兆瓦级风电机组台风工况下载荷特性及停机策略研究

Research on Load Characteristics and Shutdown Strategy of Megawatt Wind Turbine under Typhoon Condition

为提出大型风电机组在台风等极端工况下的控制策略,阐述了台风基本特征,分析了台风工况下风电机组常见失效模式,结合大型风力发电机组的运行特点,给出了风力发电机组各部件受力情况。基于叶片气动载荷和塔架气动载荷计算原理,在BLADE软件中对台风工况下每隔30°为一个子工况进行仿真分析,得出在台风等极端风况下风电机组停机时与风向夹角180°时,塔底倾覆力矩和叶片弯矩较小。通过宁波近海白岩山风电场2.0 MW风机监测数据来验证其合理性,结果显示与仿真分析趋势一致,具有实际的推广应用价值。

In order to propose the control strategy of large wind turbines under extreme conditions such as typhoon, the basic characteristics of typhoon are described, and the common failure modes of wind turbines under typhoon conditions are analyzed. Combined with the operating characteristics of large wind turbines, the force of each component of the wind turbine is given. Based on the principle of blade aerodynamic load and tower aerodynamic load calculation, BLADE software is used to simulate and analyze sub-cases every 30°under typhoon conditions. It is concluded that under extreme wind conditions such as typhoon, when the wind turbine is shut down at an angle of 180°with the wind direction, the tower overturning moment and the blade bending moment are small. The rationality of the 2.0 MW wind turbine monitoring data of Ningbo Offshore Baiyanshan Wind Farm is verified. The results show that it is consistent with the trend of simulation analysis and has practical application value.