소형 수직축 풍력터빈에 대한 동특성 분석 및 동적모델 수정 KCI OTHER

Title
소형 수직축 풍력터빈에 대한 동특성 분석 및 동적모델 수정
Alternative Title
Dynamic Characteristics Analysis and Dynamic Model Modification on a Small Scale Vertical Axis Wind Turbine
Author(s)
이진학; 김원슬; 한택희; 임승률
KIOST Author(s)
Yi, Jin Hak(이진학)Han, Taek Hee(한택희)
Publication Year
2017-04
Abstract
The dynamic characteristics including natural frequencies and excitation frequencies were evaluated for a small 10 kW vertical axis wind turbine for investigating the root cause of excessive vibration of a structure under 30RPM of rotor speed. Acceleration responses were measured at 12 distributed locations for ambient vibration tests during non-operational and operational conditions. The natural frequencies for the lowest 2 bending modes were estimated and the excitation frequencies, i.e. 1P, 2P, 4P, were also estimated according to the rotational speed using the responses under operational conditions (i.e. power generation condition). It was verified that the excessive vibration was due to the resonance between the 4P excitation and the 1st vibration modes. To resolve the resonance issue, dynamic model modification was carried out and concrete filling inside the steel tower up to 7 m height was the most efficient way to increase the 1st natural frequency about 20% by numerical simulation. After the concrete filling, the acceleration responses were measured again and it was observed that the 1st natural frequency was increased as amount of 21% by concrete filling.
ISSN
2288-7903
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2063
DOI
10.20481/kscdp.2017.4.2.85
Bibliographic Citation
한국연안방재학회지, v.4, no.2, pp.85 - 92, 2017
Publisher
(사)한국연안방재학회
Keywords
vertical axis wind turbine; dynamic characteristics analysis; dynamic model modification; stochastic subspace identification; resonance
Type
Article
Language
Korean
Publisher
(사)한국연안방재학회
Related Researcher
Research Interests

Ocean Energy-Tidal Current Energy Converter System,Infrastructure Management-Structural Health Monitoring,Offshore Wind,해양에너지-조류발전시스템,시설물 유지관리-구조건전성 평가,해상풍력

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