降低成本:10MW风力发电机浮动子结构的案例研究

I. E. Udoh, J. Zou
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引用次数: 1

摘要

发电成本必须具有竞争力,海上风电行业才能持续生存和发展。人们普遍认为,采用大容量风力涡轮机(10兆瓦或更高)是降低能源平准化成本的有效途径。行业趋势表明,大容量涡轮机的使用迫在眉睫,现有浮动子结构概念的适用性正在受到挑战。本文对支撑大容量水轮机的浮动子结构的特性进行了评价。通过气动-液压-伺服-弹性动力学仿真,研究并验证了采用浮动结构概念的10 MW风力机在100米水深的应用。考虑的环境载荷包括风、波和电流,并在时域进行模拟以捕获相互作用和非线性响应。RNA上的风荷载使用湍流风场进行建模,湍流强度代表了海上环境,而平台上的风荷载则使用可靠的风荷载系数进行捕获。重点介绍了10MW汽轮机对机舱、塔架、平台和系泊的影响,并讨论了响应之间的相关性。使用功率谱密度(描述低、波和高频效应)和极端统计对响应进行量化和比较。本文讨论的比较强调了平台特征的适应性对于保持高容量涡轮机应用中浮动子结构的良好响应的重要性。为了快速简便地测量子结构船体效率,采用了船体钢效率指标。这项研究的发现提供了一个解决方案,可以大幅降低成本,并为未来的发展提供见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Driving Down Cost: A Case Study of Floating Substructure for A 10MW Wind Turbine
Power generation costs must be competitive for the offshore wind industry to survive and advance consistently. It is widely believed that adopting high-capacity wind turbines (10 MW or higher) is an effective approach to reduce levelized costs of energy. Industry trends indicate that use of high-capacity turbines is imminent, and the suitability of existing floating substructure concepts is being challenged. This paper assesses characteristics of a floating substructure for supporting high-capacity turbines. A 10 MW wind turbine application with the floating structure concept in 100m water depth is investigated and verified by using aero-hydro-servo-elastic dynamic simulations. Environmental loads considered are wind, wave and current, and simulations are performed in time domain to capture interactions and non-linear responses. Wind loading on the RNA is modeled using turbulent wind fields, with turbulence intensities representative of offshore environments, whereas wind loads on the platform are captured using reliable wind load coefficients. Effects of a 10MW turbine on the nacelle, tower, platform and moorings are highlighted, and correlations between the responses are discussed. The responses are quantified and compared using power spectral densities (to delineate low, wave and high frequency effects) and extreme statistics. Comparisons discussed in this paper underscore the importance of adaptability of platform features to maintain favorable responses of floating substructures for high-capacity turbine applications. A hull steel efficiency indicator is adopted for the quick and simple measure of substructure hull efficiency. Findings of this study offer one solution to drive down the cost dramatically and provide insights for future developments.
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