Research On Power Supply System Of Electric Vehicle Based On Pv Energy Storage Technology

With the increasing global energy consumption and environment pollution of the increasingly serious,energy conservation,ecological protection has become the biggest problem facing the world,the electric car is to achieve energy saving,green environmental protection of the best means of transport.Future with the rapid increase in the number of electric vehicles,the simple use of the traditional grid electric vehicle charging station construction mode has been unable to meet the theme of today's world,so consider based on photovoltaic energy storage technology and electric vehicle charging station combining construction mode has important significance.Firstly,the design structure of the electric vehicle energy storage technology and photovoltaic off grid charging station scheme based on the analysis of the module and model of bidirectional DC/DC converter for photovoltaic array module,retired battery energy storage scheme,developed based on light intensity of illumination system energy management strategy and operation mode.Secondly,the PV array maximum power point tracking using the incremental conductance method(MPPT),and the use of PI control to track the voltage;grid connected inverter as the distributed power grid interface,using PQ deformation control,control strategy from the voltage loop and current loop;the side bidirectional DC/DC converter dual control strategy the analysis of retired lithium battery energy storage.Then,to study the energy storage module retired lithium battery to use the perspective,first on the electrical characteristics of retired lithium batteries were analyzed,then to study the charge and discharge control method and double converter main circuit topology structure and working principle.Finally,build a battery and retired off-grid light storage charging station power supply system simulation model based on MATLAB/Simulink platform,the bidirectional DC/DC converter for energy storage system using a dual topology,the simulation results show that compared with the conventional single topological structure of the system response speed,short charging time,current small ripple and better stability.For the energy management strategy based on light intensity,simulation analysis of the stability between 4 modes of the system,at the same time to load the system in the grid and off stability network operation modes are simulated and analyzed,verified the feasibility of light duty storage charging station scheme,dual topology advantage,and from reasonable grid inverter control method.