Preprints
https://doi.org/10.5194/wes-2022-1
https://doi.org/10.5194/wes-2022-1
 
18 Jan 2022
18 Jan 2022
Status: a revised version of this preprint was accepted for the journal WES and is expected to appear here in due course.

Impacts of wind field characteristics and non-steady deterministic wind events on time varying main-bearing loads

Edward Hart1, Adam Stock1, George Elderfield1, Robin Elliott2, James Brasseur3, Jonathan Keller4, Yi Guo4, and Wooyong Song5 Edward Hart et al.
  • 1Wind Energy and Control Centre, Department of Electronic and Electrical Engineering, The University of Strathclyde, Glasgow, UK
  • 2Onyx Insight, Nottingham, UK
  • 3University of Colorado, Boulder, United States
  • 4National Renewable Energy Laboratory, United States
  • 5ORE Catapult, Inovo, Glasgow, UK

Abstract. This work considers the characteristics and drivers of the loads experienced by wind turbine main-bearings. Simplified load response models of two different hub and main-bearing configurations are presented, representative of both inverting direct-drive and four-point mounted geared drivetrains. The influences of deterministic wind field characteristics, such as wind speed, shear, yaw offset and veer, on the bearing load patterns are then investigated for similarity scaled 5, 7.5 and 10 MW reference wind turbine models. Main-bearing load response in cases of deterministic gusts and extreme changes in wind direction are also considered for the 5 MW model. Perhaps surprisingly, veer is identified as an important driver of main-bearing load fluctuations. Upscaling results indicate that similar behaviour holds as turbines become larger, but with mean loads and load fluctuation levels increasing at least cubically with the turbine rotor radius. Strong links between turbine control and main-bearing load response are also observed.

Edward Hart et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2022-1', Anonymous Referee #1, 27 Jan 2022
    • AC1: 'Reply on RC1', Edward Hart, 29 Mar 2022
  • RC2: 'Comment on wes-2022-1', Anonymous Referee #2, 16 Feb 2022
    • AC2: 'Reply on RC2', Edward Hart, 29 Mar 2022
  • AC3: 'Response to Editor', Edward Hart, 29 Mar 2022

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2022-1', Anonymous Referee #1, 27 Jan 2022
    • AC1: 'Reply on RC1', Edward Hart, 29 Mar 2022
  • RC2: 'Comment on wes-2022-1', Anonymous Referee #2, 16 Feb 2022
    • AC2: 'Reply on RC2', Edward Hart, 29 Mar 2022
  • AC3: 'Response to Editor', Edward Hart, 29 Mar 2022

Edward Hart et al.

Edward Hart et al.

Viewed

Total article views: 471 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
343 115 13 471 2 3
  • HTML: 343
  • PDF: 115
  • XML: 13
  • Total: 471
  • BibTeX: 2
  • EndNote: 3
Views and downloads (calculated since 18 Jan 2022)
Cumulative views and downloads (calculated since 18 Jan 2022)

Viewed (geographical distribution)

Total article views: 446 (including HTML, PDF, and XML) Thereof 446 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 20 May 2022
Download
Short summary
We consider characteristics and drivers of loads experienced by wind turbine main-bearings using simplified models of hub and main-bearing configurations. Influences of deterministic wind characteristics are investigated for 5, 7.5 and 10 MW turbine models. Load response to gusts and wind direction changes are also considered. Cubic load scaling is observed, veer is identified as an important driver of load fluctuations and strong links between control and main-bearing load response are shown.