Importing measured data file

Ivan
Topic Author

03 Nov 2022 13:06 #11646 by Ivan

Importing measured data file was created by Ivan

Hello,

can anyone tell me if I can import data file and run simulation without having some of the climate parameters available (wind direction, snow depth, Tdew) and if yes which data are obligatory to have and which are not?

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Paul Gilman

03 Nov 2022 17:34 #11650 by Paul Gilman

Replied by Paul Gilman on topic Importing measured data file

Hi Ivan,

See the SAM Help topic "Weather Data Elements:"

samrepo.nrelcloud.org/help/weather_data_elements.htm

The "Weather File Formats" chapter has descriptions of weather file formats for SAM's solar, wind, and marine energy models:

samrepo.nrelcloud.org/help/weather_format.htm

Best regards,
Paul.

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Ivan
Topic Author

30 Jan 2023 08:20 #11882 by Ivan

Replied by Ivan on topic Importing measured data file

Thank you for your answer. I have searched those documents, but I could not find this answer to this question: Is there a possibility to add only GHI to the weather file or I must have at least DHI or DNI also?

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Paul Gilman

31 Jan 2023 00:27 #11887 by Paul Gilman

Replied by Paul Gilman on topic Importing measured data file

Hi Ivan,

The table in the Weather Data Elements Help topic that I linked above shows that for the PV models, you need at least two of DNI, DHI, and GHI.

Use the options at the bottom of the Location and Resource page under "Albedo - Sky Diffuse Model - Irradiance Data (Advanced)" to choose which two components you want to use from the weather file:

Best regards,
Paul.

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Cia

02 Feb 2023 16:11 #11892 by Cia

Replied by Cia on topic Importing measured data file

That's awesome Paul,
Is this feature also available for PVWatts (as opposed to Photovoltaics)? I don't see it in the SAM UI and I couldn't get a reasonable output via PySAM either...
Thanks!

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Paul Gilman

03 Feb 2023 23:54 #11899 by Paul Gilman

Replied by Paul Gilman on topic Importing measured data file

Hi Cia,

PVWatts does not support the option to choose irradiance components: It requires a weather file with DNI and DHI components.

That option is only available for the Detailed PV model in SAM, Pvsamv1 in PySAM, or pvsamv1 in the SSC API.

Best regards,
Paul.

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Importing measured data file

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