为探究机组大型化对张力腿型浮式风力机的影响,以DTU 10 MW和NREL 5 MW风力机为研究对象,建立风力机系统耦合计算模型,对其在典型海况下的响应特性进行时域数值仿真,研究机组大型化产生的影响。结果表明,上部风力机大型化引起浮式基础运动响应放大,不同自由度运动耦合现象突出,运动频率成分更加复杂。在额定海况下,相对于5 MW机型,10 MW浮式风力机纵荡运动均值增大,垂荡运动平衡位置发生明显改变,纵摇运动剧烈程度增加,且基础纵摇运动出现更为复杂的谐振特性。同时,10 MW风力机叶片旋转平面外变形均值、平面内变形极值都较5 MW机型有所增加。此外,10 MW浮式风力机叶片变形对风速改变的敏感度更高。
Abstract
In order to study the effect of large scale wind turbine in tension leg type FOWT （Floating Offshore Wind Turbine）, the DTU 10 MW and NREL 5 MW wind turbines are taken as the research objects, and the coupling model of wind turbine-tower-floating foundation-mooring system is established. Time domain simulation is carried out and the influence of large scale FOWT is studied by comparing the difference in the floating foundation motion and blade deformation results. The results show that the large scale wind turbine leads to the increase of the motion of the floating foundation and makes the coupling effect more conspicuous and the frequency component more complex. Under the rated environmental condition, compared with the 5 MW model, the mean value of the surge motion of the 10 MW floating wind turbine increases by 47.2%, and the equilibrium position of the heave motion changes significantly. The intensity of the pitch motion is 1.7 times that of the former, and the pitch motion of the foundation exhibits more complex resonance characteristics. Meanwhile, the average out-of-plane deformation of the large scale wind turbine blade is 1.6 times that of the 5 MW wind turbine, and the in-plane deformation intensity is 1.8 times that of the 5 MW model. In addition, the blade deformation of 10 MW floating wind turbine is more sensitive to change of wind speed.
关键词
浮式风力机 /
张力腿平台 /
动态响应 /
耦合模型 /
机组大型化 /
叶片变形
Key words
floating wind turbines /
tension-leg platform /
dynamic response /
coupling model /
large scale wind turbine /
blade deformation
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基金
国家自然科学基金（52471298; 52001230）; 天津企业科技特派员项目（23YDTPJC00080）; 天津市自然科学基金（24JCYBJC01280）
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