Inter System Time Lag due to Clouds in an Urban PV Ensemble

Abstract

CONTEXT •In situ determination of cloud transit time lag on reconstructed Global Horizontal Irradiance (GHI) and the use of this time lag for short-term irradiance forecasting. •Part of project: Solar Forecasting & Smart Grids: aimed at improving the hosting capacity for PV in the Dutch LV/MV grid.

SUMMARY / CONCLUSION •Reliable determination of time lag •No external meteorological data needed. •Straight forward forecasting method: no “Black box” methods as e.g. Artificial Neural Networks.