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Determination of the Parameters of Ground Acoustic-Impedance in Wind Farms

Author

Listed:
  • Jiaying Wu

    (College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

  • Jing Wang

    (College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

  • Zhenye Sun

    (College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

  • Wei Jun Zhu

    (College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

  • Wen Zhong Shen

    (College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract

The ground surface near a wind turbine has a significant influence on the sound propagation from the turbine, and it is therefore important to determine the ground impedance, a quantity that characterizes the ground surface acoustically. Outdoor ground parameters required by a multi-parameter model used to calculate the ground acoustic-impedance are typically unknown, which brings inconvenience for the model use. This paper introduces a technique to determine the parameters of ground acoustic-impedance for use in a multi-parameter impedance model (for example, the Attenborough four-parameter model). The technique consists of three steps: first, the data for sound-pressure level measured at a distance from two different heights are collected, and the sound-pressure-level difference is calculated; second, in line with the experimental data and the sound-pressure-level calculation formula, the MATLAB optimization tool is used to find the optimal values of the parameters used in the impedance model; and finally, when the optimization is finished, the acoustic impedance of the ground is obtained by substituting the optimal values into the impedance model. To check the performance of the calculation, the calculated sound-pressure-level difference is compared to the experimental one. Compared with a traditional method, the technique can significantly reduce the calculation error.

Suggested Citation

  • Jiaying Wu & Jing Wang & Zhenye Sun & Wei Jun Zhu & Wen Zhong Shen, 2022. "Determination of the Parameters of Ground Acoustic-Impedance in Wind Farms," Sustainability, MDPI, vol. 14(23), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:23:p:15489-:d:979937
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    References listed on IDEAS

    as
    1. Nyborg, Camilla Marie & Shen, Wen Zhong, 2021. "New measurement technique for ground acoustic impedance in wind farm," Renewable Energy, Elsevier, vol. 164(C), pages 791-803.
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