偏航偏差角对风力机轮毂载荷的影响

The studies of the influence of yaw deviation angle on hub loads of wind turbine

偏航工况是风力机正常运行中的典型工况,为研究偏航工况下风力机轮毂载荷的特性,文章以某实验型3.0 MW机组为研究对象,通过叶片气动分析和Bladed软件仿真的方法,对不同偏航偏差角下的风力机载荷进行仿真分析,得到了风力机的输出功率及轮毂My和Mz的载荷。研究结果表明:当风力机运行在额定风速以下时,偏航偏差角的存在会降低风力机输出功率;当风力机运行在额定风速以上时,一定范围内的偏航偏差角能维持风力机满功率稳定运行。风力机在不同偏航方向下有不同的载荷表现,相比于负向的偏航偏差角,正向的偏航偏差角会导致更大的风力机轮毂载荷。该研究为大型风力机优化偏航控制及保护提供了参考。

Yaw condition is a typical working condition in the normal operation of wind turbine. In order to study the influence of yaw condition on the hub load of wind turbine,an experimental 3.0MW wind turbine is taken as the study object to simulate the turbine load under different yaw deviation angles, through the methods of blade aerodynamic analysis and the software Bladed simulation. And the output power of the wind turbine and the hub loads of My and Mz are obtained. The results show that different wind speed range and different yaw deviation direction will cause the difference of wind turbine load characteristics. When the wind turbine operates below the rated wind speed, the yaw deviation angle will reduce the output power of the wind turbine. When the wind turbine operates above the rated wind speed, it can maintain the stable operation and full power within a certain yaw deviation range. The positive yaw deviation will lead to greater hub load of wind turbine than the negative yaw deviation. The study can provide reference for optimizing yaw control and protection of large wind turbine.