05 Oct 2023
 | 05 Oct 2023
Status: this preprint is currently under review for the journal WES.

A novel techno-economical layout optimization tool for floating wind farm design

Amalia Ida Hietanen, Thor Heine Snedker, Katherine Dykes, and Ilmas Bayati

Abstract. Over the past few years, the offshore wind sector has been subject to a renewed yet growing interest from the industry and from the research sphere, with a particular focus on a recently developed concept being the Floating Offshore Wind (FOW). Because of its novelty, floating research material is found in limited quantity. This paper focuses on the layout optimization of a Floating Offshore Wind Farm (FOWF) considering multiple parameters and engineering constraints, combining floating specific parameters together with economic indicators. Today’s common wind farm layout optimization codes do not take into account neither floating specific technical parameters (anchors, mooring lines, inter-array cables (IAC) etc.) nor non-technical parameters (OPEX, CAPEX, other techno-economic project parameters). In this paper, a multi-parametric objective function is used in the optimization of the layout of a FOWF, combining the AEP together with the costs that depend on the layout. The mooring system and the collection system including the inter-array cables and the offshore substation are identified as layout-dependent and therefore modelled in the optimization loop. Using ScotWind site 10 as a study case, it was found with the predefined technical and economic assumptions that the profit was increased by 34.5 m euros compared to a grid-based layout. The main drivers were identified to be the AEP, followed by the anchors and the availability associated to the failures of inter-array cables.

Amalia Ida Hietanen et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2023-132', Markus Jürgen Lerch, 26 Oct 2023
  • RC2: 'Comment on wes-2023-132', Anonymous Referee #2, 24 Nov 2023

Amalia Ida Hietanen et al.

Amalia Ida Hietanen et al.


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Short summary
In this research, the layout of a floating offshore wind farm was optimized to maximize the relative NPV. By modelling power generation, losses, inter-array cables, anchors, and operational costs, an increase of 34.5 million euros in relative NPV compared to grid-based layouts was achieved. A sensitivity analysis was conducted to examine the impact of economic factors, providing valuable insights. This study contributes to enhancing the efficiency and cost-effectiveness of floating wind farms.