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Methodology to calculate the installation costs of offshore wind farms located in deep waters

Castro-Santos, Laura, Filgueira-Vizoso, Almudena, Lamas-Galdo, Isabel, Carral-Couce, Luis
Journal of cleaner production 2018 v.170 pp. 1124-1135
renewable energy sources, wind farms, wind turbines
This paper develops a methodology to determine the installation costs of a floating wind farm installed offshore, the value of which depends on the type of floating offshore wind platform installed. In this context, several costs in the installation process have been defined: installation of the offshore wind generators, installation of the floating offshore wind substructures, installation of the anchoring and mooring, installation of the electric systems and the commissioning or start up of the floating offshore wind farm. Furthermore, several installation scenarios have been taken into consideration regarding the shipyard surface and draught, the number of lifts, the transport, the mooring strategy and the substation configuration. The method, tested for the region of Galicia and for three sorts of floating substructures: spar, semisubmersible and tensioned leg, allows to compare different alternatives of installing a floating offshore and the most important aspects of the costs proposed. It can be useful for investors who decide to use this type of offshore renewable energy in the future.