Modeling And Energy Management Technology Of Hydrogen Electric EVTOL Hybrid System

EVTOL power system,as one of the important development directions of general aviation,is currently facing the contradiction that short-term power density and long-term energy density are difficult to coordinate.In this paper,according to the working condition demand of e VTOL short-term high power and long-term stable power,the hybrid power scheme of hydrogen fuel cell and supercapacitor is adopted,the equivalent circuit model of hydrogen fuel cell and supercapacitor is built,the hybrid system model and main structure based on MATLAB are designed,and the energy management simulation of hydrogen electric e VTOL hybrid power is carried out.The results show that the hydrogen electric hybrid power system proposed in this paper,combined with fuzzy control algorithm,The coordinated output of e VTOL power density and energy density is optimized,and the purpose of "peak shaving and valley filling" is achieved.Firstly,this paper describes the research background and application prospect of hydrogen fuel cell hybrid power system,analyzes in detail the development status and main research methods of energy management strategies at home and abroad,and puts forward the main research content of this paper according to the power demand under specific working conditions.On this basis,combined with the actual working conditions of hydrogen electric e VTOL,the theoretical analysis of hybrid energy management system is carried out.The principle analysis,parameter calculation and equivalent model drawing are mainly carried out for hydrogen fuel cell,supercapacitor and dc/dc converter,and appropriate supercapacitor charging and discharging parameters and supercapacitor capacity are designed.Secondly,the mathematical model of hydrogen electric e VTOL hybrid energy management system is established.Based on the classical RC model of hydrogen fuel cell and supercapacitor,the mathematical model is established,and the parameters obtained through the working condition analysis form a set of hybrid energy system with dc/dc converter and DC motor.The matlab/simulink model is built.Based on this model,the fuzzy control algorithm is added to carry out the hybrid simulation and energy management strategy research,and the model design and software programming of hydrogen electric e VTOL hybrid power system are carried out.Finally,in order to verify the efficiency and performance of the energy management model of hydrogen electric e VTOL hybrid,as well as the effectiveness and feasibility of the fuzzy control strategy model,this paper designs the simulation model of the energy management system of hydrogen fuel cell and super capacitor hybrid based on the matlab/ADVISOR hybrid simulation platform,and simulates and verifies the energy management strategy of hydrogen electric e VTOL hybrid,The performance of the model is analyzed to meet the requirements of working conditions.