Nowcasting Irradiance and Wind With Free Data

Radar, Satellite and Numerical Weather Prediction Glance Into the Future

Abstract

All solar power plants are exposed to variable weather conditions. The key variables are irradiance, wind, and precipitation. These meteorological phenomena can challenge operations and structural integrity alike. Short-term foresight allows to react pre-emptively and in time: Even systems which take several minutes can reach a safe stow position or adapt the temperature of the receiver. Using only local weather data limits the available time to react and appropriateness of measures taken. In this paper publicly available data sources are presented that can help to ensure safe operation and increase yield.