Offshore Validation of ERA5 Reanalysis with Hub Height Wind Observations of Brazil

Italo Fernandes, F. Pimenta, O. Saavedra, A. R. Silva
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引用次数: 6

Abstract

Wind is a natural resource that has been explored widely in recent years in different regions around the world. In Brazil, the penetration of wind energy represents ~ 11 % of the country's generation capacity, currently explored in continental areas. Although offshore wind projects are in the environmental licensing phase, the country lacks coastal and offshore observations performed at height of modern wind turbines. Atmospheric models have been a valuable tool for the assessing the potential and distribution of offshore wind power. Some reanalysis present hourly datasets with long time record and global coverage. Here the ERA5 atmospheric reanalysis of ECMWF is compared to hub height wind observations of three locations in Brazil. The first is derived from a coastal meteorological tower located on Alcantara Launch Center in the state of Maranhão (MA- Tower). The second is derived from LIDAR observations of a coastal pier in Santa Catarina (SC-LIDAR). The last are tall tower observations performed by a Petrobras oil platform located in Santos Basin (Tower-PETRO). The temporal characteristics of the winds at these locations are explored and compared to ERA5. Power generation is simulated considering a 8 MW offshore wind turbine. Results demonstrate that ERA5 is well suited for daily to monthly scale analysis of wind speeds. The model spatial resolution, however, precludes a close representation of the diurnal variability in locations where the sea breeze is an important component of the circulation. Power simulations demonstrated good results for all ERA5 comparisons.
巴西轮毂高度风观测数据对ERA5再分析的海上验证
风能是一种自然资源,近年来在世界各地得到了广泛的开发。在巴西,风能的渗透率约占该国发电能力的11%,目前在大陆地区进行了探索。尽管海上风电项目正处于环境许可阶段,但该国缺乏在现代风力涡轮机高度进行的沿海和海上观测。大气模型一直是评估海上风力发电潜力和分布的一个有价值的工具。一些再分析提供了具有长时间记录和全球覆盖的每小时数据集。这里ECMWF的ERA5大气再分析与巴西三个地点的枢纽高度风观测进行了比较。第一个来自位于maranh o州Alcantara发射中心(MA- tower)的沿海气象塔。第二个是来自圣卡塔琳娜海岸码头的激光雷达观测(SC-LIDAR)。最后是由位于Santos盆地的Petrobras石油平台(tower - petro)进行的高塔观测。研究了这些地点的风的时间特征,并与ERA5进行了比较。模拟了一台8兆瓦的海上风力涡轮机的发电情况。结果表明,ERA5非常适合于日至月尺度的风速分析。然而,模式的空间分辨率排除了对海风是环流重要组成部分的位置的日变化的密切表示。功率模拟显示了所有ERA5比较的良好结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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