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Variable Blade Inertia in State-of-the-Art Wind Turbine Structural-Dynamics Models

Author

Listed:
  • Laurence Alhrshy

    (Wind Energy Technology Institute, Flensburg University of Applied Sciences, Kanzleistraße 91-93, 24943 Flensburg, Germany)

  • Alexander Lippke

    (AEROVIDE GmbH, Provianthausstr. 9, 24768 Rendsburg, Germany)

  • Clemens Jauch

    (Wind Energy Technology Institute, Flensburg University of Applied Sciences, Kanzleistraße 91-93, 24943 Flensburg, Germany)

Abstract

This paper presents a comparison of two methods to represent variable blade inertia in two codes for aero-servo-elastic simulations of wind turbines: the nonlinear aeroelastic multi-body model HAWC2 and the nonlinear geometrically exact beam model BeamDyn for OpenFAST. The main goal is to enable these tools to simulate the dynamic behavior of a wind turbine with variable blade inertia. However, current state-of-the-art load simulation tools for wind turbines cannot simulate variable blade inertia, so the source code of these tools must be modified. The validity of the modified codes is proven based on a simple beam model. The validation shows very good agreement between the modified codes of HAWC2, BeamDyn and an analytical calculation. The add-on of variable blade inertias is applied to reduce the mechanical loads of a 5-megawatt reference wind turbine with an integrated hydraulic-pneumatic flywheel in its rotor blades.

Suggested Citation

  • Laurence Alhrshy & Alexander Lippke & Clemens Jauch, 2023. "Variable Blade Inertia in State-of-the-Art Wind Turbine Structural-Dynamics Models," Energies, MDPI, vol. 16(16), pages 1-22, August.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:16:p:6061-:d:1220348
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    References listed on IDEAS

    as
    1. Laurence Alhrshy, 2021. "Implementation of Variable Blade Inertia in OpenFAST to Integrate a Flywheel System in the Rotor of a Wind Turbine," Energies, MDPI, vol. 14(10), pages 1-15, May.
    2. Clemens Jauch, 2021. "Grid Services and Stress Reduction with a Flywheel in the Rotor of a Wind Turbine," Energies, MDPI, vol. 14(9), pages 1-25, April.
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