Based On Matlab/Simulink’s Simulation Of Solar Charging System

Along with the problems of environment pollution caused by energy consumption and traditional fuel vehicle emissions, electric vehicles have gradually become a trend of the automotive industry nowadays due to its good features of energy saving and environmental protection. However, since the related infrastructure of electric vehicle falls behind, electric vehicles develop relatively slow. In the face of this, many countries make policies for developing infrastructure construction and particularly invest much capital in building charging stations. There are two cases in charging station construction. One is supplying the charging stations with electric energy provided by the grid, however, for the already saturated grid, this approach has a bad impact on the normal operation of the grid. Besides, electricity grid is often generated by thermal power, which is not a good solution to the environment and resource problems. The second approach is creating independent photovoltaic charging stations, which means electricity power is provided to the station by solar panels. This construction method is gradually being advocated by nations and enterprises because it does not affect the normal operation of grid and at the same time it saves energy. However, due to the high price of solar panels and batteries as well as other issues, the solar charging station is still in the research stage, having not completely entered the market so as to invest and operate.This thesis evaluates the feasibility of solar charging stations by setting up independent photovoltaic charging system simulation platform. The main simulation modules include: environment module, solar panel module, DC to DC converter module, DC to AC converter module, maximum power tracking module, charge control module, battery module and load module. As the system input, the environment module is mainly consist of two parts:radiation intensity and solar panel operating temperature. Solar panel has different output power under different conditions. Maximum power tracking module improves the operating efficiency of solar panel by maximizing the solar panel power output. The aim of introducing battery module is to make sure that when solar panel cannot provide sufficient electric power to the load, the battery provides electric power to maintain the normal operation of entire system. In this thesis, based on the Matlab/Simulink platform, a simulation platform of various modules within the entire solar charging station system is established for researching dynamic characteristics of Shenyang’s weather. The simulation results can well indicate the solar panel’s electric energy production in a day under the established load power needs, as well as the working condition and related data of the charging station modules, so that we can conduct the optimal selection of various modules and realize the goals of ultimately increasing the working efficiency of the charging station and cost-saving.