Liu X., Luo X., Li W., Li S., Yu H., 2016, Coordinated Charging Optimization Strategy of Electric Vehicles, Chemical Engineering Transactions, 51, 1225-1230.
The large-scale uncoordinated charging threatens the safety operation of power grid. In the paper, two coordinated charging modes were proposed: automatic on-off charging mode and the smoothly adjusting charging mode. The 2 coordinated charging modes were established based on existing power distribution networks in residential areas and the constraint conditions of the distribution transformer and circuit capacity in order to transmit maximum electric power to electric vehicles. The established mode formulas were solved with stochastic simulation and modified particle swarm algorithm. Taking the charging station in one residential area in Shenzhen as an example, we performed the simulation of vehicle charging according to the uncoordinated charging mode and the 2 coordinated charging modes. We compared the voltage distribution in the three modes respectively. Based on the computation of the profit amount and the load volatility, we proposed the concept of cost saving so as to compensate for the expense of involved users. The simulation results showed that the two coordinated modes could raise user satisfaction and promote the smooth operation of power grid. Charging management system can choose one operation mode as required.
