Solid-State Technologies for Flexible and Efficient Marine DC Microgrids
Seong‐Il Kim, Jakub Kucka, Gabriele Ulissi, Soo-Nam Kim, Dražen Dujić
Abstract
This paper presents flexible operating modes of marine DC microgrids and main advantages of employing energy storage systems into such DC microgrids. Scaled-down marine systems with two DC buses and integrated energy storages are considered in this paper. To verify superior features of the DC microgrids with solid-state technologies and energy storage systems, a wide range of system operating modes are experimentally demonstrated, ranging from basic to advanced operating modes: DC voltage regulation, power sharing control, soft start (smoothly charging bus potential to the nominal level), seamless transition (transiting open-bus and closed-bus operations), load leveling (flattening generator loads by energy storage systems), transient mitigation (mitigating sudden load changes by energy storage systems), and zero-emission (powering the marine networks by energy storage systems near a port). The experimental results show that DC microgrids with solid-state technologies and energy storage systems provide ship owners with the flexibility in energy management of the system, fuel savings, and environmental compliance in a port.