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A network of all sky imagers (ASI) enabling accurate and high-resolution very short-term forecasts of solar irradiance

Schmidt, Thomas and Stührenberg, Jonas and Blum, Niklas and Lezaca Galeano, Jorge Enrique and Hammer, Annette and Vogt, Thomas (2022) A network of all sky imagers (ASI) enabling accurate and high-resolution very short-term forecasts of solar irradiance. In: 21st Wind & Solar Integration Workshop (WIW 2022), pp. 372-378. Institution of Engineering and Technology. 21st Wind & Solar Integration Workshop (WIW 2022), 12.-14. Okt. 2022, Den Haag. doi: 10.1049/icp.2022.2778. ISBN 978-1-83953-833-9.

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Official URL: https://digital-library.theiet.org/content/conferences/10.1049/icp.2022.2778


The Eye2Sky network is a measurement network in north-western Germany consisting of multiple all-sky imagers (ASI), meteorological and solar irradiance measurements. The network provides high temporal and spatial resolution data for meteorological and especially solar energy related applications. With increasing photovoltaic (PV) capacity in electrical grids fluctuations in solar irradiance due to changing cloud cover may have adverse effects on the grid stability. Within Eye2Sky, new technologies and methodologies facing the demand for more accurate solar irradiance forecasts are being developed. The ASIs used in Eye2Sky record 180° field of view hemispherical sky images from fish-eye lensed cameras. Accompanied with local measurements of solar irradiance components (global, direct and diffuse) a very short-term forecast of the solar resource is possible. These nowcasts provide minutely updated information up to 20 minutes ahead with 1-minute temporal and 50 m x 50 m spatial resolution. This approach shows more precise forecasting results for the next minutes ahead compared to traditional and less detailed methods based on satellite or numerical weather prediction models. In the network, multiple ASIs are used to enlarge the spatial coverage and the forecast horizon requested by many applications. Moreover, the forecast error can be reduced with a network of cameras. In this article, the Eye2Sky network, its research results and applications are introduced.

Item URL in elib:https://elib.dlr.de/194606/
Document Type:Conference or Workshop Item (Speech)
Title:A network of all sky imagers (ASI) enabling accurate and high-resolution very short-term forecasts of solar irradiance
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schmidt, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-3205-2724UNSPECIFIED
Stührenberg, JonasUNSPECIFIEDhttps://orcid.org/0000-0002-3777-2632UNSPECIFIED
Blum, NiklasUNSPECIFIEDhttps://orcid.org/0000-0002-1541-7234UNSPECIFIED
Lezaca Galeano, Jorge EnriqueUNSPECIFIEDhttps://orcid.org/0000-0001-5513-7467UNSPECIFIED
Hammer, AnnetteUNSPECIFIEDhttps://orcid.org/0000-0002-5630-3620UNSPECIFIED
Vogt, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-6268-8694UNSPECIFIED
Journal or Publication Title:21st Wind & Solar Integration Workshop (WIW 2022)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 372-378
Publisher:Institution of Engineering and Technology
Event Title:21st Wind & Solar Integration Workshop (WIW 2022)
Event Location:Den Haag
Event Type:international Conference
Event Dates:12.-14. Okt. 2022
Organizer:Energynautics GmbH
HGF - Research field:Energy
HGF - Program:Energy System Design
HGF - Program Themes:Energy System Transformation
DLR - Research area:Energy
DLR - Program:E SY - Energy System Technology and Analysis
DLR - Research theme (Project):E - Systems Analysis and Technology Assessment
Location: Köln-Porz , Oldenburg
Institutes and Institutions:Institute of Solar Research
Institute of Networked Energy Systems > Energy Systems Analysis, OL
Deposited By: Schmidt, Dr Thomas
Deposited On:19 Apr 2023 10:15
Last Modified:19 Apr 2023 10:15

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