Reduced model of active-rectifier-based bi-directional charger for vehicle-to-grid

Abstract

The dramatic increase in the number of electric vehicles (EVs) on the roads may cause a negative impact on the grid, as charging their battery requires a huge amount of power. In such circumstances, Vehicle-to-Grid (V2G) becomes a promising solution that can regulate the energy flow between EVs' batteries and the power system to avoid overloading and enhance power quality. This paper proposes a bi-directional charging control system based on the reduced model of the active rectifier for V2G application. The proposed control system can exchange energy with the grid in V2G mode, limit the charging power in smart charging mode, and control the active and reactive power to the grid. All the controllers of the system are designed based on the average model using energetic macroscopic representation (EMR), hence, they can operate in a wide working range. The performance and functionality of the proposed charger are evaluated by numerically simulating a full charging cycle of the battery with various testing scenarios.