Diagram DynaGET double fed-induction generator concept Copyright: © CWD


Alexander Krause © Copyright: CWD


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Improved design of wind turbine gearboxes by considering transient loads from different drive train concepts

Wind turbines (WTGs) are not only loaded by the wind and the loads caused by it, but also by transient events from the electrical grid. These events are, for example, a low voltage ride through. The resulting loads are currently insufficiently considered in the design of WT gearboxes.

To determine these highly dynamic loads, the 2.75 MW research nacelle at the Center for Wind Power Drives is equipped with different electrical drive train concepts and subsequently loaded with transient events from the grid. These different drive train concepts are, on the one hand, the full converter concept in which the entire power of the generator is transmitted to the electrical grid via the converter. On the other hand, with the double fed induction generator (DFIG) concept, only a small part of the power is fed into the grid via a converter, allowing a smaller converter to be used which saves money.

By directly comparing the two drive train concepts, it will be possible to better determine the loads from transient events and to incorporate them into the design of WTG transmissions.


01-10-2019 – 30.09.2022

Project partners:

  • Center for Wind Power Drives at the RWTH Aachen University
  • Institute of Automatic Control of the RWTH Aachen University
  • Laboratory for Machine Tools and Production Engineering of the RWTH Aachen University
  • E.ON Energy Research Center at the RWTH Aachen University
  • Institute for Aerodynamics of the RWTH Aachen University


Associated project partners:

Siemens AG Winergy Group

Project funded by:

European Regional Development Fund