Valley-Period Dispatched Strategy of Electric Vehicles in Charging Station

Electric vehicles (EVs) have been gradually known to the public because of their advantages of energy saving and environmental protection. However, its charging behavior is random in space and time, which has an impact on the quality of the power grid and its safe and economic operation. A valley-period dispatched charging model and strategy based on the particle swarm optimization (PSO) algorithm is proposed in this paper. It can make full use of each period of the valley-period to complete the charging of EVs, and reduce the peak-valley ratio of load profiles in the valley-period significantly. The Monte Carlo simulation is used to simulate the charging load profiles of EVs under different charging strategies. The results show that the proposed strategy can effectively optimize the charging load profiles of EVs in the valley-period.