Abstract: The full fault-blocking converter（FFBC）-based DC power distribution network is an important

direction of the power system with source-load-storage interaction. Since there is no DC breaker in FFBC-DC

power distribution network，the start-up，mode switching and fault handling control strategies of FFBC-DC power

distribution network are all highly dependent on the coordination of the connected source，load and storage，and

different with that in traditional DC distribution network. However，the most researches of FFBC-DC power

distribution network are mainly focused on the topology exploration and fault handling technology，resulting in the intuitive analysis on the operation control of FFBC-DC power distribution network is insufficient. In view of this，a four-terminal FFBC-DC power distribution network was taken as the case to analyze the operating characteristic.

The control strategies of the fully blocked DC distribution network oriented to the interaction of source，load and

storage in states of startup，steady state and fault were proposed，and the roles of source，load and storage in

different strategies were analyzed respectively. Based on the Matlab/Simulink model，the coordinated control of the whole FFBC-DC power distribution network was simulated so as to bring an intuitive understanding of FFBC-DC

power distribution network.

      Key words: source-load-storage interaction；DC power distribution network；full fault-blocking converter

（FFBC）；hybrid modular multilevel converter （MMC）；coordinated control