Abstract
This paper presents a complete assessment to the interferences caused in the nearby radio systems by wind turbines. Three different parameters have been considered: the scattered field of a wind turbine, its radar cross-section (RCS), and the Doppler shift generated by the rotating movements of the blades. These predictions are very useful for the study of the influence of wind farms in radio systems. To achieve this, both high-frequency techniques, such as Geometrical Theory of Diffraction/Uniform Theory of Diffraction (GTD/UTD) and Physical Optics (PO), and rigorous techniques, like Method of Moments (MoM), have been used. In the analysis of the scattered field, conductor and dielectric models of the wind turbine have been analyzed. In this way, realistic results can be obtained. For all cases under analysis, the wind turbine has been modeled with NURBS (Non-Uniform Rational B-Spline) surfaces since they allow the real shape of the object to be accurately replicated with very little information.
Highlights
In the last decade, the interest in renewable energy has increased as a consequence of the climate change and the diminishing of fossil fuel
(iii) Doppler spectra: as in the analysis of the scattered field, Uniform Theory of Diffraction (UTD), MoM, and MoM-Physical Optics (PO) have been used to compute the Doppler shift caused by a wind turbine
This paper presents several analyses to characterize the interferences caused by a wind turbine on radio systems located in its vicinity
Summary
The interest in renewable energy has increased as a consequence of the climate change and the diminishing of fossil fuel. The large size and rotational movement of the turbine blades produces a shift on the frequency of electromagnetic signals. This causes serious distortion on telecommunication systems. In the group of asymptotic techniques, several studies such as [15, 16] the use of Physical Optics (PO) solutions for the computation of RCS This previous research does not take into account multiple reflections and surface wave propagation. (iii) Doppler spectra: as in the analysis of the scattered field, UTD, MoM, and MoM-PO have been used to compute the Doppler shift caused by a wind turbine For all these cases, the geometrical model plays an important role.
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