Method of determining the wind speed in the rotor plane of a wind turbine
AssigneeIfp Energies Nouvelles
InventorsEduardo Bezerra Rufino Ferreira Paiva, Hoai-Nam Nguyen, Olivier Lepreux
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method of determining the wind speed in the plane of a rotor (PR) of a wind turbine (1), by measuring (MES2) the rotational speed of the rotor, the angle of the blades and the generated power. The method according to the invention uses a wind turbine model (MOD) constructed from wind speed measurements (LID), and by use of measurement clustering (GRO) and regressions (REG).
Claims16
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 relates 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 at least one of the inclination angle of the blades of the wind turbine, the power generation of the conversion machine, torque of the wind turbine, and the orientation of a nacelle of the wind turbine dependent on the determined real time wind speed.
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.
Dependencies are inferred from the claim text.