System and method for preventing voltage collapse of wind turbine power systems connected to a power grid

A system for preventing voltage collapse of a wind turbine power system connected to a power grid, the system comprising:

• one or more sensors for monitoring at least one power value and at least one voltage value from a point of common coupling of the wind turbine power system;
• a controller communicatively coupled to the one or more sensors, the controller configured to perform one or more operations, the one or more operations comprising:
• determining a limit cycle reference point of the wind turbine power system as a function of a cross product of the at least one power value and at least one voltage value, the limit cycle reference point representative of a proximity of the at least one power value and the at least one voltage value to an operational point at which voltage collapse occurs, wherein the voltage collapse occurs when the wind turbine power system serves a load that has a higher reactive power demand than the wind turbine power system can supply;
• comparing the limit cycle reference point to at least one threshold;
• if the limit cycle reference point is greater than the at least one threshold, determining a delta value for at least one command of the wind turbine power system;
• determining at least one updated command based on the delta value and the at least one command;
• and,
• operating the wind turbine power system based on the at least one updated command.