摘要
风电机组的尾流效应是风电场能量损失的重要因素,研究尾流效应是为了优化风机布置,尽量减小风力机尾流的影响,降低风电场能量损失,使风电场的经济性达到最佳。而现有的许多工程应用的经验尾流模型,在准确性和适用性上都存在差异。以单台水平轴风电机组经验尾流模型为研究对象,分析了Jensen模型、Larsen模型、Frandsen模型和无粘近场模型等具有代表性的经验尾流模型的各自优缺点以及适用条件。然后,针对Jensen模型和无粘近场尾流模型的缺点进行了改进,并结合改进Jensen模型与改进的无粘近场尾流模型,分段建立了准确度更高适用性更强的全场尾流模型。最后,基于Sexbierum风电场尾流区测风数据对建立的全场尾流模型进行了对比验证。结果表明,全场尾流模型能够较好的拟合风场的实测数据,可以适用于风力机全场尾流速度分布的模拟以及指导工程实践。
The wake effect of wind turbine is an important factor of energy loss in wind farm.The wake effect is studied in order to better the fan arrangement,minimize the influence of the wind tail flow,reduce the energy loss of the wind farm,and optimize the economic efficiency of the wind farm.However,the existing empirical wake models of many engineering applications are different in accuracy and applicability.Based on an empiri-cal wake model of a single horizontal axis wind turbine as research object,this paper analyzes the advantages and disadvantages of representative models such as Jensen model,Larsen model,Frandsen model and inviscid near field model and the applicable conditions;then,according to the disadvantages Jensen model and the in-viscid near field wake model are improved;based on the improved Jensen model and the improved the inviscid near field wake model,a whole-field wake model with higher accuracy and applicability is established by sec-tions.Finally,based on the Sexbierum wind farm wake data the whole field wake model is compared and vali-dated.The result shows that the model can well fit the measured data of wind field and can be applied to whole field wake velocity distribution simulation of wind turbines and engineering practice guidance.
作者
吴阳阳
WU Yangyang(Huaneng Power International.,Inc.,Zhejiang Clean Energy Branch,Hangzhou 310014,China)
出处
《浙江电力》
2017年第11期92-98,共7页
Zhejiang Electric Power
关键词
风电机组
尾流模型
对比验证
全场尾流模型
wind turbine
wake model
comparison and verification
whole field wake model
