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Transient behavior of wind towers grounding systems under lightning strikes

机译:雷电风塔接地系统的瞬态行为

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摘要

Wind turbines, because of their height and localization, are frequently subject to direct lightning strikes. Thus, the investigation on the performance of their grounding system is of paramount interest for the prediction of the potential threats either for people working in (or animals passing through) the wind farm area and for the power and control units installed in close proximity of the turbine towers. In this paper,we perform a comprensive study of the transient behavior of the earthing systems of wind turbines. The analysis is conducted in the frequency domain and an hybrid approach, based on circuit theory and Method of Moments, is adopted to fully account for resistive, inductive and capacitive couplings between elements of the ground system. The actual transient behavior is obtained by means of an Inverse Fourier Transform. The results, computed considering a typical wind turbine grounding system configuration, provide more insight on the nature of the early-time transient response of grounding systems and allow to draw up useful design guidelines.
机译:风力涡轮机由于其高度和位置而经常遭受直接的雷击。因此,对接地系统性能的研究对于预测在风电场区域工作的人(或穿过风场的动物)以及在风电场附近安装的电源和控制单元的潜在威胁至关重要。涡轮塔。在本文中,我们对风力发电机接地系统的瞬态行为进行了全面的研究。该分析是在频域中进行的,并且采用了一种基于电路理论和矩量法的混合方法来充分考虑接地系统元件之间的电阻,电感和电容耦合。实际的瞬态行为是通过逆傅立叶变换获得的。考虑到典型的风力涡轮机接地系统配置,计算得出的结果可提供有关接地系统早期瞬态响应性质的更多信息,并可以制定有用的设计准则。

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