동해 해상환경조건을 적용한 5-MW 부유식 해상풍력발전시스템의 플랫폼 비교 연구
Comparison of Motion Performances of 5-MW Floating Offshore Wind Turbines Based on East Sea Environmental Conditions
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초록
In this study, we compared the motion performance of a floating offshore wind turbine using South Korea’s East Sea environmental conditions. Numerical simulation was performed using FAST v8 developed by the National Renewable Energy Laboratory (NREL), and the wind turbine model used for numerical analysis was referenced from the NREL 5MW Definition. The comparison was carried out for two types of floats, an OC3-spar and OC4 semi-submersible, composed of the same tower, nacelle, blade, and controller. The comparison was made in Korea’s East Sea environmental conditions, located 50 km away from Ulsan Port with a water depth of 150 m. The length and characteristics of the mooring line were adjusted for each depth by the OC3-spar and OC4 semi-submersible. The environmental data were obtained from the Meteorological Administration’s measured data and NASA’s reanalysis data, MERRA-2. Design load cases were selected by referring to IEC 61400-3. The results were compared with the maximum moment at blade root and tower base. Also, the six-degree-of-freedom motion and three mooring line tension were compared. From the comparison results, the characteristics of each platform were confirmed.
Abstract
In this study, we compared the motion performance of a floating offshore wind turbine using South Korea’s East Sea environmental conditions. Numerical simulation was performed using FAST v8 developed by the National Renewable Energy Laboratory (NREL), and the wind turbine model used for numerical analysis was referenced from the NREL 5MW Definition. The comparison was carried out for two types of floats, an OC3-spar and OC4 semi-submersible, composed of the same tower, nacelle, blade, and controller. The comparison was made in Korea’s East Sea environmental conditions, located 50 km away from Ulsan Port with a water depth of 150 m. The length and characteristics of the mooring line were adjusted for each depth by the OC3-spar and OC4 semi-submersible. The environmental data were obtained from the Meteorological Administration’s measured data and NASA’s reanalysis data, MERRA-2. Design load cases were selected by referring to IEC 61400-3. The results were compared with the maximum moment at blade root and tower base. Also, the six-degree-of-freedom motion and three mooring line tension were compared. From the comparison results, the characteristics of each platform were confirmed.
참고문헌 (13)
- 2016 New & Renewable energy white paper, "Korea New & Renewable Energy Center", 110~116, pp.Knrec (2016), 11-1410000-001321-11
- FAST User’s Guide, "Jonkman, J. M.", National Renewable Energy Laboratory, ~, pp.NREL (2005), TP-500-38230
- 김현구, "재해석자료를 이용한 전지구 풍력자원의 장기간 통계분석", 풍력에너지저널, 9(3), pp.19~24 (2018), 한국풍력에너지학회[DOI]
- IEC, "Wind turbine Part 1: Design Requirements, IEC 61400-1 Standard", International Electrotechnical Commission, ~ (2005)
- IEC, "Wind turbines – Part 3: Design Requirements for offshore wind turbines, IEC 61400-3 Standard", International Electrotechnical Commission, ~ (2009)
- Lee, S. W., "The korea coastal area" (1992), Jipmoon
- Definition of a 5-MW Reference Wind Turbine for Offshore System Development, "Jonkman, J.", National Renewable Energy Laboratory, ~, pp.NREL (2009), TP-500-38060
- Definition of the Floating System for Phase IV of OC3, "Jonkman, J.", National Renewable Energy Laboratory, ~, pp.NREL (2010), TP-500-47535
- Definition of the Semisubmersible Floating System for Phase II of OC4, "Robertson, A. N.", National Renewable Energy Laboratory, ~, pp.NREL (2014), Tp-5000-60601
- Offshore Standard – Offshore mooring chain, "DNV GL", ~, pp.DNVGL-OS-E302 (2015)
- Coulling, A. J., "Importance of Second-Order Difference-Frequency Wave-Diffraction Forces in the Validation of a FAST Semi-Submersible Floating Wind Turbine Model", 2013 32nd Conference on Ocean, Offshore and Arctic Engineering (2013)
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- Robertson, A. N., "Loads analysis of several offshore floating wind turbine concepts", Proc. 21st Int. Offshore Polar Eng. Conf., pp.443~450 (2011)