Wind turbine rotor-effective wind speed estimated by nacelle-mounted Doppler wind lidars

Dominique Philipp Held, Jakob Mann

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    Abstract

    Over the past two decades, research has demonstrated a substantial structural load reduction potential of lidar-assisted wind turbine controllers; especially for lidar-assisted pitch control, opening the possibility of lighter rotors and cheaper wind turbines. Knowing how well a lidar can estimate the rotor-effective wind speed (REWS) is an important aspect of designing an optimal pitch controller. This contribution investigates the inter-comparison between REWS estimated by a forward-looking nacelle-mounted lidar and the wind turbine itself. We present measurements from two experimental campaigns, where an economical and robust cw Doppler wind lidar is mounted on a heavily instrumented Vestas V52 turbine. The results indicate that the coherence between lidar and turbine estimated REWS is in agreement with analytical models. Also, the time delay between the two signals conforms to the expected results. This implies that the models used to design and optimize lidar-assisted pitch controllers match with experimental results.
    Original languageEnglish
    Title of host publicationProceedings of the 19th Coherent Laser Radar Conference, CLRC 2018
    PublisherCooperative Institute for Research in Environmental Sciences
    Publication date2018
    Article numberTh3
    ISBN (Print)9781510870338
    Publication statusPublished - 2018
    Event19th Coherent Laser Radar Conference - Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
    Duration: 18 Jun 201821 Jun 2018
    Conference number: 19
    https://clrccires.colorado.edu/

    Conference

    Conference19th Coherent Laser Radar Conference
    Number19
    LocationOkinawa Institute of Science and Technology Graduate University
    Country/TerritoryJapan
    CityOkinawa
    Period18/06/201821/06/2018
    Internet address

    Keywords

    • Nacelle lidar
    • Pitch control
    • Rotor-effective wind speed
    • Wind energy
    • Wind turbine

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