rate of electrified railway in China is not enough.The system mainly includes: On-board main controller,signal conditioning circuit,drive isolation circuit,various parameter acquisition sensors during the operation of dual-purpose vehicle,PTC temperature control module,AC / DC bidirectional inverter,DC / DC bidirectional conversion circuit,steering power and axle lifting switching hydraulic pump,energy storage composite power supply,drive motor and its supporting facilities,on-board equipment power supply,on-board communication bus And positioning device,console and other devices.The goal is to achieve the efficient conversion of kinetic energy and electric energy.In the railway mode,the energy storage device of dual-purpose vehicle can be supplied with electric energy in time through the axle power generation facilities.In the highway mode,the lithium battery can work in the best temperature range,and the efficient use of electric energy can be recovered through braking.（3）Due to the lack of literature on road rail dual-purpose vehicle,the author starts from the ordinary household low-power electric vehicle,and then optimizes the parameter configuration according to the use conditions of electric dual-purpose vehicle.Considering the distance between the railway station and the logistics distribution center,the endurance design of pure electric dual-purpose vehicle does not have to pursue too much,and takes into account the frequent speed increase and speed decrease of urban road conditions For the traditional train equipped with low-power axle generator as the starting point and the motor driving and braking two state transformation,this paper puts forward the traction power generation charging mode;for the lack of research on the low-temperature performance of onboard power in other literature,this paper combines with the battery insulation technology to do some research;for the lack of research on the low-temperature performance of on-board power in other literature,this paper makes some research on the battery insulation technology In the past research,the single fuzzy control method of composite power supply is insufficient,and the double fuzzy control of driving and braking is introduced to optimize the control results;for the scheme of using genetic algorithm to optimize the fuzzy control results mentioned in some literatures,considering the computational power and experimental effect of vehicle master control,this paper holds a conservative attitude;finally,the performance of super capacitor and lithium battery under different control methods is analyzed Simulation experiment analysis.