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Wind turbine Cpmax and drivetrain-losses estimation using Gaussian process machine learning

Hart, E and Leithead, W E and Feuchtwang, J (2018) Wind turbine Cpmax and drivetrain-losses estimation using Gaussian process machine learning. Journal of Physics: Conference Series, 1037. ISSN 1742-6588

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In this paper it is shown that measured data in a wind turbine, available to the controller, can be formulated into a polynomial regression problem in order to estimate the turbine's maximum efficiency power coefficient, Cpmax, and drivetrain losses, assuming the latter can be well approximated as being linear. Gaussian process (GP) machine learning is used for the regression problem. These formulations are tested on data generated using the Supergen Exemplar 5 MW wind turbine model, with results indicating that this is a potential low cost method for detecting changes in aerodynamic efficiency and drivetrain losses. The GP approach is benchmarked against standard least-squares (LS) regression, with the GP shown to be the superior method in this case.