A bidirectional AC-DC and DC-DC converter is proposed for DC distribution systems with high frequency isolation and bidirectional power flow capability. The
topology is based on a non-isolated bidirectional AC-DC converter for grid-connected operation and an isolated bidirectional DC-DC converter to interface between DC bus and DC link of the rectifier. The proposed converter has the ability to not only transfer energy from the grid to the vehicle, but also transfer energy from the vehicle to the grid (V2G). So, this converter can be used as a power backup for the grid. This converter allows fast control and high power density and requires proper controlling method for the switches which is implemented via programming. The prototype model of the bidirectional charger topology can be used for the hybrid electric vehicle applications and they provide a flexible power processing interface between an energy storage device and the rest of the system.
S. Surendran and Sruthy, V., “An Isolated Bi-Directional Converter with Improved Power Conversion Efficiency for DC Distribution Systems”, in Proceedings of National Conference on Technological Advancements in Power and Energy, 2013.