Satellite images are routinely processed to yield information on clouds properties. The Copernicus Atmosphere Monitoring Service (CAMS) offer access to properties of the cloudless atmosphere every 3h. These sets of information are combined together with site-specific properties, e.g. elevation and shadowing by local relief, to produce estimates of the solar radiation at a given site. Thus, the computation is made on an ad hoc basis on-the-fly. To better account for changes in solar position and possible shadowing effects, computations of the solar radiation are made every 1 min and the results are then aggregated e.g. every 15 min or 1 h, chosen by the user. The operations that are currently working satisfactorily through improvements should be brought to ease access to data by users. A new use case has arisen recently due to the large penetration of PV plants in Europe. Grid operators need a better knowledge of the very local production of electricity by PV plants that are connected to the grid in order to ensure the stability and quality of the electricity delivered to customers. Accordingly, their requests are for time-series of solar radiation over a regular grid of points covering their area of interest which may be nation-wide. Though the time-series may be short, e.g. two days of estimates every 15 min, the number of grid nodes may be high. An area of say 1000 km x 1000 km with a grid cell of 10 km in size means running the model for 10 000 nodes at the same time. The concept of cloud computing supporting the NexGEOSS infrastructure may help in solving this issue in both computational aspects and dissemination aspects.
Energy – Grid Operations
Constructing Gridded Data for Grid Operations
Testimonial by Philippe Blanc, Professor at MINES ParisTech
Geographical coverage of the CAMS radiation product: field-of-view of the Meteosat satellite, roughly speaking Europe, Africa, Atlantic Ocean, Middle East (-66° to 66° in both latitudes and longitudes).
CAMS (Copernicus Atmosphere Monitoring Service) Radiation product from a one year time period including the following parameters (Atmosphere optical properties, Ground reflectance, Cloud optical properties, Atmosphere radiative transfer).
Grid operators that need to ensure the stability and quality of the electricity delivered to customers. Electricité De France (EDF) is our prime user. In course of the projects, this pilot will also contact grid operators in Germany with the help of research institutions namely University of Ulm und IWES (Fraunhofer-Institut für Windenergie und Energiesystemtechnik IWES) in addition to other companies. This pilot will also contact organisations such as FAO, JRC, and others, who show a clear need for these tools. The pilot will be promoted inside GEOGLAM which can benefit significantly.
A WPS (Web Processing Service) providing access to gridded forms of solar radiation based information requested by users.
Learn more about the pilot results at NextGEOSS Catalogue/Thematic Areas/Energy. You can explore the pilot data sets at Constructing Gridded Data for Grid Operations Pilot outputs.