Determination of the sun area in sky camera images using radiometric data

被引：17

作者：

Alonso, J. ^{[1
,2
]}

Batlles, F. J. ^{[1
,2
]}

Villarroel, C. ^{[3
]}

Ayala, Rosa ^{[4
]}

Burgaleta, J. I. ^{[5
]}

机构：

[1] Univ Almeria, Dept Chem & Phys, Almeria 04120, Spain

[2] Joint Ctr Univ Almeria CIEMAT, CIESOL, Almeria 04120, Spain

[3] Univ Tarapaca, Sch Elect Elect Engn, Arica, Chile

[4] Univ Almeria, Appl Comp Grp, Almeria 04120, Spain

[5] Torresol Energy Investments SA, Getxo 48930, Vizcaya, Spain

来源：

ENERGY CONVERSION AND MANAGEMENT | 2014年 / 78卷

关键词：

Total sky imagery; Sun area; Saturation of pixels; Solar radiation; GLOBAL SOLAR-RADIATION; CLOUD DETECTION; MODELS; CLASSIFICATION; IRRADIATION;

D O I：

10.1016/j.enconman.2013.10.050

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Due to the increasing development and expansion of solar power plants, it is necessary to have complete and absolute knowledge of all factors and occurrences that can affect the dynamics and quality of their production. The importance of clouds in the attenuation of solar radiation is a transcendental and decisive factor in the incident energy from the sun. Detecting clouds with sky cameras is a very problematic issue. The captured solar area in the images exhibits a pronounced saturation of pixels as a consequence of sunlight penetration and the appearance of various atmospheric features. The present article reports a methodology based on radiometric data that is used to determine the causes of saturation in the solar zone and its vicinity on images from a TSI-880 model sky camera. The correct method identifies the presence or absence of clouds in the saturated zone with 92% success. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：24 / 31

页数：8

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