System and method for controlling a wind turbine based on an estimated rotor azimuth

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

• a first sensor communicatively coupled to a drivetrain of the wind turbine;
• a second sensor mounted within a nacelle of the wind turbine, the second sensor further being mounted with a reset plate that is secured to the drivetrain;
• and
• a control system, the control system configured to:
• receive at least one speed condition of the drivetrain from the first sensor;
• receive a pulse from the second sensor, the pulse being generated when the drivetrain shifts to a known angle, wherein, when the drivetrain shifts to the known angle, the second sensor detects the reset plate and registers the pulse to detect revolutions of a rotatable hub of the wind turbine;
• estimate an azimuth of a designated rotor blade based on a combination of the at least one speed condition of the drivetrain and the pulse by snapping the azimuth to the known angle when the pulse is generated corresponding to the reset plate being passed;
• and
• implement, via the control system, a control action for the wind turbine based on the estimated azimuth.