The Proportion Analysis of the Electromagnetic Scattering Characteristics and the Construction of Analytical Model for Wind Turbine Blades

Electromagnetic scattering characteristics of the wind turbine blades are analyzed. Based on the proportion analysis of the wind turbine blade RCS to its overall radar scattering characteristics, the applicable range for the analysis model of the wind turbine blades is selected. The UG software is used to model the wind turbine blade in three dimensions , in which the influence factors on the scattering characteristics are considered, such as the angle between the rotation plane of the wind turbine blade and the line of Sight (LOS), wind turbine blade material and geometry and so on . The analytic model of the electromagnetic scattering characteristics of the real blade is constructed by using the difference of electromagnetic scattering characteristics between the actual blade and the corresponding simplified cylindrical blade. The proposed model can realize the fast calculation of the RCS of wind turbine blades. Finally, the results obtained by the proposed analytical model are compared with the measured data, which can verify the validity of the proposed analytical model.