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해양환경이 해상풍력발전기의 하중에 미치는 영향에 대한 연구

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Alternative Title
A study on the Load of the Offshore Wind Turbine under Ocean Environmental Loads
Abstract
Increasing energy demand coupled with pollution free production of energy has found a viable solution in wind energy.
Land based windmills have been utilized for power generation for more than two thousand years. In modern times wind generated power has become popular in many countries. Offshore wind turbines are being used in a number of countries to tap the energy from wind over the oceans and convert to electric energy. The advantages of offshore wind turbines as compared to land are that offshore winds flow at higher speed than onshore winds and the more available space. In some land based settings, for better efficiency, turbines are separated as much as 10 rotor diameters from each other.
Among all the components of offshore wind turbines, the foundation and tower play a key role in the stability of whole system because it is the most affected by complex environmental conditions such as the wind, wave, current, tidal etc. And the foundation cost is a larger percentage of the overall cost structure for the offshore wind turbine system. This thesis is aimed to investigate the wave effect on the wind turbine system. The 5MW NREL reference wind turbine with the monopile foundation is chosen for the load calculation. Various wave load cases are applied on the offshore wind turbine system to evaluate stability and economy. Wind and wave loads are calculated using the FAST CODE software. Quantitative and qualitative analyse are performed. This work is to simulate systematic and optimized load cases for wind turbine system.
Author(s)
김대영
Issued Date
2012
Awarded Date
2012. 8
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000006082
Alternative Author(s)
Kim, DaeYoung
Affiliation
제주대학교
Department
대학원 풍력특성화협동과정
Advisor
김상재
Table Of Contents
I. 서론 1

II. 해석도구 및 이론 5

2.1 해석도구 5
2.1.1 FAST CODE 6
2.1.2 TurbSim v1.50 9

2.2 풍 하중 11
2.2.1 풍속분포 11
2.2.2 정상 풍속 프로파일 모델 (Normal Wind Speed Profile Model) 12
2.2.3 정상난류모델 (Normal Turbulence Model) 12
2.2.3 극치풍속조건 (Extreme Wind Condition) 13
2.2.3.1 극치풍속모델(Extreme Wind Speed Model) 13
2.2.3.2 극치난류모델(Extreme Turbulence Model) 14

2.3 파랑 하중 15
2.3.1 Pierson-Moskowitz 스펙트럼 (PM) 15
2.3.2 Jonswap 스펙트럼 (JS) 16



III. 연구방법 18

3.1 해석 수행 풍력 발전기 모델 20

3.2 풍속조건 23
3.2.1 정상풍속 프로파일 모델 (NWP) 23
3.2.2 정상난류모델 (NTM) 24

3.3 해양 조건 25
3.3.1 파고의 영향(Wave Height Effect) 25
3.3.2 파 주기의 영향(Wave Period Effect) 25
3.3.3 수심의 영향 (Wave Load Effect of Different Water Depth) 25

3.4 하중측정 위치 26


IV. 결과 및 고찰 27

4.1 수심의 영향 27
4.2 규칙파와 불규칙파의 비교 33
4.3 파고 영향 (Wave Height) 36
4.4 파주기의 영향 41

V. 결론 46

참고 문헌 48
Degree
Master
Publisher
제주대학교 대학원
Citation
김대영. (2012). 해양환경이 해상풍력발전기의 하중에 미치는 영향에 대한 연구
Appears in Collections:
General Graduate School > Multidisciplinary Graduate School Program for Wind Energy
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