System and method for controlling a speed of a wind turbine

A system for controlling a wind turbine, the system comprising:

• at least one sensor mounted to a drivetrain of the wind turbine;
• at least one rate gyroscope mounted to the drivetrain of the wind turbine;
• and
• a control system comprising at least one processor configured to perform a plurality of operations, the plurality of operations comprising:
• receiving at least one speed measurement from the at least one sensor on the drivetrain of the wind turbine;
• receiving at least one rate gyroscope speed measurement from the at least one rate gyroscope on the drivetrain of the wind turbine;
• calculating an offset for the at least one rate gyroscope speed measurement as a function of the at least one speed measurement;
• adjusting the at least one rate gyroscope speed measurement by the offset;
• and
• implementing, via the control system, a control action for the wind turbine based on the adjusted at least one rate gyroscope speed measurement.