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Risk-based maintenance planning of offshore wind turbine farms

机译：海上风力涡轮机农场的风险维护规划

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A risk-based maintenance planning for offshore wind farm installations is developed. Initially, the optimal number of monopile offshore wind turbines to be installed in an offshore wind farm is estimated, targeting a minimum levelised cost of energy. To this end, a sufficient number of design combinations for monopile support structure is generated by the design of experiment technique and then analysed based on the fatigue limit state. Following the fatigue reliability analysis performed for the monopile designs, an analytical relation between manufacturing cost and the structural safety regarding fatigue is developed to be used in the life-cycle cost analysis. The offshore wind farm is considered here as a system consisting of correlated components. The system reliability is estimated by using Ditlevsen bounding technique, which uses a time-variant correlation matrix of offshore wind turbines. The event tree method is employed to assess the expected cost of failure to be included in the capital investment as the structural risk premium, and the total expected cost to be included in the operational cost. Furthermore, different inspection policies are studied, and the most cost-effective inspection and maintenance policy is found for each studied wind farm. The present study also develops a novel framework for inspection and maintenance planning that maximises the benefits of performing inspections for a multi-unit system. Finally, the developed framework is applied to an offshore wind farm with sixty installations, and the detailed description of the planned inspections are discussed.
机译：开发了一种基于风险的海上风电场安装的维护计划。最初，估计要安装在海上风电场中的最佳纪式近海风力涡轮机的最佳数量，瞄准最小的能量的能量成本。为此，通过实验技术的设计生成足够数量的单一支持结构组合，然后基于疲劳极限状态分析。在对单披露设计进行的疲劳可靠性分析之后，制造成本与疲劳的结构安全性之间的分析关系用于生命周期成本分析。近海风电场在这里被认为是由相关组件组成的系统。利用DITLEVSEN边界技术估计系统可靠性，其使用了近海风力涡轮机的时变相关矩阵。事件树方法用于评估未纳入资本投资的预期成本作为结构风险溢价，以及在业务费用中包含的总成本。此外，研究了不同的检查政策，每个学习的风电场都发现了最具成本效益的检查和维护政策。本研究还开发了一种用于检查和维护规划的新框架，可最大限度地提高对多单元系统进行检查的好处。最后，发达的框架应用于有六十设施的海上风电场，并讨论了计划检查的详细描述。

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