Abstract
This study introduces a downscaling method for generating beam, diffuse and global horizontal irradiance based on hour resolution global horizontal irradiance. The study adapts and evaluates the two time-series Markov-chain Mixture distribution model for generating correlated solar irradiance components for downscaling from hour to minute resolution. The model is tested on radiometer data from two climatic regions: Oahu, Hawaii, USA and Norrköping, Sweden. Results show that the downscaled normalized global, beam and diffuse solar irradiance components are statistically similar to the test data for both locations. As a test of universality, the model trained on SMHI data is tested on NREL data and vice versa. It can be concluded that the output time-series are still realistic, but not neccessarily statistically applicable to the specific climatic region. The downscaling method is available at Github JoakimMunkhammar/N2.
Published Version
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