Fuse-based protection system in a DC-microgrid for fast-charging applications: sizing and implications

DC microgrids are more and more used for specific application where loads to be supplied are in DC. This shift requires to perform ad hoc modelling regarding electrical aspects, particularly in terms of protection system. This is a critical subject in DC distribution, especially if the microgrid is intended to supply high-demanding load (for instance electric vehicle in fast-charging) at a high voltage level. The case study presented in this paper is a DC-microgrid - the eStation developed by Free2move eSolutions - for fast-charging applications. The proposed paper deals with the sizing process and the implications of a fuse-based protection system in a DC microgrid whose Battery Energy Storage System (BESS) is directly connected to the DC bus, without a converter interfacing them.