부유식해상풍력 용 동해가스전 환경조건 = Environmental Conditions of Donghae Gas Field for FOWT

다국어 초록 (Multilingual Abstract)

This paper aims to estimate the design values of environmental conditions such as wind, waves, and sea current in the Donghae gas field for the floating offshore wind turbine (FOWT) design specified in the IEC 61400 standard. In this paper, 39-year National Oceanic and Atmospheric Administration (NOAA) long-term hindcast data and 3-year Korea Meteorological Administration (KMA) buoy measured data were used for wind and waves, while 22-year HYbrid Coordinate Ocean Model (HYCOM) data were used for sea currents. The generalized Pareto distribution (GPD), 3-parameter Weibull distribution (W3P) and inverse first order reliability method (IFORM) recommended by DNVGL were used for extreme value analyses. In particular, for significant wave heights of severe sea state (SSS) required in the design load case (DLC) 1.6, it was found that the fitting method recommended by the International Electrotechnical Commission (IEC) was not suitable for these data sets. Therefore, this paper proposes to use a different method to obtain appropriate values. The environmental conditions presented in this study are expected to be useful information for FOWT design and substations to be installed and operated in the Donghae gas field in the future.

참고문헌 (Reference)

1 IEC, "Wind energy generation systems Part 3-2: Design requirements for floating offshore wind turbines, IEC TS 61400-3-2Standard, Edition 1.0, 2019-04"

2 IEC, "Wind energy generation systems Part 3-1: Design requirements for fixed offshore wind turbines, IEC 61400-3-1 Standard, Edition 1.0, 2019-04"

3 IEC, "Wind energy generation systems Part 1: Design requirements, IEC 61400-1 Standard, Edition 4.0, 2019-02"

4 KMA, "Weather data opening portal. Korea Meteorological Administration"

5 Gnedenko, B. V., "Sur la distribution limite du terme maximum D'Une série aléatoire" 44 (44): 423-453, 1943

6 Youngjae Yu, "Response Analysis of MW-Class Floating Offshore Wind Power System using International Standard IEC61400-3-2" 한국해양공학회 34 (34): 454-460, 2020

7 Balkema, A., "Residual life time at great age" 2 (2): 792-804, 1974

8 Moriarty, P. J., "Probabilistic Methods for Predicting Wind Turbine Design Loads" 2003

9 Bommier, E., "Peaks-over-threshold modeling of environmental data" Department of Mathematics, Uppsala University 2014

10 Fisher, R. A., "Limiting forms of the frequency distribution of the largest and smallest member of a sample" 24 (24): 180-190, 1928

11 Shin, H. K., "Introduction to the 1.2 GW Floating Offshore Wind Farm Project in the East Sea, Ulsan, Korea, IEC TC88 MT3-2 (for Revision of IEC 61400-3-2)"

12 Choi, Y. H., "Extreme value analysis of environ-mental data" 181-186, 2016

13 최용호, "Extreme Value Analysis of Statistically Independent Stochastic Variables" 한국해양공학회 33 (33): 222-228, 2019

14 DNVGL, "Environmental conditions and environmental loads, DNVGL-RP-C205"