Application of Asymptotic and Rigorous Techniques for the Characterization of Interferences Caused by a Wind Turbine in Its Neighborhood

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.

The Impacts of Terrestrial Wind Turbine’s Operation on Telecommunication Services

“…The RCS of the portion σ n was modelled by the computation and summation of the scattered signal from each facet, as per Figure 3b, on the portion using the physical optics formulation [35,36]. In a similar study [37,38], the combination of physical and geometrical optics techniques was employed to undertake the issue of several interaction among the wind turbine's facet.…”

In-Situ ISAR Imaging of Wind Turbines

“…Simulations were also conducted using high-frequency ray tracing to corroborate the measurement findings. Subsequent works [7]- [15] have largely followed this line of investigation, i.e., focusing on the Doppler features of wind turbines at a fixed frequency.…”

Star-Delta Switches Evaluation for Use in Grid-Connected Wind Farm Installations

“…However, the exploitation of wind energy is particularly challenging with numerous research works carried out in this field [6][7][8][9][10][11][12]. For instance, many problems in electricity generation from wind are due to the fact that wind power may be highly variable at several timescales, that is, hourly, daily, or seasonally.…”