Research On The Energy Management Strategy Of Special Vehicle For Supply And Distribution Control System

With the continuous development of energy storage technology and power electronic technology,hybrid special vehicles and all-electric special vehicles are gradually applied to the military field.With the wide application of special vehicle and equipment electrification,the voltage and power level of the vehicle electric load gradually increased.This increases the demand for power and voltage levels of the vehicle for distribution power supply.Traditional low voltage and small power supply and distribution systems have been unable to meet the increasing demand of electric load.On the other hand,the types of power supply for vehicles are also from single vehicle generators for distribution to current generators,batteries and supercapacitors for power distribution modes.With the rapid development of the vehicle supply and distribution system,its structure has become more and more complicated.Can realize to contain composite power supply and distribution system is stable and reliable power supply and distribution control,guarantee safe and reliable operation of the load of the electrical vehicle is the key problems of hybrid electric vehicle system.Efficient energy management is carried out for the power control system of complex power supply,and improving the utilization of electric power has become a hot issue in the current vehicle supply and distribution control system.In this paper,the energy management strategy of special vehicle supply and distribution control system is studied.The main contents are as follows.First of all,the structure and working principle of special vehicle supply and distribution control system are studied.The energy storage system,bidirectional DC/DC converter,charging and discharge controller are studied and the mathematical model is established.Then,the compound power controller in the system is studied.Complete control of its hardware circuit design and software design,including selection of key devices,the core control circuit,IGBT drive circuit,power supply circuit,analog acquisition circuit and initialization program,interrupt program,lift pressure mode switch design of hard and soft parts.Then,the paper puts forward a kind of vehicle energy management strategy based on dynamic programming method,to the state variables,control variables,objective function and constraint conditions of design,and the energy management strategy through simulation results verify the validity of the algorithm.Finally,a semi-physical simulation experiment platform is built,and the power control system and power distribution energy management strategy of the vehicle are designed in this paper.Set up the composite power controller prototype and carry out the prototype experiment.The experimental results show that the composite power controller designed in this paper can realize the accurate control of special vehicle supply and distribution system,and the voltage level provided can meet the system requirements.On the basis of the composite power controller prototype,the vehicle supply and distribution energy management strategy proposed in this paper is used for experimental verification.In this paper,the parameters of battery and supercapacitors are analyzed in this paper to demonstrate the effectiveness of the proposed method.