Research on flexible medium-voltage DC distribution technology based shore-to-ship power supply system

The development of shore-to-ship power supply technology can effectively reduce port pollution and promote the construction of green port. This paper briefly introduces the technical scheme of the common used inverter for shore power, and then puts forward the technical scheme of multi-terminal medium-voltage DC (MVDC), according to the transmission characteristics of the shore-to-ship power supply. Considering the different demand of converters connected to the distribution network and the ship grid, the paper discusses the suitable converter schemes. Based on the current operation demand of the distribution network and the new energy development trend of ports and ships in future, advantages and disadvantages of the inverter technology and the multi-terminal MVDC technology are compared, which demonstrates the feasibility and superiority of the multi-terminal MVDC technology in shore-to-ship power supply applications.