Abstract:With the rapid development of the number of electric vehicles, the integration of large-scale electric vehicles has also brought peak shaving pressure to the power grid. V2G technology, by treating electric vehicles as movable energy storage devices, achieves bidirectional interaction with the power grid, which is of great significance for promoting the consumption of renewable energy、improving the regulation capacity of the power grid and building a new type of power system. This article proposes a transaction model for aggregators to participate in V2G and constructs a three-level collaborative interaction system of Grid-Aggregator-Users based on operational characteristics. The supporting technologies are introduced required to V2G. Considering the charging and discharging characteristics of electric vehicles and grid constraints, a real-time response optimization model for intraday aggregators is established for the scheduling strategy of electric vehicles. Taking the electric vehicle aggregator in residential areas as an example, the charging and discharging situation of electric vehicles during a day is simulated, and the load rates before and after V2G are compared. The results show that V2G can reduce the peak load rate and increase the discharge revenue of aggregators.