05 Feb 2024
 | 05 Feb 2024
Status: this preprint is currently under review for the journal WES.

Identification of electro-mechanical interactions in wind turbines

Fiona Dominique Lüdecke, Martin Schmid, and Po Wen Cheng

Abstract. Large direct drive wind turbines with a multi-megawatt power rating face design challenges due to scaling laws for high-torque generators. This work proposes to extend the design space by moving towards a more system-oriented approach. This requires an extension of the state-of-the-art wind turbine models with additional degrees of freedom to include electro-mechanical interactions. To limit the computational effort of such models, a profound understanding of possible interaction mechanisms is required. This work aims to identify interactions of an additional degree of freedom in the radial direction of the generator with the wind turbine structure, the aerodynamics and the wind turbine controller. Therefore, a Simpack model of the IEA 15MW RWT is implemented and coupled to a quasi-static analytical generator model for electromagnetic forces. The analytical model, sourced from literature, is code-to-code validated against a finite element model of the generator in Comsol Multiphysics. Electro-mechanical simulation results do not show interactions with the aerodynamics or the controller. However, interactions with the wind turbine structure occur. It is shown that the modelling approach can affect the system's natural frequencies, which can potentially impact the overall system design choices.

Fiona Dominique Lüdecke, Martin Schmid, and Po Wen Cheng

Status: open (until 18 Mar 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2024-13', Anonymous Referee #1, 16 Feb 2024 reply
Fiona Dominique Lüdecke, Martin Schmid, and Po Wen Cheng
Fiona Dominique Lüdecke, Martin Schmid, and Po Wen Cheng


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Short summary
Large direct drive wind turbines, with a multi-megawatt power rating, face design challenges. Moving towards a more system-oriented design approach could potentially reduce mass and costs. Exploiting the full design space, though, may invoke interaction mechanisms, which have been neglected in the past. Based on coupled simulations, this work derives a better understanding of the electro-mechanical interaction mechanisms and identifies potential for design relevance.