Coordination of Different Agents in a Microgrid Using DC-Bus Signaling

The DC-Bus Signaling (DBS) is a proven method to coordinate different agents in a microgrid, using the DC-voltage of the microgrid as a communication signal. The droop control applied in a dc-microgrid leads to an error in the voltage regulation of the microgrid, while the power sharing among converters in such microgrid is achieved. By using the voltage at each node of the grid as the DBS signal, the behavior of the different agents in a microgrid can be managed. In this paper the DBS technique is used to coordinate conventional generators, Energy Storage Systems and loads in a microgrid. The control laws proposed are tested in an experimental microgrid.