Kim Byeongtaek, Lee Keonwoo, Ko Kyungnam, Choi Jungchul
Multidisciplinary Graduate School Program for Wind Energy, Jeju National University, 102 Jejudaehakro, Jeju, 63243, South Korea.
Faculty of Wind Energy Engineering, Graduate School, Jeju National University, 102 Jejudaehakro, Jeju, 63243, South Korea.
Sci Rep. 2022 Aug 19;12(1):14179. doi: 10.1038/s41598-022-18447-7.
Long-term offshore wind resource assessment was performed for the offshore site off the Daejeong coast on Jeju Island of South Korea. A jacket type offshore met mast was installed at the site to measure wind and meteorological conditions for 1 year from 1 July 2015 to 30 June 2016. The wind conditions were measured at 32.5 m, 72.5 m and 100.5 m above mean sea level (AMSL). Fundamental wind characteristics such as average wind speed, wind direction frequency, turbulence intensity and so on were analyzed utilizing 1-year wind measurements. In order to correct the limited period of 1-year measurements to long-term conditions, the Measure-Correlate-Predict (MCP) method was applied to estimate 30-year wind conditions using nearby Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) reanalysis data. Also, wind turbine classes suitable for the offshore site were determined based on extreme wind speed estimations and the measured ambient turbulence intensity. Five commercial wind turbines were chosen for estimation of the 30-year annual energy productions (AEPs) and capacity factors (CFs). As a result, it was estimated that the 30-year average wind speed was 7.86 m/s at 100.5 m AMSL. The wind turbine class II rating was estimated to be suitable for enduring extreme wind speed for a return period of 50 years. For the 30-year results, the minimum CF of 30.48% was estimated, while the maximum nearly reached 45%.
对韩国济州岛大静海岸外的近海区域进行了长期海上风能资源评估。在该区域安装了一座导管架式海上气象塔，用于测量2015年7月1日至2016年6月30日这1年期间的风况和气象条件。在平均海平面（AMSL）以上32.5米、72.5米和100.5米处测量风况。利用1年的风测量数据，分析了平均风速、风向频率、湍流强度等基本风特性。为了将1年测量的有限时间段校正为长期条件，应用测量-关联-预测（MCP）方法，使用附近的现代时代回顾性分析研究与应用版本2（MERRA-2）再分析数据来估计30年的风况。此外，根据极端风速估计和实测的环境湍流强度，确定了适合该近海区域的风力发电机组类别。选择了5种商用风力发电机组来估计30年的年发电量（AEP）和容量系数（CF）。结果表明，在100.5米AMSL处，30年平均风速估计为7.86米/秒。估计风力发电机组II级额定值适合承受50年重现期的极端风速。对于30年的结果，估计最小CF为30.48%，而最大值接近45%。
