关于风力机异步变桨的初步研究

The First Step Research on Wind Turbine's Asynchronous Pitch-Control

由于存在风速的高度切变,使同步变桨距风力机风轮的各个叶片并非都处于最佳升阻比状态,影响了风力机功率的输出和减少了风力机的使用寿命。通过对风力机叶片的空气动力学分析,提出要使叶片始终处于最佳升阻比的基本原理以及实现这一目标时变桨系统所应达到的要求。

Because of the wind shear, synchronous pitch - controlled wind turbine＇s blade can＇ t be in the state of optimal ratio of lift over drag all the time, it affects wind turbine＇ s output power and cuts down the service life of the wind turbine. Through aerodynamic analyses about wind turbine＇s blade, this paper puts forward the basic truth about how to keep the blade always in the state of optimal ratio of lift over drag and how can the pitch- control system achieve this target.