论文标题

多电流风力涡轮机的唤醒转向

Wake steering of multirotor wind turbines

论文作者

Speakman, Gustav A., Abkar, Mahdi, Martínez-Tossas, Luis A., Bastankhah, Majid

论文摘要

在本文中,将唤醒转向应用于多电动涡轮机,以确定它是否有可能减少风电厂唤醒损失。通过将转子偏航应用于多电动涡轮机,引入了一种新的自由度,以使风电场控制能够扩展,引导或重定向,以改善下游涡轮机的流入条件。研究了五种不同的偏航配置(包括基线情况),通过使用大型涡流模拟(LES)来生成多旋风风力涡轮机速度场下风的详细表示。来自单旋风偏航研究(卷曲的捕捞模型和分析高斯唤醒模型)的两个低保真模型扩展到多旋转案例,并将其结果与LES数据进行比较。对于每个模型,主要通过在不同的下风距离检查尾流横截面来分析尾流。通过在一系列流方位置的唤醒中心和宽度的特征以及对功率生产的简要分析,进行进一步的定量分析。最值得注意的是,转子偏航对唤醒速度不足的分布和幅度都有很大的影响,从而导致下游涡轮机的功率增益。低保真模型与特定配置的LES结果显示出很小的偏差。但是,两者都能够在较大的流范围内合理捕获唤醒趋势。

In this paper, wake steering is applied to multirotor turbines to determine whether it has the potential to reduce wind plant wake losses. Through application of rotor yaw to multirotor turbines, a new degree of freedom is introduced to wind farm control such that wakes can be expanded, channelled, or redirected to improve inflow conditions for downstream turbines. Five different yaw configurations are investigated (including a baseline case) by employing large-eddy simulations (LES) to generate a detailed representation of the velocity field downwind of a multirotor wind turbine. Two lower-fidelity models from single-rotor yaw studies (curled-wake model and analytical Gaussian wake model) are extended to the multirotor case and their results are compared with the LES data. For each model, the wake is analysed primarily by examining wake cross sections at different downwind distances. Further quantitative analysis is carried out through characterisations of wake centroids and widths over a range of streamwise locations, and through a brief analysis of power production. Most significantly, it is shown that rotor yaw can have a considerable impact on both the distribution and magnitude of the wake velocity deficit, leading to power gains for downstream turbines. The lower-fidelity models show small deviation from the LES results for specific configurations; however, both are able to reasonably capture the wake trends over a large streamwise range.

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