The cost of offshore wind energy can be reduced by incorporating control strategies to reduce the support structures' load effects into the structural design process. While effective in reducing the cost of support structures, load‐reducing controls produce potentially costly side effects in other wind turbine components and subsystems. This paper proposes a methodology to mitigate these side effects at the wind farm level. The interaction between the foundation and the surrounding soil is a major source of uncertainty in estimating the safety margins of support structures. The safety margins are generally closely correlated with the modal properties (natural frequencies, damping ratios). This admits the possibility of using modal identification techniques to reassess the structural safety after installing and commissioning the wind farm. Since design standards require conservative design margins, the post‐installation safety assessment is likely to reveal better than expected structural safety performance. Thus, if load‐reducing controls have been adopted in the structural design process, it is likely permissible to reduce the use of these during actual operation. Here, the probabilistic outcome of such a two‐stage controls adaptation is analyzed. The analysis considers the structural design of a 10 MW monopile offshore wind turbine under uncertainty in the site‐specific soil conditions. Two control strategies are considered in separate analyses: (a) tower feedback control to increase the support structure's fatigue life and (b) peak shaving to increase the support structure's serviceability capacity. The results show that a post‐installation adaptation can reduce the farm‐level side‐effects of load‐reducing controls by up to an order of magnitude.

中文翻译：

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海上风机控制的安装后适应

通过将控制策略纳入支撑结构设计过程中以减少支撑结构的负荷影响，可以降低海上风能的成本。降低负荷的控制措施虽然可以有效地降低支撑结构的成本，但会在其他风力发电机组件和子系统中产生潜在的代价高昂的副作用。本文提出了一种在风电场水平上减轻这些副作用的方法。地基与周围土壤之间的相互作用是估算支撑结构安全裕度时不确定性的主要来源。安全裕度通常与模态特性（固有频率，阻尼比）紧密相关。这允许在安装和调试风电场后使用模态识别技术重新评估结构安全性的可能性。由于设计标准要求保守的设计余量，因此安装后的安全评估可能显示出比预期的结构安全性能更好的性能。因此，如果在结构设计过程中采用了减轻负荷的控制措施，则可以允许在实际操作中减少使用这些措施。在这里，分析了这种两阶段控制适应的概率结果。分析考虑了现场特定土壤条件不确定性下的10兆瓦单桩海上风力发电机的结构设计。在单独的分析中考虑了两种控制策略：（a）塔式反馈控制，以增加支撑结构的疲劳寿命；（b）削峰，以增加支撑结构的使用寿命。