Research And Design On Dynamic Distribution System Of Power In Electric Vehicle Charging Station

As the government strongly supports the electric vehicle industry and promotes the use of clean energy as the driving force of automobiles,and the frequency of people using electric vehicles is getting higher and higher,and the load of charging stations carrying electric vehicles is increasing.The current charging station uses the traditional power distribution strategy to solve the problem of reasonable unified charging of large-scale electric vehicles,and with the personalized charging requirements of users,higher requirements are also placed on the power allocation strategy of charging stations.In order to avoid the large-scale electric vehicle charging at the same time to increase the peak-to-valley difference of the grid and the self-loss of the grid system,to meet the diversified needs of users,design the dynamic power distribution system of the electric vehicle charging station,the main research contents are as follows:(1)A general layout structure of charging station with fast and slow charging double-carriage complementary structure is proposed.With the dynamic cost and user demand charging time as the objective function the new car is added to the charging station dynamic allocation algorithm and the charging station power update allocation algorithm is introduced.The incentive factor parameter provides different charging priorities for the user's charging demand and improves the charging efficiency of the charging station.Finally using Monte Carlo method to simulate and analyze on Matlab compared with the traditional power allocation strategy the dynamic power allocation strategy provides users with more economical and shorter charging time power allocation strategies under the user's personalized charging requirements.The user's charging demand is completed and the grid load curve has the effect of cutting peaks and filling the valley showing a broad application prospect and achieving the intended purpose of the research.(2)Design the hardware structure diagram of the dynamic power distribution system including the human-computer interaction platform and the centralized controller(server or PC).The human-computer interaction platform uses STM32 as the core controller and uses the modular idea to design the liquid crystal display circuit and transaction.The settlement circuit the SOC margin detection circuit the communication network circuit the working power supply circuit etc.and the anti-interference measures such as electrical isolation and filter circuit are added.Realized power detection online payment data communication and other functions.The centralized controller acquires the charging demand information of the human-computer interaction platform through the CAN bus and combines the remaining charging power of the charging station to generate a user charging scheme according to the dynamic power allocation strategy.The highly reliable CAN bus provides a guarantee for the stability of the entire system communication.(3)Using C language to write human-computer interaction software program in Keil compilation environment including main control program user information reading program SOC margin acquisition program charging scheme uploading program transaction settlement program CAN communication program.For the user's operation interface the MEMS-based Android system WAR-070 series is adopted.The simple and easy-to-operate man-machine interface provides convenience for users to set the charging scheme and enhances the user experience.