Structural integrity of wind turbines impacted by tropical cyclones: A case study from China

The Science of Making Torque from Wind

Chen, Xiao^1 ; Li, Chuanfeng^1 ; Tang, Jing^1

National Laboratory of Wind, Turbine Blade Research and Development Center, Institute of Engineering Thermophysics, Chinese Academy of Sciences, 11 Beisihuanxi Road, Beijing

100190, China^1

关键词: Extreme wind conditions;    Failure locations;    Partial safety factor;    Quantitative investigation;    Terrain topography;    Three-dimensional CFD calculations;    Tropical cyclone;    Turbine designs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/4/042003/pdf
DOI  :  10.1088/1742-6596/753/4/042003

来源: IOP

【 摘 要 】

This study presents a case study on wind turbines impacted by tropical cyclones in China. A quantitative investigation is conducted by integrating aerodynamic, aero-elastic and structural analysis to provide insights into structural integrity of wind turbines under extreme wind conditions. Local mean wind profiles at each turbine site are reconstructed using threedimensional CFD calculation considering terrain topography of the wind farm. Failure modes and failure locations of rotor blades and tubular towers are predicted using finite element analysis. "The lesser of two evils" principle in the turbine design is addressed regarding the criticality of blade fracture and tower collapse. Referring to the current IEC standard for wind turbine design, it is suggested that the partial safety factor associated with failure of turbine tower should be larger than, instead of equal to, the one for the rotor blade to reduce the risk of the total loss of wind turbines in extreme wind conditions.