干旱区生态环境知识资源中心(Arid): High-resolution estimates of diffuse fraction based on dynamic definitions of sky conditions

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DOI	10.1016/j.renene.2021.01.066
	High-resolution estimates of diffuse fraction based on dynamic definitions of sky conditions
	Hassan, Muhammed A.; Akoush, Bassem M.; Abubakr, Mohamed; Campana, Pietro Elia; Khalil, Adel
通讯作者	Hassan, MA (corresponding author), Cairo Univ, Fac Engn, Mech Power Engn Dept, Giza 12613, Egypt.
来源期刊	RENEWABLE ENERGY
ISSN	0960-1481
EISSN	1879-0682
出版年	2021
卷号	169 页码:641-659
英文摘要	Accurate monitoring and operation of solar power systems require high-resolution solar radiation measurements and precise separation models. This study aims to improve the accuracy of classic diffuse fraction-clearness index piecewise separation models by applying data-driven classifications of sky conditions. This is achieved through a novel outlier-insensitive clustering algorithm and shape prescriptive modeling, applied to 1-, 10-, 30-, and 60-min ground measurements from 4 different locations in the MENA region. This study shows that classifications of sky conditions are not uniform among the selected locations even though all stations fall in the arid desert climate category. This highlights the importance of extracting the sky conditions from measurements rather than using available classifications in the literature. The selection of the number of clusters has to undergo optimization. The number of clusters is also a function of the time resolution. One of the selected locations shows four optimal clusters for 1-min data and six clusters for 60-min data. All developed piecewise separation models show high accuracy and stability with the mean bias errors approaching zero values and the mean absolute errors ranging between 8.7 and 11.8%. The models also outperform existing ones and have good generalization capabilities under the same climate classification. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	Solar radiation Diffuse horizontal irradiance Diffuse fraction One-minute observations K-medoids clustering Piecewise model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000621819400009
WOS类目	Green & Sustainable Science & Technology ; Energy & Fuels
WOS研究方向	Science & Technology - Other Topics ; Energy & Fuels
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351558
作者单位	[Hassan, Muhammed A.; Akoush, Bassem M.; Khalil, Adel] Cairo Univ, Fac Engn, Mech Power Engn Dept, Giza 12613, Egypt; [Abubakr, Mohamed] Cairo Univ, Fac Engn, Mech Design & Prod Engn Dept, Giza 12613, Egypt; [Campana, Pietro Elia] Malardalen Univ, Future Energy Ctr, Sch Business Soc & Engn, S-72123 Vasteras, Sweden
推荐引用方式 GB/T 7714	Hassan, Muhammed A.,Akoush, Bassem M.,Abubakr, Mohamed,et al. High-resolution estimates of diffuse fraction based on dynamic definitions of sky conditions[J],2021,169:641-659.
APA	Hassan, Muhammed A.,Akoush, Bassem M.,Abubakr, Mohamed,Campana, Pietro Elia,&Khalil, Adel.(2021).High-resolution estimates of diffuse fraction based on dynamic definitions of sky conditions.RENEWABLE ENERGY,169,641-659.
MLA	Hassan, Muhammed A.,et al."High-resolution estimates of diffuse fraction based on dynamic definitions of sky conditions".RENEWABLE ENERGY 169(2021):641-659.