Journal cover Journal topic
Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
https://doi.org/10.5194/wes-2017-23
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research articles
20 Jun 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Wind Energy Science (WES).
Wind inflow observation from load harmonics
Marta Bertelè1, Carlo L. Bottasso1,2, Stefano Cacciola2, Fabiano Daher Adegas3, and Sara Delport3 1Wind Energy Institute, Technische Universität München, Garching bei München, D-85748 Germany
2Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Milano, I-20156 Italy
3GE Global Research, Garching bei München, D-85748 Germany
Abstract. The wind field leaves its fingerprint on the rotor response. This fact can be exploited to use the rotor as a sensor: by looking at the rotor response, in the present case in terms of blade loads, one may infer the wind characteristics. This paper describes a wind state observer that estimates four wind parameters, namely the vertical and horizontal shears and the yaw and upflow misalignment angles, from out-of-plane and in-plane blade bending moments. The resulting observer provides on-rotor wind inflow characteristics that can be exploited for wind turbine and wind farm control. The proposed formulation is evaluated by extensive numerical simulations in turbulent and non-turbulent wind conditions using a high-fidelity aeroservoelastic model of a multi-MW wind turbine.

Citation: Bertelè, M., Bottasso, C. L., Cacciola, S., Daher Adegas, F., and Delport, S.: Wind inflow observation from load harmonics, Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2017-23, in review, 2017.
Marta Bertelè et al.
Marta Bertelè et al.
Marta Bertelè et al.

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Short summary
The rotor of a wind turbine is used to determine some important parameters of the wind, including the direction of the wind vector relative to the rotor disk and horizontal and vertical shears. The method works by using measurements provided by existing on-board load sensors. The observed wind characteristics can be used for implementing advanced features in smart wind turbine and wind farm controllers.
The rotor of a wind turbine is used to determine some important parameters of the wind,...
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