Pole-to-ground fault protection strategy for HVDC grids under symmetrical monopolar configuration

Symmetrical monopolar is nowadays one of the most common architecture employed in HVDC point-to-point interconnectors using Modular Multilevel Converter (MMC) technology. Future HVDC grids built in a stepwise approach, starting from the connection of the existing and future symmetric monopolar HVDC links, are therefore a possibility that can be taken into account. In such symmetrical monopolar configuration, a pole-to-ground fault in a DC link...