Optimal Charging/Discharging Control for Electric Vehicles Considering Power System Constraints and Operation Costs

With the popularization of electric vehicles (EVs), the influence on power systems is receiving increasing attention. According to statistics, EVs are in a parking state for more than 90% of the time, thus, the electric energy of the EVs accumulated by aggregators can be used to support the operation of power systems. This paper takes reducing operation costs as the objective function and considers the constraints of EVs and power systems to establish the optimal charging/discharging control of electric vehicles, which meet the operational safety of power systems and convenient driving. The influence on operation costs, peak load, and loss for the proposed charging/discharging two-way control, charging-only control, and free charging modes of EVs are compared. The influence of battery charging and discharging efficiency on these results is also discussed in this paper.