On Wind Turbine Loads During Thunderstorm Downbursts in Contrasting Atmospheric Stability Regimes
On Wind Turbine Loads During Thunderstorm Downbursts in Contrasting Atmospheric Stability Regimes
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DOI：
10.3390/en12142773
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发表时间：
2019-07
期刊：
影响因子：
3.2
通讯作者：
Nanjun Lu;P. Hawbecker;S. Basu;L. Manuel
中科院分区：
文献类型：
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作者：
Nanjun Lu;P. Hawbecker;S. Basu;L. Manuel
雷暴下击暴流产生的强风对风力涡轮机的结构完整性构成严重风险。然而，风力涡轮机设计指南（如国际电工委员会标准，IEC 61400-1）没有真实地描述此类事件的关键物理特性。在这项研究中，一个大涡模拟模型产生几个理想的下击暴流事件在对比大气稳定性条件，范围从对流通过中性稳定。然后，将从该数据集生成的风场和湍流场用作5 MW陆基风力涡轮机模型的入流;对不同入流条件下的相关涡轮机负载进行估计和比较。我们首先讨论了下击暴流期间涡轮尺度流场的时变特性;其次，我们研究了速度时间序列与涡轮机载荷之间的关系以及涡轮机控制系统（用于叶片俯仰和短舱偏航）的影响和有效性。最后，进行统计分析，以评估对比的稳定性制度上的极端和疲劳负载的风力涡轮机的不同影响。
Severe winds produced by thunderstorm downbursts pose a serious risk to the structural integrity of wind turbines. However, guidelines for wind turbine design (such as the International Electrotechnical Commission Standard, IEC 61400-1) do not describe the key physical characteristics of such events realistically. In this study, a large-eddy simulation model is employed to generate several idealized downburst events during contrasting atmospheric stability conditions that range from convective through neutral to stable. Wind and turbulence fields generated from this dataset are then used as inflow for a 5-MW land-based wind turbine model; associated turbine loads are estimated and compared for the different inflow conditions. We first discuss time-varying characteristics of the turbine-scale flow fields during the downbursts; next, we investigate the relationship between the velocity time series and turbine loads as well as the influence and effectiveness of turbine control systems (for blade pitch and nacelle yaw). Finally, a statistical analysis is conducted to assess the distinct influences of the contrasting stability regimes on extreme and fatigue loads on the wind turbine.