Control and fault analysis of multiport converters for low voltage DC distribution systems

The recent evolution of distribution systems has shed light on innovative solutions aimed at enhancing the performance such systems. In this paper, authors focus their attention two modular, non-isolated multiport DC/DC converters and application to low voltage DC first topology is based a capacitive internal link, while second one less usual inductive link. Unconventional control strategies lower-level pseudo-sliding mode algorithm higher-level inverse dynamics are proposed for both topologies by means general, fully modular design. A six-port discussed in detail its operation analyzed steady state, under abrupt load/generation changes case pole-to-pole faults. Finally, systematic comparison between performed.