Topology Evolution Modeling and Analysis of Distribution Network under V2G Mode

Aiming at the interaction between the distribution network and electric vehicles(EVs) during the charge-discharge process, based on the complex network theory, the dynamic evolution model of distribution network under Vehicle-to-Grid(V2G) mode is proposed, which can analyze the relationship between the distribution network topological statistical and electrical characteristics. Considering both the distance and access number of charge stations, EV chooses the optimum charge station, then the access mode of EV in the distribution network is obtained. The model is used to study the impact of the spatial-temporal distribution of EV load on the two distribution network characteristics under three charge-discharge modes. Simulation results show that this method can reflect the interactive evolution process between the distribution network and EVs. The consistency between the distribution network topological statistical and electrical characteristics during peak-valley period is verified by comparative analysis. The method provides a theoretical basis for studying the charge-discharge strategy of EVs based on network topological statistical characteristics.