An HVDC Current Flow Controller for Multi-Terminal Grids

This paper proposes a modular and scalable current flow controller (CFC) for meshed High Voltage Direct Current (HVDC) grids, which is especially suitable for medium CFC voltage ratings. The exchange of active power is performed directly between two DC branches and the circuit can be installed directly at a DC node without any additional AC grid. Furthermore, a comparison of different CFCs is performed, which all allow an interline power exchange but are designed for different CFC voltage ratings.