Field Validation of the Stability Limit of a Multi MW Turbine

The Science of Making Torque from Wind

Kallesoøe, Bjarne S.^1 ; Kragh, Knud A.^1

Siemens Wind Power A/S, Borupvang 9, Ballerup

2750, Denmark^1

关键词: Field validation;    Non linear;    Rotor speed;    Rotor-speed stability;    Siemens;    Stability limit;    State of the art;    Turbine designs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/4/042005/pdf
DOI  :  10.1088/1742-6596/753/4/042005

来源: IOP

【 摘 要 】

Long slender blades of modern multi-megawatt turbines exhibit a flutter like instability at rotor speeds above a critical rotor speed. Knowing the critical rotor speed is crucial to a safe turbine design. The flutter like instability can only be estimated using geometrically non-linear aeroelastic codes. In this study, the estimated rotor speed stability limit of a 7 MW state of the art wind turbine is validated experimentally. The stability limit is estimated using Siemens Wind Powers in-house aeroelastic code, and the results show that the predicted stability limit is within 5% of the experimentally observed limit.