Preprints
https://doi.org/10.5194/wes-2024-24
https://doi.org/10.5194/wes-2024-24
29 Apr 2024
 | 29 Apr 2024
Status: this preprint is currently under review for the journal WES.

Dynamic Modelling and Response of a Power Cable connected to a Floating Wind Turbine

David Robert Verelst, Rasmus Sode Lund, and Jean-Philippe Roques

Abstract. A power cable that connects a floating power plant to the grid is exposed to a dynamic environment that can pose challenging design conditions for the cable. This dynamic environment is caused by the movements of the floating substructure due to a combination of wind, wave and current forces. The power cable model needs to be able to account for its bending and axial stiffness, and hydrodynamic forcing. In this publication a catenary mooring/cable line element with bending stiffness is verified with a reference tool to assure the bending stiffness of a power cable is captured correctly. By using an existing parametric design model, a simple power cable design (in terms of overall cable length) is proposed for the IEA15MW turbine with UMaine floating substructure for a site with a water depth of 82 meter. A simple geometric method is proposed to initialize this complex lazy wave cable design in a dynamic and time domain simulation environment. The hydro-servo-aero-elastic wind turbine simulation environment HAWC2 is then used to establish an estimate of how much movements the combined system (turbine, floater, mooring lines, and power cable) experiences. This study discusses the necessary steps that are to be considered when including the dynamic power cable in the analysis and when adjusting a floating reference wind turbine design to a specific site with different water depth.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
David Robert Verelst, Rasmus Sode Lund, and Jean-Philippe Roques

Status: open (until 03 Jun 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2024-24', Anonymous Referee #1, 14 May 2024 reply
David Robert Verelst, Rasmus Sode Lund, and Jean-Philippe Roques

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Dynamic Modelling and Response of a Power Cable connected to a Floating Wind Turbine Rasmus S. Lund and David R. Verelst https://doi.org/10.11583/DTU.25577157

David Robert Verelst, Rasmus Sode Lund, and Jean-Philippe Roques

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Short summary
This study discusses key issues when performing simulations of a dynamic power cable that is connected to a floating wind turbine. Such simulations are an important tool to asses if the floater and cable motions cause the power cable to survive or fail specific conditions, and generally assure they can fulfil their intended design life. This work describes how to model such power cables and combine that with a fully coupled model of an operating floating wind turbine.
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