Determination of Cloud Motion Applying the Lucas-Kanade Method to Sky Cam Imagery
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2020-08-16Resumen
The atmospheric conditions existing where concentrated solar power plants (CSP) are installed need to be carefully studied. A very important reason for this is because the presence of clouds causes drops in electricity generated from solar energy. Therefore, forecasting the cloud displacement trajectory in real time is one of the functions and tools that CSP operators must develop for plant optimization, and to anticipate drops in solar irradiance. For short forecast of cloud movement (10 min) is enough with describe the cloud advection while for longer forecast (over 15 min), it is necessary to predict both advection and cloud changes. In this paper, we present a model that predict only the cloud advection displacement trajectory for different sky conditions and cloud types at the pixel level, using images obtained from a sky camera, as well as mathematical methods and the Lucas-Kanade method to measure optical flow. In the short term, up to 10 min the future position of the cloud fro...
Palabra/s clave
cloud detection
digitized image processing
solar irradiance estimation
solar irradiance forecasting
solar energy
sky camera
tracking cloud motion
Lucas Kanade
optic flow
remote sensing