Preliminary Design of a Multi-Column TLP Foundation for a 5-MW Offshore Wind Turbine
Preliminary Design of a Multi-Column TLP Foundation for a 5-MW Offshore Wind Turbine
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DOI：
10.3390/en5103874
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发表时间：
2012-10
期刊：
影响因子：
3.2
通讯作者：
Yongsheng Zhao;Jianmin Yang;Yan-ping He
中科院分区：
文献类型：
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作者：
Yongsheng Zhao;Jianmin Yang;Yan-ping He
目前，浮式风力涡轮机(FWTs)可能是更经济、更适合在深水开发海上风能的系统。在海上风电场的各种浮动基础中，张力腿平台(TLP)基础可以为目前可用的海上风力发电机组提供一个相对稳定的平台，而不需要进行重大修改。在这项研究中，根据NREL 5 MW海上风电机组的具体环境条件，开发了一种新的多柱式TLP基础(Windstar TLP)，其条件与OC3-Hyind(NREL)条件相同。通过水动力分析和自振频率分析，对其总体布置、主要结构和系泊系统进行了设计和研究。整个系统通过转子激励避免了共振。利用数值工具FAST在时间域内进行了气动-液压-伺服-弹性耦合分析。对关键参数进行了统计和分析，并与MIT/NREL TLP进行了比较。结果显示，设计符合设计要求，拟建的Windstar TLP在极端风浪条件下具有良好的运动特性，结构更轻、更小。这一新概念具有进一步发展的巨大潜力。
Currently, floating wind turbines (FWTs) may be the more economical and suitable systems with which to exploit offshore wind energy in deep waters. Among the various types of floating foundations for offshore wind farms, a tension leg platform (TLP) foundation can provide a relatively stable platform for currently available offshore wind turbines without requiring major modifications. In this study, a new multi-column TLP foundation (WindStar TLP) was developed for the NREL 5-MW offshore wind turbine according to site-specific environmental conditions, which are the same as the OC3-Hywind (NREL) conditions. The general arrangement, main structure and mooring system were also designed and investigated through hydrodynamic and natural frequency analyses. The complete system avoids resonance through the rotor excitations. An aero-hydro-servo-elastic coupled analysis was carried out in the time domain with the numerical tool FAST. Statistics of the key parameters were obtained and analysed and comparisons to MIT/NREL TLP are made. As a result, the design requirements were shown to be satisfied, and the proposed WindStar TLP was shown to have favourable motion characteristics under extreme wind and wave conditions with a lighter and smaller structure. The new concept holds great potential for further development.