风电机组偏航状态载荷控制  

Load Control Under Yawed Condition for Wind Turbine

作　　者：廖明夫[1] 吕品[1] 康刘宏 王巧艳 

机构地区：[1]西北工业大学旋转机械与风能装置测控研究所,西安710072

出　　处：《机械科学与技术》2018年第3期337-343,共7页Mechanical Science and Technology for Aerospace Engineering

摘　　要：随着低风速风场的不断开发,低风速型风电机组面临叶轮尺寸不断增加和风况更加多变的情况。叶轮尺寸的不断增大带来了叶片柔性的增加,需要更加准确的仿真模型。而风况的多变导致机组长期处于偏航状态,进而导致叶片载荷波动的加剧,对机组寿命产生较大的影响。基于非线性耦合模型,提出了一种独立变桨载荷控制方法。非线性耦合模型采用了几何精确梁和自由涡尾迹方法,更适用于大尺寸叶轮的流固耦合效应的仿真。结果显示,提出的独立变桨控制方法不需要复杂的控制系统和额外的传感系统,即可以获得较好的降载效果。With the development of low wind speed wind farm,the low wind speed horizontal-axis wind turbine（HAWT） is faced to the increasing large rotor and changeable wind condition. To improve the cost effectiveness of energy,weight-reduction techniques are widely used for large scaled blade. This results in lighter and more flexible rotor blades. It makes sense to develop a more accurate fluid solid interaction（ FSI） model. The changeable wind condition leads to longer operation under yawed condition. In this study,a load control strategy is introduced by applying a nonlinear FSI model. The nonlinear FSI model has been developed by coupling a geometrically exact beam（ GEB） with a free-vortex wake（ FVW） model. The results demonstrate that this load control strategy can decrease the load fluctuation efficiently without a complex control system and additional sensors.

关 键 词：风力发电 非线性流固耦合模型 几何精确梁 自由涡尾迹 偏航状态 载荷控制 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]