A Communication-Free Master-Slave Microgrid with Power Sharing
For microgrid designers, this work offers a simpler, communication-free approach to power sharing and mode transitions, though it is an incremental improvement over existing master-slave architectures.
The paper proposes a master-slave microgrid design that achieves power sharing without communication and seamless transitions between islanded and grid-connected modes, using grid-supporting inverters synchronized to a synchronous generator.
In this paper a design of a master-slave microgrid consisting of grid-supporting current source inverters and a synchronous generator is proposed. The inverters are following the frequency of the grid imposed by the synchronous generator. Hence, the proposed structure of the microgrid is steadily synchronized. We show that the method achieves power sharing without the need of communication. Furthermore, no change in operation mode is needed during transitions of the microgrid between islanded and grid-connected modes.