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Temporal-resolution cascade model for separation of 1-min beam and diffuse irradiance

Abstract:

The procedure for splitting beam and diffuse components from the global radiation is known as separation modeling. Since the separation of irradiance components is required in a range of solar applications, hundreds of models with various complexities have been proposed in the literature. In this work, a new modeling philosophy, called the temporal-resolution cascade (TRC), is presented. The working principle of TRC models is to use low-resolution diffuse fraction estimates as input of a 1-min model. Based on a preliminary study, using two years (2019-2020) of data from seven locations, it is found that the TRC models are able to outperform most, if not all, existing separation models. All code and data are released for reproducibility.