Calibration report for Avent 5-beam Demonstrator lidar

Antoine Borraccino, Michael Courtney

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    Nacelle-based profiling LiDARs may be the future of power performance assessment. Due to their large rotor size, single-point measurements are insufficient to quantify the power modern wind turbines can harness. The available energy in the wind indeed varies with heights. Improving power performance assessment by measuring simultaneously at different heights has been demonstrated using ground-based profiling LIDARs. Using nacelle lidars avoids the erection of expensive meteorology masts, especially offshore.
    As for any other measuring system, lidars measurements have uncertainties. Their estimation is the ultimate goal of a calibration: a relation is established between reference measurements from calibrated instruments and corresponding LiDAR indications. Traceability in the calibration is obtained by transferring measurement uncertainties from the reference instrument through the calibration process.
    A generic methodology to calibrate profiling nacelle lidars has been developed and performed on a 5-beam Demonstrator lidar manufactured by Avent Lidar Technology. In essence, the generic methodology calibrates the inputs of the wind reconstruction algorithms rather than their outputs.
    This report presents the calibration procedures and results of a 5-beam Demonstrator unit. The calibration was performed at DTU’s test site for large wind turbines, Høvsøre, Denmark. The methods to assess radial wind speed uncertainties are detailed together with an example of how to derive reconstructed wind parameters’ uncertainties.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherDTU Wind Energy
    Number of pages83
    ISBN (Electronic)978-87-93278-37-0
    Publication statusPublished - 2016
    SeriesDTU Wind Energy E


    • DTU Wind Energy E-0087
    • DTU Wind Energy E-87


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