Model of the Correlation between Lidar Systems and Wind Turbines for Lidar-Assisted Control
- 1 October 2013
- journal article
- research article
- Published by American Meteorological Society in Journal of Atmospheric and Oceanic Technology
- Vol. 30 (10), 2233-2240
- https://doi.org/10.1175/jtech-d-13-00077.1
Abstract
Investigations of lidar-assisted control to optimize the energy yield and to reduce loads of wind turbines have increased significantly in recent years. For this kind of control, it is crucial to know the correlation between the rotor effective wind speed and the wind preview provided by a nacelle- or spinner-based lidar system. If on the one hand, the assumed correlation is overestimated, then the uncorrelated frequencies of the preview will cause unnecessary control action, inducing undesired loads. On the other hand, the benefits of the lidar-assisted controller will not be fully exhausted, if correlated frequencies are filtered out. To avoid these miscalculations, this work presents a method to model the correlation between lidar systems and wind turbines using Kaimal wind spectra. The derived model accounts for different measurement configurations and spatial averaging of the lidar system, different rotor sizes, and wind evolution. The method is compared to real measurement data with promising results. In addition, examples depict how this model can be used to design an optimal controller and how the configuration of a lidar system is optimized for a given turbine to improve the correlation.Keywords
This publication has 6 references indexed in Scilit:
- Analysis of light detection and ranging wind speed measurements for wind turbine controlWind Energy, 2013
- Nonlinear model predictive control of wind turbines using LIDARWind Energy, 2012
- Precision and shortcomings of yaw error estimation using spinner‐based light detection and rangingWind Energy, 2012
- On Longitudinal Spectral CoherenceBoundary-Layer Meteorology, 1979
- Turbulence characteristics along several towersBoundary-Layer Meteorology, 1970
- The Spectrum of TurbulenceProceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, 1938