Cooperation between power systems and electric vehicles

In large-scale deployment of electric vehicles, their charging demands are concerned to cause load flow congestions of the power system, especially in the distribution feeder around residential area. There are many studies on charging demand analysis considering the power system bottlenecks and the smart charging schemes mitigating the impact on the power system. Flexible demand dispatch by the electric vehicle charging would be expected as candidate of fast demand response resources. The electric vehicles are also expected to be an aggregated mobile energy storage for integrating large-scale renewable energy sources into the power system. V2G control schemes, which are focusing on the ancillary services for the power system, are being implemented to the electric vehicle and charging infrastructure system targeting the smart grid strategy. This paper summarizes the technical subjects and perspectives on cooperation of the electric vehicles and the power system through the fundamental research achievements and the reviews of smart charging and V2G applications. © 2013 The Institute of Electrical Engineers of Japan.