부산대학교 도서관

Electric vehicles (EVs) have been vigorously promoted in recent years. As flexible and controllable dispatch units, they can handle the problem of power imbalance in power grid caused by the integration of large-scale renewable energy (RE). In this paper, two scenario-based decentralized algorithms are proposed, one considers only charging, and the other considers both charging and discharging. First, the goal of minimizing the system power imbalance is described as a convex optimization problem with the constraints of the charging requirements of customers and the physical characteristics of EVs. Second, the coordinated charging algorithm of EVs is designed by using the principle of water filling. Third, the coordinated scheduling of EVs charging and discharging is further investigated, and the charging period and discharging period are separated according to the shape of power imbalance curve, which greatly reduces the complexity of the problem. Finally, numerical simulations are provided for demonstrating the effectiveness of the proposed algorithms.