SPLTRAK Abstract Submission
Comparing the Accuracy of Horizon Shade Modelling Based on Digital Surface Models Versus Fisheye Sky Imaging
Daniel Alvarez Mira, Martin Bartholomäus, Sebastian Poessl, Peter B. Poulsen, Sergiu V. Spataru
Technical University of Denmark (DTU), Roskilde, Denmark

Fisheye sky imaging is a well established and accurate method for estimating shading in photovoltaic (PV) applications, however, it requires physical presence and measurements at the studied location. On the other hand, Digital Surface Models (DSM) can be used to estimate horizon shading remotely, and is more scalable for evaluating potential PV installation site more efficiently. Nowadays, high resolution DSM data is more readily available in many countries, especially for urban environments. This has opened up new potential applications for more efficient  shading estimation for aiding the deployment of PV in urban environments where horizon and nearby shading is significant. In this work, the accuracy of DSM methods will be assessed relative to local shaded irradiance measurements and its accuracy compared to that obtained with fisheye imaging based methods.