摘要
风场是影响风力机气动和结构特性的最直接因素。基于对不同风况模拟、气动计算,以某1.5 MW风力机为例,模拟其在不同风况下的动力学特性动态响应。通过分析各叶片叶尖位移、叶根受载及塔架顶端位移的动态响应,结合发电工况分析控制策略的选择。研究结果表明:在添加相干湍流到基础湍流上模拟拟序结构风况时,叶尖挥舞、摆振;叶根挥舞弯矩、摆正弯矩、变桨力矩;塔尖前后挥舞、左右摆振都有不同程度的增大。且风轮计算点上部分风速已远大于参考风速,控制策略的选择需要根据瞬时风速而变。研究成果对风力机的气动、结构设计和控制策略的改进具有一定的参考价值。
Wind field is the most direct factor to affect the aerodynamic and structural characteristics of the wind turbine. Based on different wind speed and aerodynamic calculation, it simulated the dynamic properties of dynamic response of a 1.5MW wind turbine. By analyzing the dynamic response of the blades＇ tip deflections, root moments and tower-top deflections, it determined the control strategy. The results show that the out-of-plane, in-plane tip deflections; the out-of-plane, in-plane, pitching moments at the blade root; bearing fore-aft deflection, bearing side-to-side tower-top deflections are increased in different degrees when add a coherent turbulence wind on the background turbulence wind. Part of the wind speed is greater than the reference wind speed in the rotor. So the control strategy should base on the instantaneous wind speed. The results have reference value to the improvement of the aerodynamic, structure design and control strategy.
出处
《机械强度》
CAS
CSCD
北大核心
2014年第5期728-733,共6页
Journal of Mechanical Strength
基金
国家自然科学基金(E51176129)
上海市教育委员会科研创新(重点)项目(13ZZ120)
教育部高等学校博士学科点专项科研基金(博导类)(20123120110008)资助~~
关键词
风力机
动力学特性
动态响应
控制策略
Wind turbine： Dynamic characteristic
Dynamic response
Control strategy
