Turbulence Estimation from a Continuous-Wave Scanning Lidar (SpinnerLidar)

Mikkelsen, T. K. (Guest lecturer)

Activity: Talks and presentationsConference presentations

Description

One of the current challenges using lidars for wind energy measurements is the inability of lidars to accurately measure turbulence. Two important factors affecting lidar measurements of turbulence are:

1) the spatial averaging by the lidars sounding volume leading to smaller eddies being filtered out, and
2) the mixing of velocity co-variances from other components into the line-of-sight variance measurements.

Turbulence measurements based on upwind horizontal rotor plane scanning of the line-of-sight variance measurements combined with ensemble-averaged Doppler spectra width measurements is shown to provide unfiltered, un-truncated line-of-sight turbulence measurements similar to what is achievable from a hub-hight installed cup anemometer.
Period27 Jun 2017
Degree of RecognitionInternational

Keywords

  • DTU SpinnerLidar
  • turbulence
  • measurements