Research on system framework of plug-in electric vehicles integrated into electric power system

GONG Chang-wu， ZHANG You-bing， WENG Guo-qing
（College of Information Engineering， Zhejiang University of Technology， Hangzhou 310023， China）

Abstract： In order to solve the problems of energy supply shortages brought by the popularization of electric vehicles（EVs）and impacts on electric power system integration，the vehicle-to-grid（V2G）technology was applied to the smart grid. Firstly，the concept and state-of-the-art research of V2G were reviewed briefly. Then，several models for EVs connected with the grid realized in China were discussed. Meanwhile，a framework that EVs integrated into the grid through the microgrids under the environment of Chinese future smart grid was proposed. All the players involved in both these processes，as well as their activities，were described from two different domains：the grid technical operation and the electricity markets economic. Finally，the key technology and technical direction to be researched were pointed out. The results indicate that，the V2G technology and its system framework can make full use of the vehicle's energy storage system to have a two-way interaction with the grid，support the large sized application of renewable energy，improve the efficiency and stability of power system，and have certain practical significance for speeding up the adoption of EVs.
Key words： plug-in electric vehicles（EVs）；multi-microgrids；vehicle-to-grid（V2G）；renewable energy sources；smart grid