Blade Vibration Analysis and Pitch Control of Large-scale Wind Turbines = 대형 풍력 터빈의 블레이드 진동 해석 및 피치 제어

The assumed modes method is developed to derive a set of linear differential equations describing the motion of a flexible wind turbine blade and to propose an approach to investigate the forced responses result from various wind excitations. In this work, we have adopted Euler beam theory and considered that the root of the blade is clamped at the rigid hub. And the aerodynamic parameters and forces are determined based on Blade Element Momentum (BEM) theory and quasi-steady aerodynamics. Numerical calculations show that this method gives good results and it can be used for modeling and the forced vibration analysis of wind-turbine blades including bending-torsion coupling effect, as well as turbo-machinery blades, aircraft propellers or helicopter rotor blades which may be considered as straight non-uniform beams with built-in pre-twist. In addition, an individual blade pitch control strategy is proposed by employing the developed blade model, in order to alleviate fatigue loads acting on the wind turbine blade and rotor shaft. Numerical simulation clearly demonstrates that the proposed control strategy is effective.
Advisors
Lee, Chong-Wonresearcher이종원researcher
Publisher
한국과학기술원
Issue Date
2008
Identifier
301884/325007  / 020064024
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학전공, 2008. 8., [ xiii, 75 p. ]

Keywords

wind turbine blade; vibration analysis; individual pitch control; load reduction; 풍력 터빈 블레이드; 진동 해석; 독립 피치 제어; 하중 저감; wind turbine blade; vibration analysis; individual pitch control; load reduction; 풍력 터빈 블레이드; 진동 해석; 독립 피치 제어; 하중 저감

URI
http://hdl.handle.net/10203/45645
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=301884&flag=t
Appears in Collection
ME-Theses_Master(석사논문)
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