P50/P90 weather files

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spelland74
P50/P90 weather files

Hello,

I am thinking of using the P50/P90 analysis in SAM, and wanted to test it out. Could you point me to the location of the sample files that are already downloaded? Note: I also tried going to the link that is given in the help pages, http://en.openei.org/datasets/node/872, but didn't find the data there.

Best regards,
Sophie

Paul Gilman

Dear Sophie,

The information in that Help topic is out of date. Sorry about that. I need to update the copy of Help that is on this website. The information in the Help that comes with SAM is up to date.

You can download NSRDB 1961-1990 historical data for locations in the United States to test the P50/P90 feature. Each link on that page is to a ZIP file that contains a set of thirty weather files, one for each year from 1961 to 1990. To use the files with SAM, extract the files to a folder, and then go to the P50/P90 page in SAM and select that folder for the P50/P90 runs. See the instrucions in the SAM Help system for more details.

Best regards,

Paul.

spelland74

Hello Paul,

Thanks for your quick and helpful reply, I'll give it a try!

Sophie

spelland74

Followup: I was able to run the P50/P90 analysis. I was wondering: is it possible to access results from individual years, or only the P50/P90 statistics? (My goal was actually to get individual year results).

Paul Gilman

Dear Sophie,

It is not possible to view results from individual years for P50/P90 simulations. You could write an LK script to run the simulations and store results to a CSV file.

For example, we've posted a sample script that shows how to run simulations for a set of weather files stored in a folder, and others that show how to work with CSV files or display data in the time series data viewer.

Best regards,

Paul.

spelland74

Thanks Paul,

The sample script is a very useful tool (I just tried it out with the sample data that you provide). I will definitely have to familiarize myself with the LK scripting - a nice feature!

Sophie

Paul Gilman

As of SAM 2017.9.5, SAM can now automatically download a set of single-year weather files from NREL NSRDB. Here is a short video demonstrating how to do that:

Best regards,
Paul.

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