基于三维卷吸尾流模型的风电场功率计算

Wind Farm Power Calculation Based on Three-dimensional Entrainment Wake Model

摘要: 风电场中风力机尾流产生叠加效应。为更加准确地计算风电场的尾流风速的分布，该文基于作者前期建立的单台风力机的三维余弦形状的卷吸尾流模型(3DCLE模型)，考虑尾流叠加效应，建立了风电场尾流模型(3DCLEWFM)。通过Horns Rev海上风电场及Nørrekær Enge陆上风电场的实测数据来进行验证。结果表明，3DCLEWFM能够精准预测不同风向下风电场中风力机的输出功率，两种案例下，精度较Jensen风电场尾流模型(Jensen wind farm model，JWFM)提高65%和86%，较BPA风电场尾流模型(BPAWFM)提高48%和66%。

Abstract: Wind turbine wakes in wind farms generate the effect of wake overlap. To accurately calculate the wind speed distribution in the wake, the paper establishes a wind farm wake model (3DCLEWFM) based on the previously proposed three-dimensional cosine-shaped entrainment wake model (3DCLE model) for a single wind turbine, considering the wake overlap effect. The 3DCLEWFM model is validated by the measured data from Horns Rev offshore wind farm and Nørrekær Enge onshore wind farm. The results show that 3DCLEWFM can accurately predict the output power of wind turbines in wind farms under different wind directions, and the accuracy of 3DCLEWFM is improved by 65% and 86% compared to the Jensen wind farm wake model (JWFM), and 48% and 66% compared to BPA wind farm wake model (BPAWFM) in both cases.