Vehicle-Grid cooperation control based on multi-state coupled power flow model

Abstract

Electrification constitutes one of the viable approaches to achieving sustainable development in road freight transportation. Firstly, addressing the lack of systematic technical details and control strategy in existing studies on eHighway and electric road system, this paper proposes the technical framework and develops the power flow model of online DC-driven system. Subsequently, in view of the complex coupling between the system operating states, it is found that the sudden change of the vehicle driving states is easy to cause the instability of grid power supply. Then, in order to enhance the system operating security and efficiency, the vehicle-grid cooperation controller utilizes the hierarchical control principles to decouple the platoon driving states and the grid power supply states. The upper controller implements longitudinal platoon cooperation, while the lower controller executes the grid-battery hybrid power management. Finally, simulation results show that the upper controller can rapidly realize the platoon’s velocity following and headway maintenance, while the lower controller can effectively realize the reasonable power distribution of the grid and battery, and keep the stability of grid power supply.