叶片覆冰对抗冰冻机组载荷特性的影响

Effect of anti-freezing wind turbine load characteristic under the conditions of icing blades

风电机组运行在低温、高湿的环境中,叶片往往会出现结冰现象.叶片覆冰后改变了叶片原有翼型形状且影响叶片的固有频率,进而影响风电机组的载荷特性.抗冰冻机组从安全性设计角度考虑低温环境下叶片覆冰对风电机组载荷的影响.以某2MW陆上抗冰冻机组为研究对象,采用GH Bladed软件建立风电机组模型,结合特定环境条件考虑均匀覆冰、不均匀覆冰以及低温环境中不同空气密度对风电机组极限载荷的影响,统计风电机组关键部件中叶片、轮毂、塔架上的载荷,分析叶片覆冰前后风电机组关键部件极限载荷变化情况,为抗冰冻机组的设计优化提供参考.

Wind turbines operated under the low temperature and high humidity, as frequently iced on the blades. Airfoils and nature frequency of blades are effected after ice accretion, and further load characteristic of wind turbine was influenced. Load characteristic of wind turbine effected by icing blades should be considered in the low temperature from the perspective of system security. Taking a 2 MW wind turbine as research object,wind turbine model was established by GH Bladed, the effect on ultimate loads of wind turbine was considered under the conditions of uniform icing, uneven icing on rotor and different air density, then ultimate loads of blades, hub, tower of wind turbine was calculated, and changes of ultimate loads before and after icing blades was analyzed for the optimization design.