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Article dans une revue

Validation of spatially resolved all sky imager derived DNI nowcasts

Abstract : Mainly due to clouds, Direct Normal Irradiance (DNI) displays short-term local variabilities affecting the efficiency of concentrating solar power (CSP) plants. To enable efficient plant operation, DNI nowcasts in high spatial and temporal resolutions for 15 to 30 minutes ahead are required. Ground-based All Sky Imagers (ASI) can be used to detect, track and predict 3D positions of clouds possibly shading the plant. The accuracy and reliability of these ASI-derived DNI nowcasts must be known to allow its application in solar power plants. Within the framework of the European project DNICast, an ASI-based nowcasting system was developed and implemented at the Plataforma Solar de Almería (PSA). Its validation methodology and validation results are presented in this work. The nowcasting system outperforms persistence forecasts for volatile irradiance situations.
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Soumis le : lundi 17 juillet 2017 - 11:05:46
Dernière modification le : jeudi 24 septembre 2020 - 17:20:10
Archivage à long terme le : : samedi 27 janvier 2018 - 01:12:11


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Pascal Kuhn, Stefan Wilbert, David Schüler, Christoph Prahl, Thomas Haase, et al.. Validation of spatially resolved all sky imager derived DNI nowcasts. AIP Conference Proceedings, American Institute of Physics, 2017, SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems, 1850 (1), pp.140014. ⟨10.1063/1.4984522⟩. ⟨hal-01553607⟩



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