Systems and methods for synchronization of inverters in a microgrid

A method comprising:

• monitoring, by a master inverter, a main grid and a microgrid to determine one or more electrical parameters for the main grid and the microgrid;
• detecting, by the master inverter, one or more predefined conditions related to a fault occurred in at least one of the microgrid and the main grid based, at least in part, on the one or more electrical parameters;
• generating, by the master inverter, a synchronization signal based on the one or more electrical parameters for the main grid and/or the microgrid in response to detection of the one or more predefined conditions, the synchronization signal comprising at least a voltage reference to be maintained at a microgrid bus to synchronize the plurality of microgrid inverters, the microgrid bus being a bus through which a plurality of microgrid inverters are connected to each other;
• and
• transmitting, by the master inverter, the synchronization signal to the plurality of microgrid inverters to adjust respective output electrical parameters, wherein the respective output electrical parameters are adjusted by each of the plurality of microgrid inverters to match a voltage at the microgrid bus with the voltage reference comprised in the synchronization signal, and wherein matching the voltage at the microgrid bus with the voltage reference facilitates synchronization of the plurality of microgrid inverters.

A system, comprising:

• a microgrid;
• a master inverter operatively connected to a main grid and a plurality of microgrid inverters of the microgrid, the master inverter configured, at least in part, to:
• monitor the main grid and the microgrid to determine one or more electrical parameters for the main grid and the microgrid;
• detect one or more predefined conditions related to a fault that occurred in at least one of the microgrid and the main grid based, at least in part, on the one or more electrical parameters;
• generate a synchronization signal based on the one or more electrical parameters for the main grid and/or the microgrid in response to detection of the one or more predefined conditions, the synchronization signal comprising at least a voltage reference to be maintained at a microgrid bus to synchronize the plurality of microgrid inverters, the microgrid bus being a bus through which the plurality of microgrid inverters are connected to each other;
• and
• transmit the synchronization signal to the plurality of microgrid inverters to adjust respective output electrical parameters, wherein the respective output electrical parameters are adjusted by each of the plurality of microgrid inverters to match a voltage at the microgrid bus with the voltage reference comprised in the synchronization signal, and wherein matching the voltage at the microgrid bus with the voltage reference facilitates synchronization of the plurality of microgrid inverters.