Wind turbine control and monitoring method using a wind speed estimation based on a lidar sensor

A method for controlling and/or monitoring a wind turbine equipped with a LIDAR sensor performing a measurement relative to the wind at a point located upstream from the wind turbine, comprising:

• a) acquiring a signal corresponding to the measurement by the LIDAR sensor;
• b) constructing an estimator of the wind at the rotor of the turbine using a representation of the wind, a model of the LIDAR sensor and a wind propagation model, the estimator of the wind at the rotor relating the sensor signal to the wind speed at the rotor;
• c) estimating the wind speed at the rotor of the turbine by applying the estimator of the wind at the rotor to the acquired signal;
• and
• d) controlling and/or monitoring the wind turbine by the estimated wind speed.

An offshore wind turbine equipped with a LIDAR sensor whose measuring point is located upstream from the turbine, wherein the wind turbine comprises a control implementing a wind turbine control method comprising:

• a) acquiring a signal corresponding to the measurement by the LIDAR sensor;
• b) constructing an estimator of the wind at the rotor of the turbine using a representation of the wind, a model of the LIDAR sensor and a wind propagation model, the estimator of the wind at the rotor relating the sensor signal to the wind speed at the rotor;
• c) estimating the wind speed at the rotor of the turbine by applying the estimator of the wind at the rotor to the acquired signal;
• and
• d) controlling and/or monitoring the wind turbine by the estimated wind speed.