Patent ID: 11885305
Assignee: IFP ENERGIES NOUVELLES
Field: Measurement (Instruments)
Classification: CPC F  G  Y | IPC F  G

Claim 15:
16. A method of operating a wind turbine having a rotor with blades and a conversion machine by making measurements of a wind speed in a rotor plane of the wind turbine, rotational speed of the rotor, an inclination angle of the blades and a power generated by the conversion machine, the method comprising:
classifying the measurements of the wind speed in the rotor plane, the rotational speed of the rotor, the inclination angle of the blades and the power generated by the conversion machine into at least two classes of wind turbine operating conditions;
performing a regression of each of the at least two classes of the wind turbine operating conditions between the measurements of the wind speed in the rotor plane, the rotational speed of the rotor, the inclination angle of the blades and the power generated by the conversion machine by using a basis function decomposition method establishing a relationship between basis functions of the basis function decomposition method and the wind speed in the rotor plane by use of a Gaussian process regression method and a least-squares regression method;
constructing a model of the wind turbine using the regressions of each of the at least two classes of the wind turbine operating conditions which relate the rotational speed of the rotor, the inclination angle of the blades and the power generated by the conversion machine to the wind speed in the rotor plane;
measuring in real time the rotational speed of the rotor, the inclination angle of the blades and the power generated by the conversion machine of the wind turbine;
determining in real time the wind speed in the rotor plane by using the real time measurements of the rotational speed of the rotor, the inclination angle of the blades and the power generated by the conversion machine of the wind turbine and the model of the wind turbine; and
controlling the wind turbine to monitor and diagnose mechanical strain on structure of the wind turbine according to the determined real time wind speed in the rotor plane.