Vehicle to grid bidirectional energy transfer: Grid synchronization using Hysteresis Current Control

This paper presents the configuration for the bidirectional energy transfer between the vehicle and grid enabling the vehicle to grid technology. Electric vehicles can be used as a substitute for meeting the grid's energy demand by extracting power during off peak time and delivering power back to the grid at peak demand time. During Vehicle-to-Grid mode, the stored energy in the battery can be given back to the grid and during Grid-to-Vehicle mode, the grid supply is used to charge the battery. A 1-Φ bidirectional AC to DC converter and DC to DC converter is used for the electrical power transfer across the electric vehicle and the grid targeting Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) technologies. Grid's AC supply is rectified to a DC supply with the help of a bidirectional AC to DC power converter. A bidirectional DC to DC buck-or-boost converter is used to implement the charging and discharging of the electric vehicle's battery. Grid synchronization is done using the Hysteresis Current Control method. The topology is verified through MATLAB Simulink simulation.