基于散射电场的地面背景下风电机叶片回波模拟
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TN957

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国家自然科学基金资助项目(51977121)资助


Simulation of Wind Turbine Blade Echo in the Presence of Ground Based on Scattered Electric Field
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    摘要:

    准确模拟风电机雷达回波信号并分析其多普勒特征,对解决风电场对雷达台站的无源干扰问题具有重要意义。针对传统地面背景下的风电机回波算法的假设缺陷,本文提出了一种基于散射电场的地面背景下风电机叶片回波模拟方法。根据多径效应,明确了雷达信号在风电机叶片与地面之间的四种传播路径,基于镜像等效原理,将风电机叶片与地面之间的耦合路径,等效成了风电机叶片在自由空间中的双站散射路径。以Vestas-V82型风电机为算例,对地面背景下的风电机叶片时域回波和时频域回波进行模拟,并与传统方法进行对比分析,结果表明本文方法能更准确的模拟出地面背景下风电机叶片回波,为风电机雷达回波信号的识别与杂波抑制提供理论参考。

    Abstract:

    Accurate simulation of wind turbine radar echo signals and analysis of its Doppler characteristics are of great significance to solving the problem of passive interference from wind farms to radar stations. Aiming at the hypothetical defects of the traditional wind turbine echo algorithm in the presence of ground, this paper proposes a method for simulating the echo of the wind turbine blade in the presence of ground based on the scattering electric field. According to the multipath effect, the four propagation paths of the radar signal between the wind turbine blade and the ground are clarified, and the coupling paths between the wind turbine and the coupling path between the wind turbine and the ground is equivalent to the bistatic scattering path of the wind turbine in free space based on the principle of mirror image equivalence. Taking the Vestas-V82 wind turbine as an example, the wind turbine blade echo in the presence of ground is simulated, and compared with the traditional method. The results show that the proposed method can more accurately simulate the wind turbine blade echo in the presence of ground. It provides a theoretical reference for the identification and clutter suppression of wind turbine radar echo signals.

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黄力,代朝阳,唐波,等. 基于散射电场的地面背景下风电机叶片回波模拟[J]. 科学技术与工程, 2021, 21(33): 14193-14199.
Huang Li, Dai Chaoyang, Tang Bo, et al. Simulation of Wind Turbine Blade Echo in the Presence of Ground Based on Scattered Electric Field[J]. Science Technology and Engineering,2021,21(33):14193-14199.

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  • 收稿日期:2021-04-14
  • 最后修改日期:2021-11-09
  • 录用日期:2021-08-25
  • 在线发布日期: 2021-11-23
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