Massive off-shore wind integration in the European power system, the necessity to increase the power flows between asynchronous areas and inside continental Europe, call for HVDC transmission development, and multi-terminal-HVDC-based transmission. HVDC technology is highly controllable, but also sensitive to faults and degraded modes. Achieving an efficient and robust AC/DC transmission system requires to develop a vision of HVDC role and functionalities in different situations. In addition to HVDC converter core control functions and DC grid protection strategies, a coordinated DC grid control layer is beneficial to supervise control modes towards overall AC/DC transmission system security and stability, as well as to ensure converter controls interoperability. This paper offers a vision of what a robust AC / DC network can be, based on control and protection strategies that can be implemented via HVDC converter capabilities.
B. Luscan, S. Bacha, A. Benchaib, A. Bertinato, L. Chedot, JC. Gonzalez-Torres, S. Poullain, M. Romero-Rodríguez, K. Shinoda
Published in IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS