소형 수직축 풍력터빈에 대한 동특성 분석 및 동적모델 수정

• 영문명: Dynamic Characteristics Analysis and Dynamic Model Modification on a Small Scale Vertical Axis Wind Turbine
• 발행기관: 한국연안방재학회
• 저자명: 이진학(Jin Hak Yi) 김원술(Won sul Kim) 한택희(Taek Hee Han) 임승률(Sung yul Yim)
• 간행물 정보: 『한국연안방재학회지』제4권 제2호, 85~92쪽, 전체 8쪽
• 주제분류: 사회과학 > 사회과학일반
• 파일형태: PDF
• 발행일자: 2017.04.30

영문 초록

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.

목차

Abstract

1. 서론

2. 추계론적 부공간 규명법

3. 동적모델 수정 전 풍력터빈 구조물의 동특성 평가

4. 동적모델 수정 후 풍력터빈 구조물의 동특성 평가

5. 결론

감사의 글

References

키워드

vertical axis wind turbine dynamic characteristics analysis dynamic model modification stochastic subspace identification resonance