System and method for dynamically estimating inverter-based resource reactive power capability

A wind farm, comprising:

• a plurality of wind turbine generators;
• a plurality of turbine-level controllers for controlling the plurality of wind turbine generators;
• and,
• a farm-level controller commutatively coupled to the plurality of turbine-level controllers,
• wherein each of the turbine-level controllers perform a plurality of operations, the plurality of operations comprising:
• generating one or more command signals via a regulator of a respective wind turbine generator of the plurality of wind turbine generators of the wind farm;
• dynamically estimating a reactive power capability of the respective wind turbine generator based, at least in part, on a reactive power feedback signal, the one or more command signals, and upper and lower limits of the regulator, wherein the reactive power capability comprises a reactive power capability upper value and a reactive power capability lower value, and wherein if the one or more command signals equal the upper limit, then setting the reactive power capability upper value equal to the reactive power feedback signal and the reactive power capability lower value equal to a lower reactive power equipment rating for the at least one inverter-based resource;
• and,
• sending the reactive power capability to the farm-level controller, wherein the farm-level controller controls the wind farm based on the reactive power capability.