System and method for extending the operating speed threshold of a grid-forming inverter-based resource

A method of preventing grid frequency-induced trips of a grid-forming (GFM) inverter-based resource (IBR) connected to an electrical grid, the GFM IBR having a generator, the method comprising:

• determining, via a controller, a rate of change of a grid frequency of the electrical grid based on one or more grid frequency feedbacks;
• comparing, via the controller, the rate of change of the grid frequency to a predetermined threshold;
• and
• temporarily increasing, via the controller, a standard speed-related trip level of the GFM IBR to a modified trip level for a certain time period when the rate of change of the grid frequency is greater than the predetermined threshold indicative of a grid-induced power change,
• wherein, by temporarily increasing the standard speed-related trip level for the certain time period, the GFM IBR has enough time to recover from the grid-induced power change and resume normal operation.

A wind turbine power system connected to an electrical grid, comprising:

• a tower;
• a nacelle mounted atop the tower;
• a rotor comprising a rotatable hub with at least one rotor blade;
• and
• a controller for controlling the wind turbine power system, the controller comprising at least one processor, the at least one processor configured to perform a plurality of operations, the plurality of operations comprising:
• determining a rate of change of a grid frequency of the electrical grid based on one or more grid frequency feedbacks;
• comparing the rate of change of the grid frequency to a predetermined range indicative of a grid-induced power change of a certain amount;
• and
• temporarily reducing a standard speed-related trip level of the wind turbine power system to a modified trip level for a certain time period when the rate of change of the grid frequency is outside of the predetermined range,
• wherein, by temporarily reducing the standard speed-related trip level for the certain time period, the wind turbine power system has enough time to recover from the grid-induced power change and resume normal operation.