A variety of methods developed on the basis of the combination of radiation transmission theory and observations can convert satellite measurements into downward solar irradiance.
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1. cloud layerThe main problem facing short-term solar forecasting is to predict the evolution of clouds. The evolution of the cloud layer itself is very
At present, there are many satellite monitoring systems and satellite environmental products with great value in solar energy prediction and resource assessment. Satellite measurements with
In recent years, both rooftop distributed and large-scale centralized solar power generation have achieved rapid development. For grid operators, the ideal power supply should have
① Use ground measurement to calibrate satellite biasAlthough the satellite data of a certain location can only guarantee that the average irradiance deviation during the
In order to ensure the accuracy of the monitoring model, the use of ground-measured data is an important step in the data calculation process. It
Uncertainty (error risk) is determined by both astronomical and geographic factors. The sun’s altitude angle (which affects the quality of the atmosphere) is also an
①Calculation of total irradiancePer Schmetz pointed out that Cl should be proportional to the total clear sky index kt=GHI/GHIclear. A linear relationship is used in
① Non-uniform terrainIn coastal areas and some other arid areas, the ground albedo may change drastically within a relatively small range. Although today’s satellite navigation
Cloud extinction can be calculated directly using satellite information. The calculation process includes determining the cloud index (CI) according to the satellite imager and its