Influence of the wind turbine blade model on echo's Doppler characteristics

Abstract

Wind turbines have serious electromagnetic interference to nearby radar stations. Accurately obtaining the Doppler characteristics of wind turbine's radar echo is the key technology and precondition to solve this problem. Based on the point scattering model of the wind turbines, the expression of the echo of the wind turbine blade scattering point model which is located at any point in the space is given, and the Doppler characteristic of the wind turbine blade echo is analysed by combining the existing integral model, which proves that the existing integral model is a special case of the scattering point model. Based on the radar resolution and Rayleigh resolution criteria, the scattering point spacing of the wind turbine blade is given. The simulation model is established according to the actual size of the wind turbines. After the analysis and comparison of the scattering point model and the integral wind turbine blade model, the simulation results of the wind turbine radar Doppler results are consistent with the theoretical analysis, which is of great significance to obtain the Doppler characteristics of the wind turbine blades.

Keywords

• Doppler radar
• blades
• wind turbines
• radar resolution
• electromagnetic interference
• Doppler characteristic
• point scattering model
• wind turbine blade echo
• scattering point spacing
• simulation model
• integral wind turbine blade model
• wind turbine radar Doppler
• electromagnetic interference
• radar stations
• wind turbine radar echo Doppler characteristics
• wind turbine blade scattering point model
• radar resolution
• Rayleigh resolution criteria