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PostPosted: Mon May 11, 2015 10:42 am 

Joined: Mon May 11, 2015 7:46 am
Posts: 1
Hello Guys,

I am trying to import one minute resolution GHI value to PVsyst to estimate PV Power Generation. Is it possible to import the same and find power value at one minute interval?

Thanking You.


PostPosted: Tue May 12, 2015 11:38 am 
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Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1686
PVsyst works on an hourly basis. You can import 1-minute data, but they will be converted into a meteo hourly file *.MET, which is the only basis for PVsyst simulations.

PostPosted: Wed Jan 12, 2022 2:32 am 

Joined: Wed Jan 12, 2022 2:01 am
Posts: 1
I've managed to create a .MEF that allows me to import minute-avg data (GHI, DHI, T_amb, WindVel) for about a month of utility-scale performance test data. I believe that minute-avg data is averaged into it's corresponding hour and then converted into a typical 8760 .MET file. I really wish you could import Albedo, POA & IPOA but the model is then, supposedly, over-constrained and IPOA is not even an option in the .MEF process. It sure would be awesome if PVsyst could allow the program to do one month of minute-avg data (Input & Output). 1440 [min/hr] * 31 [days/mo] = 44640. Essentially, your 8760 capability would be upgraded to 44640 capability. But then you would probably have to rebuild the entire transposition model :o

The best thing you can do with PVsyst is manipulate the data with Python (or excruciatingly with Excel) and feed 60 qty .MET files to PVsyst through a batch process, treating minutes like hours. Then treat hours like minutes and get your data back into a stable format. To do this right, you also have to do a time shift of each .MET file to avoid needing to interpolate between hour-data of the transposition model.

Better luck with NREL SAM :idea:

PostPosted: Fri Jan 14, 2022 11:59 pm 
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Joined: Mon Feb 17, 2020 10:17 pm
Posts: 3
Better luck with pvlib-python! 8-)

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