Design And Optimization On Power Supply System Of Distributed Electric Vehicle

Along with the continuous improvement of people’s quality of life, the automotiveindustry has been rapidly developed and the number of cars is increasing sharply. Thedevelopment of the automobile industry not only greatly improved our standard of living,but also brought a severe energy crisis and environmental pollution problems. The use ofnew renewable energy wind and photovoltaic hybrid powered electric vehicles can solvethese two problems at the same time. Therefore, it has gradually become the focus of thecountries in the development of the automobile industry.Based on wind and solar energy in Tangshan, ecotect is used to take numericalsimulation to get different directions of solar radiation, and we find when the azimuthangle is SE9.8°and the angle of inclination is29.7°, the received radiation is the largestthroughout the year (about1.61×10~3kWh/m~2totals). The wind and solar energy resourcesof Tangshan City are analyzed, using MATLAB programming iterative calculationdetermine the capacity and the total system cost of each part of the system and realize theoptimize design of the system. Power output characteristics of the wind turbinecharacteristics and components of PV cells are analyzed to determine the MPPT methodwith variable step size perturbation and observation method as wind and solar powergeneration systems. Charge and discharge characteristics of the lithium iron phosphatestorage battery, the battery charging method of the lithium iron phosphate storage batteryis determined as a joint charging control method and the discharge of the batteryprotection is proposed. Based on the theory of hybrid energy systems a system’s energymanagement strategy is proposed in order to power balance as a starting point.To study and put forward for used electric vehicle power battery as energy storagebatteries, has realized the cascade utilization of electric vehicle power battery, not onlysaves the system energy, improve the energy efficiency of the system, but also reduce thecost of the system.