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Global Horizontal Irradiation in Castilla-León, Spain: Spatial Estimation Through Interpolation Methods
M.C. Rodríguez-Amigo, M. Díez-Mediavilla, D. Gonzalez-Peña, M. Dieste-Velasco, C. Alonso-Tristán
Solar Radiation, Interpolation Methods
Operation, Performance, Reliability and Sustainability of Photovoltaics
Subtopic: Solar Resource and Forecasting
Event: 32nd European Photovoltaic Solar Energy Conference and Exhibition
Session: 5CV.3.11
2322 - 2326
ISBN: 3-936338-41-8
Paper DOI: 10.4229/EUPVSEC20162016-5CV.3.11
0,00 EUR
Document(s): paper


Four spatial interpolation methods (Inverse Distance Weighting, Spline, Kriging and Natural Neighbor) and their different variations have been employed to map Solar Global Horizontal Irradiation (GHI) in Castilla- Leon, Spain. The interpolation network consists of 71 ground meteorological stations and seven complete years of half hourly data have been used to obtain annual daily averages of GHI. The interpolation results have been tested against data from the four Spanish National Meteorological Agency (AEMET) stations available in the region using standard statistical indicators (RMSE, MBE, MAPE and MAE). An additional partial cross validation of the results has been implemented excluding five stations from the interpolation network attending different criteria to test the results of the interpolation method.