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Ground Measured Data Vs Meteo-Data Sets
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Overview

An insightful article to read on the comparison of Actual Global Tilt Radiation (AGTI) of 57 sites from operational solar power projects spread across India 

Gensol had collected Actual Global Tilted Irradiation (AGTI) of 57 sites from operational projects spread across India. It was then correlated with Expected Global Tilted Irradiation (EGTI) from the following meteo-databases namely:
 
  • Meteonorm-7.2
  • SolarGIS
  • NASA (National Aeronautics and Space Administration)
  • NREL (National Renewable Energy Laboratory)
Key Takeaways for Stakeholders
 
  • Analysis carried on EGTI as month on month GHI to GTI gain (%) is following a similar trend for all sites and meteo-databases considered. 
  • Month-wise AGTI values are correlated with month-wise EGTI P50 values for North. East, West & South zones. 
  • Annual AGTI values are correlated with annual EGTI P50 & P75 values.

a) Annual Solar Radiation Correlation – Sites in %

b) Annual Solar Radiation Deviation – Sites in %

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