Wind and Structures

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Layout optimization for multi-platform offshore wind farm composed of spar-type floating wind turbines

  • Choi, E.H. (School of Mechanical Engineering, Pusan National University) ;
  • Cho, J.R. (School of Mechanical Engineering, Pusan National University) ;
  • Lim, O.K. (School of Mechanical Engineering, Pusan National University)
  • Received : 2014.10.18
  • Accepted : 2015.04.06
  • Published : 2015.06.25
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Abstract

A multi-platform offshore wind farm is receiving the worldwide attention for the sake of maximizing the wind power capacity and the dynamic stability at sea. But, its wind power efficiency is inherently affected by the interference of wake disturbed by the rotating blades, so its layout should be appropriately designed to minimize such wake interference. In this context, the purpose of this paper is to introduce a layout optimization for multi-platform offshore wind farm consisted of 2.5MW spar-type floating wind turbines. The layout is characterized by the arrangement type of wind turbines, the spacing between wind turbines and the orientation of wind farm to the wind direction, but the current study is concerned with the spacing for a square-type wind farm oriented with the specific angle. The design variable and the objective function are defined by the platform length and the total material volume of the wind farm. The maximum torque loss and overlapping section area are taken as the constraints, and their meta-models expressed in terms of the design variable are approximated using the existing experimental data and the geometry interpretation of wake flow.

Keywords

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