湍流强度对风电机组动力学特性及载荷的影响  

Effects of turbulence intensity on dynamic characteristics and load of wind turbine

作　　者：巫发明 杨从新[1] 王靛 杨柳 Wu Faming;Yang Congxin;Wang Dian;Yang Liu(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;CRRC Zhuzhou Institute Co.,Ltd.Wind Power Business Unit,Zhuzhou 412000,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]中车株洲电力机车研究所有限公司风电事业部,株洲412000

出　　处：《农业工程学报》2020年第13期48-55,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：政府间国际科技创新合作重点专项(2017YFE0101900);国家自然科学基金:(11262011)。

摘　　要：为研究湍流强度对机组动力学特性及气动载荷的影响,以3.3 MW三叶片水平轴风电机组为研究对象,采用仿真及试验相结合的方法,并对来流风速和主导载荷进行功率谱分析。通过开展4种湍流强度0.10、0.12、0.14和0.16的计算仿真,结果表明随着湍流强度的增加,风电机组机舱振动加速度、载荷及等效疲劳载荷都有规律性变化。为验证仿真结果的合理性,对某风场的型式测试机组进行1a多的数据测试采集和分析。测试结果表明,机组运行在0.06、0.08、0.10和0.12这4种不同湍流强度下,其机组在不同风速运行下的机组振动及载荷同样出现有规律性的变化,仿真与实测结果的变化趋势吻合度较高。该研究为风电场风电机组的微观选址提供依据,也对风电机组设计有一定的指导意义。In order to study the influence of turbulence intensity on the dynamic characteristics and aerodynamic load,simulation tests and experiments are carried out for a horizontal axis wind turbine with three blades whose rated power is 3.3 MW.Furthermore,the power spectrum analysis of incoming wind speed and dominant load is carried out.Simulation tests are taken under the condition of four turbulence intensities of 0.10,0.12,0.14 and 0.16,whose results show that with the increase of turbulence intensity,the vibration acceleration,load and equivalent fatigue load of wind turbine nacelle change regularly.In order to verify the rationality of the simulation results,the data acquisition and analysis of a type-test wind turbine for more than one year were carried out.The main conclusions are as follows:1)From the simulation results,with the increase of turbulence intensity,the vibration acceleration of wind turbine nacelle increases.When the turbulence intensity increases by 0.02,the acceleration increases by 10%.Besides,there is also a strong correlation between the side-to-side vibration and turbulence intensity where there is a peak point near the rated wind speed.The reason is that there is a switching process from torque control to pitch control,and there is a certain impact.2)From the simulation results,with the increase of turbulence intensity,the key load and fatigue load of important components of wind turbine increase.When the turbulence intensity increases by 0.02,the equivalent fatigue loads of blade root MY,hub MY,tower top and tower bottom MY increase by nearly 10%.From the result of power spectrum analysis,the turbulence intensity has obvious influence on wind turbine,especially on MY load of blade,hub and tower top.3)From the test results,the turbulence intensity is strongly related to the vibration and fatigue equivalent load of the wind turbine nacelle,and vibration and load of the unit also change regularly under the four different turbulence intensities of 0.06,0.08,0.10 and 0.12,which is in good agree

关 键 词：风 发电 动力学 风电机组 湍流强度 气动载荷 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]