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I've done some of the pvlib tutorials, but at this moment I would like to calculate the pv power based on a database, which only has global horizontal irradiance.

The data looks as follows:

enter image description here

Also wind speed and temperature data are available.

I was wondering how I can calculate the direct normal irradiance (dni) and the diffuse horizontal irradiance (dhi) from this data, since I can't find any documentation on this topic. If I have the dni and dhi I can calculate my pv power from there using pvlib functions.

The data shown above is from Amsterdam:

lat: 52.37

lon:4.895

tz: 'Europe/Amsterdam'

Hoekieee
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1 Answers1

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Use one of the DNI estimation models.

Will Holmgren
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  • Link is dead now. Please try ERBS function : https://pvlib-python.readthedocs.io/en/stable/reference/generated/pvlib.irradiance.erbs.html?highlight=erbs#pvlib.irradiance.erbs – JulienV Sep 29 '22 at 14:42