Floating offshore wind turbines allow wind energy to be harvested in deep waters. However, additional dynamics and structural loads may result when the floating platform is being excited by wind and waves. In this work, the conventional wind turbine controller is complemented with a novel linear feedforward controller based on wave measurements. The objective of the feedforward controller is to attenuate rotor speed variations caused by wave forcing. To design this controller, a linear model is developed that describes the system response to incident waves. The performance of the feedback-feedforward controller is assessed by a high-fidelity numerical tool using the DTU 10MW turbine and the INNWIND.EU TripleSpar platform as references. Simulations in the presence of irregular waves and turbulent wind show that the feedforward controller effectively compensates the wave-induced rotor oscillations. The novel controller is able to reduce the rotor speed variance by 26%. As a result, the remaining rotor speed variance is only 4% higher compared to operation in still water.

中文翻译：

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浮动式海上风力发电机波浪扰动抑制的前馈控制

漂浮的海上风力涡轮机允许在深水中收集风能。然而，当浮动平台受到风和波浪的激励时，可能会产生额外的动力和结构载荷。在这项工作中，传统的风力涡轮机控制器与基于波浪测量的新型线性前馈控制器相辅相成。前馈控制器的目标是衰减由波浪强迫引起的转子速度变化。为了设计这个控制器，开发了一个线性模型来描述系统对入射波的响应。反馈前馈控制器的性能通过使用 DTU 10MW 涡轮机和 INNWIND.EU TripleSpar 平台作为参考的高保真数值工具进行评估。在存在不规则波浪和湍流风的情况下的模拟表明，前馈控制器有效地补偿了波浪引起的转子振荡。新型控制器能够将转子速度变化降低 26%。因此，与在静水中运行相比，剩余的转子速度变化仅高出 4%。