Background: With the increase of Electric Vehicle (EV), their disordered charging behaviour
will put great pressure on the stable operation of the distribution network.
Method: In order to study the charging and discharging optimization scheme of EVs, firstly the EV
charging and discharging load model is founded based on the Vehicle-to-Grid (V2G) technology.
Result: According to the electricity price mechanism of Shanxi Province, the paper proposes a multi-
target charging and discharging optimization for EVs based on the evolution of EV State Of
Charge (SOC) using the Modified Particle Swarm Optimization (MPSO).
Conclusion: Compared with the disordered charging mode, the method proposed in this paper can
simultaneously reduce the network loss of the distribution network and the cost of EV users.