Wind Energy Science
Wind Energy Science
WES
Articles | Volume 10, issue 8
Articles | Volume 10, issue 8
https://doi.org/10.5194/wes-10-1625-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/wes-10-1625-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 10, issue 8
Research article
 | 
14 Aug 2025
Research article |  | 14 Aug 2025

State-of-the-art efficiency determination of a wind turbine drivetrain on a nacelle test bench

Hongkun Zhang, Paula Weidinger, Christian Mester, Zihang Song, Marcel Heller, Alexander Dubowik, Bernd Tegtmeier, and Karin Eustorgi

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Latest update: 22 Oct 2025
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Short summary
Drivetrain efficiency is a wind turbine’s fundamental behaviour in the energy conversion. To determine the efficiency, input and output powers need to be measured with sufficient accuracy. However, this is a very challenging task due to high complexity and lack of properly calibrated torque measurements. In cooperation with the German and Swiss national metrology institutes, the efficiency determination with state-of-the-art instrumentations is demonstrated here with test processes and results.
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Electro-mechanical interactions in wind turbines
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