The Application of Electric Vehicles as Mobile Distributed Energy Storage Units in Smart Grid

In this paper, the development background of electric vehicles and the research status of V2G technology are analyzed, the functions realized in the grid by electric vehicles as mobile distributed energy storage units are set forth, and the economic and technical advantages of which are pointed out. Based on this, analysis to the configuration of a system wherein electric vehicles are connected to the smart grid as mobile distributed energy storage units and the functional configuration of respective modules is made. Finally, for the application of electric vehicles as mobile distributed energy storage units in the smart grid, some key problems, such as available capacity prediction problems, connecting capacity problems when connected to a distribution network and the protection and control problems when connected to the smart grid and so on are analyzed and discussed.