Field experiments of wind turbine vibrations in stand still conditions
article
Modern wind turbines become increasingly flexible, and as a result more sensitive to vibrations. Currently, wind turbine vibrations at standstill are observed at high wind speeds. However, the exact conditions and sources of excitation causing the vibrations are not sufficiently understood. Dedicated field experiment were executed, utilizing a parked 3.8 MW research turbine to identify these conditions. To trigger vibrations of the wind turbine, a dedicated test at different pitch and yaw angles and rotor positions was performed at standstill. The measurements were done for wind speeds of at least 15 m/s. During the experiment, blade root bending moments are measured together with surface static pressure distribution measurements at a cross section 15 m from the blade root. In addition to that, tower bending moments and accelerations are measured. The experimental data is analyzed first to identify the vibration modes and the associated conditions. To assist in this identification, wind turbine simulations are performed. The numerical studies confirm the need for realistic turbulent inflow conditions and a good dynamic stall model.
Topics
TNO Identifier
1021322
Source
Journal of Physics: Conference Series - EERA DeepWind Conference 2025, pp. 1-11.
Pages
1-11