Over the last few decades, there has been a renewed interest in the offshore wind sector. In particular, floating wind turbines represent the next frontier in the wind power industry. Currently, only research prototypes exist, and few studies are available on their possible investment cost. Therefore, a cost assessment for this technology is necessary to ascertain whether it is economically sustainable. This paper develops a life cycle cost model for floating offshore wind farms, bringing together the most up-to-date data and parametric equations from databases and literature. The cost model considers the key parameters of the wind power economy, namely CAPEX, OPEX, DECEX and LCOE. The proposed model should be helpful for future decision-making, as the wind energy industry is in constant evolution. An application to an offshore floating wind farms is also carried out, in which the three main types of floaters are considered, namely the Semi-Submersible Platform, the Spar Buoy and the Tension Leg Platform. An average LCOE of 9.74 $€\mathrm{c}/\mathrm{kWh}$ was found, at the lower bound of the typical range applying to fixed base offshore wind farms, and higher than typical values applying to onshore wind farms.

在过去的几十年中，人们对海上风电领域重新产生了兴趣。特别是，浮动式风力涡轮机代表了风力发电行业的下一个前沿领域。当前，仅存在研究原型，并且很少有关于其可能的投资成本的研究。因此，有必要对此技术进行成本评估以确定其在经济上是否可持续。本文针对浮动海上风电场开发了生命周期成本模型，将数据库和文献中的最新数据和参数方程式汇总在一起。成本模型考虑了风力发电经济性的关键参数，即CAPEX，OPEX，DECEX和LCOE。由于风能行业正在不断发展，因此所提出的模型应有助于未来的决策。还对海上浮动风电场进行了应用，其中考虑了三种主要类型的浮子，即半潜式平台，Spar浮标和张力腿平台。平均LCOE为9.74 $\mathrm{欧元}\mathrm{C}/\mathrm{千瓦时}$ 发现，该值位于适用于固定基础海上风电场的典型范围的下限，而高于适用于陆上风电场的典型范围的上限。