Grid-forming island detection and continuous operation of an inverter-based resource

A method for controlling an inverter-based resource connected to an electrical grid, the method comprising:

• operating the inverter-based resource in a normal mode of operation;
• receiving, via a controller, one or more electrical feedbacks and control signals;
• determining, via the controller, whether the one or more electrical feedbacks and control signals are indicative of an islanding condition occurring in the inverter-based resource;
• upon the one or more electrical feedbacks and control signals being indicative of the islanding condition, switching to an island mode of operation for the inverter-based resource, wherein the island mode of operation comprises:
• continuously monitoring the one or more electrical feedbacks and control signals;
• and
• continuing operation of the inverter-based resource in the island mode of operation for as long as the one or more electrical feedbacks and control signals indicate the islanding condition and an amount of loading is below at least one of available power or energy at the inverter-based resource;
• and
• reverting to the normal mode of operation when the one or more electrical feedbacks and control signals indicate that the electrical grid is restored.