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New. Renew. Energy

[ Article ]
New & Renewable Energy
Abbreviation: New. Renew. Energy
ISSN: 1738-3935 (Print) 2713-9999 (Online)
Online publication date 21 Dec 2021
Received 20 Aug 2021 Revised 21 Dec 2021 Accepted 05 Dec 2021
DOI: https://doi.org/10.7849/ksnre.2021.0022

재해석자료를 이용한 한반도 해상의 기준풍속 추정
김현구1), * ; 김보영2) ; 강용혁3) ; 하영철4)

Estimation of Reference Wind Speeds in Offshore of the Korean Peninsula Using Reanalysis Data Sets
Hyun-Goo Kim1), * ; Boyoung Kim2) ; Yong-Heack Kang3) ; Young-Cheol Ha4)
1)Principal Researcher, Chief, New & Renewable Energy Resource Map Laboratory, Korea Institute of Energy Research
2)Senior Researcher, New & Renewable Energy Resource Map Laboratory, Korea Institute of Energy Research
3)Principal Researcher, New & Renewable Energy Resource Map Laboratory, Korea Institute of Energy Research
4)Professor, School of Architecture, Kumoh National Institute of Technology
Correspondence to : *hyungoo@kier.re.krTel: +82-42-860-3376


© 2021 by the New & Renewable Energy
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To determine the wind turbine class in the offshore of the Korean Peninsula, the reference wind speed for a 50-y return period at the hub height of a wind turbine was estimated using the reanalysis data sets. The most recent reanalysis data, ERA5, showed the highest correlation coefficient (R) of 0.82 with the wind speed measured by the Southwest offshore meteorological tower. However, most of the reanaysis data sets except CFSR underestimated the annual maximum wind speed. The gust factor of converting the 1 h-average into the 10 min-average wind speed was 1.03, which is the same as the WMO reference, using several meteorological towers and lidar measurements. Because the period, frequency, and path of typhoons invading the Korean Peninsula has been changing owing to the climate effect, significant differences occurred in the estimation of the extreme wind speed. Depending on the past data period and length, the extreme wind speed differed by more than 30% and the extreme wind speed decreased as the data period became longer. Finally, a reference wind speed map around the Korean Peninsula was drawn using the data of the last 10 years at the general hub-height of 100 m above the sea level.


Keywords: Offshore wind energy, Reference wind speed, Wind turbine class, Reanalysis data, Gumbel distribution, Gust factor
키워드: 해상풍력, 기준풍속, 풍력터빈등급, 재해석자료, 검벨분포, 돌풍계수