风力发电机组的有限元分析及动力特性研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
风力发电近年发展迅猛,中国是世界第一风能大国,安装有大量风力发电机组。风力发电机组受到风荷载和地震等动力作用,通常采用有限元方法建立风力发电机组的动力学模型。由于叶片参数不易获得,有限元建模可将叶轮和机舱质量集中在塔架顶部(模型1),或采用等截面均质梁模拟叶片(模型2)。本文基于某65kW风力发电机组试验数据,分析了两种模型动力特性的差异。结果表明:模型1的1、2阶塔架频率与试验数据误差在10%以内,模型2可进一步减小误差。但叶片刚度对风力发电机组频率影响较大,如果叶片刚度选择不当,会造成较大误差。模型1和模型2的1阶塔架模态几乎相同,但2阶模态存在一定差异。
Wind energy has been developing very fast in recent years and China is the leading country with a great number of wind turbines assembled.A wind turbine is subjected to the dynamic wind load and the seismic action and the finite element method is usually adopted to create the dynamic model for wind turbine.Since it is difficult to obtain the blade parameters,so the first method is to concentrate the rotor and nacelle masses on the tower top(model 1),and the second method is to apply a uniform cross-section beam to simulate the blades (model 2).In this paper,the difference of these two models in dynamic characteristics is analyzed,based on the experimental data of a 65kW wind turbine.The results indicate that the errors of model 1 with the test value on the first and second tower frequency are less than 10%and the errors of model 2 are even lower.But the stiffness of the blades affects the frequency of the wind turbine obviously,which may causes a significant error unless an appropriate stiffness is selected.The first tower modes of model 1 and model 2 are almost the same while the second tower modes of the two models exhibit a certain difference.
引文
[1]World wind energy association.World wind energy report 2011[R],2012
    [2]Global wind energy council.Global wind energy outlook 2010[R].2010
    [3]Zhu Lei Seismic response of wind turbine in the parked and operating conditions[D].the University of Tokyo,Japan,2007
    [4]Zavvos,D.Bang,A.S.McDonald,H.Polinder and M.Mueller Structural analysis and optimisation of transverse flux permanent magnet machines for 5 and 10 MW direct drive wind turbines[J] Wind Energy,2012,No.15,19-43
    [5]季亮,祝磊.风力发电机组抗震研究综述[C].中国可再生能源学会2011年学术年会(风能),北京,2011.09 Ji Liang,Zhu Lei.Review of seismic research on wind turbines[C], 2001 annual conference of Chinese renewable energy association (wind energy),Beijing,2001.09
    [6]Bazeos N.,Hatzigeorgiou G.D.,Hondras I.D.,Karamaneas H., Karabalis D.L.and Beskos D.E.Static,seismic and stability analyses of a prototype wind turbine steel tower[J].Engineering structures,2002,Vol.24,No.8,1015-1025
    [7]Lavassas I.,Nikolaidis G.,Zervas P.,Efthimiou E.,Doudoumis I. N.and Baniotopoulos C.C.Analysis and design of the prototype of a steel 1-MW wind turbine tower[J].Engineering Structures, 2003,Vol.25,No.8,1097-1106
    [8]祝磊,姚小芹,王元清,石永久.600kW风力发电机组地震反应谱分析[J].太阳能学报,2012,第33卷第10期??Zhu Lei,Yao Xiaoqin,Wang Yuanqing,Shi Yongjiu.Seismic response spectrum analysis of a 600kW wind turbine[J].Acta Energiae Solaris Sinica,2012,Vol.33,No.10
    [9]Ahlstrom A.,Aeroelastic simulation of wind turbine dynamics[D]. Royal Institute of Technology,Sweden,2005
    [10]Witcher D.,Seismic analysis of wind turbines in the time domain [J].Wind Energy,2005,No.8,81-91
    [11]Ian Prowell,Chia-Ming Uang,Ahmed Elgamal,J.Enrique Luco,and Lanhui Guo,Shake table testing of a utility-scale wind turbine[J].Journal of Engineering Mechanics,2011.doi: 10.1061/(ASCE) EM.1943-7889.0000391
    [12]贺广零.风力发电高塔系统风致随机动力响应分析与抗风可靠度研究[D],同济大学,2009 He Guangling.Stochastic dynamic response and reliability analysis of wind turbine systems under wind loads[D].Tongji University,2009
    [13]李长凤.风力发电结构动力反应的一体化有限元模型分析[J].特种结构,2008,第25卷第2期,17-19

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心