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http://dx.doi.org/10.3795/KSME-A.2012.36.11.1455

Mitigation of Mechanical Loads of NREL 5 MW Wind Turbine Tower  

Nam, Yoon-Su (Dept. of Mechanical and Mechatronics Engineering, Kangwon Nat'l Univ.)
Im, Chang-Hee (Dept. of Mechanical and Mechatronics Engineering, Kangwon Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.11, 2012 , pp. 1455-1462 More about this Journal
Abstract
As the size of a wind turbine increases, the mechanical structure has to have an increasing mechanical stiffness that is sufficient to withstand mechanical fatigue loads over a lifespan of more than 20 years. However, this leads to a heavier mechanical design, which means a high material cost during wind turbine manufacturing. Therefore, lightweight design of a wind turbine is an important design constraint. Usually, a lightweight mechanical structure has low damping. Therefore, if it is subjected to a disturbance, it will oscillate continuously. This study deals with the active damping control of a wind turbine tower. An algorithm that mitigates the mechanical loads of a wind turbine tower is introduced. The effectiveness of this algorithm is verified through a numerical simulation using GH Bladed, which is a commercial aero-elastic code for wind turbines.
Keywords
Wind Turbine; Tower Loads; Damping Enhancement; Mechanical Load Alleviation Control;
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