how to read the network from folder

[boba boba]

Hi ,

i have folder that contains buses , carriers , generators , generator-p_max_pu , lines , loads ,loads-p_set , snapshots, storage_units , transformers .

i have used this function to import the data from folder

network = pypsa.Network()
network.import_from_csv_folder(foldername)

but i have found after finishing modelling ,that i do not have any output for loads-p_set  , he did not consider it so i have the output folder same as input , i think so

my question : how could i read the data that changing with snapshots from files loads-p_set.csv  and also the data in generator-p_max_pu.csv 

thanks in advance

[Johannes Hampp]

Hi there,

Reading and writing to file are independent operations.

After your model exercise you need to save your results to file, else
they will not change.

Use export_to_csv_folder(...) or export_to_netcdf(...) for saving your
results, see here: https://pypsa.readthedocs.io/en/latest/import_export.html


Best,
Johannes

Best regards,
Johannes Hampp (he/him)

Justus Liebig University Giessen (JLU)
Center for international Development and Environmental Research (ZEU)

mailto: johanne...@zeu.uni-giessen.de

Senckenbergstr. 3
DE-35392 Giessen
https://uni-giessen.de/zeu

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[boba boba]

Hi , could i ask which files should i see at output folder ?

sry , i am so new in pypsa and i owuld like to learn .

and i did it already export_to_csv_folder(...)  but i mean , i have at output folder the same data as input except only investment period file and it seems empty,it has only 2 columns objective and years but both of them is empty and also new file storage_units state of charge and  i found inside it the storage name but , all columns has zero values and file called network ,it has max_memusaga column and has only one valze inside it at first row .

what is memusaga and what should be wrong at my model

thanks for help

[Johannes Hampp]

Hi there,

as described in the documentation:

https://pypsa.readthedocs.io/en/latest/api_reference.html#pypsa.Network.export_to_csv_folder

You will see files for all components and time-dependent series if they
have non-default values after the model was run.

investment periods is part of the pathway optimization feature. If you
don't use the feature the file is empty.
The same thing happens for component types which you don't use in your
model: If you don't use them, then an empty file will exist with the
component name as file name (e.g. storage units).

Best,
Johannes

Best regards,
Johannes Hampp (he/him)

Justus Liebig University Giessen (JLU)
Center for international Development and Environmental Research (ZEU)

mailto: johanne...@zeu.uni-giessen.de

Senckenbergstr. 3
DE-35392 Giessen
https://uni-giessen.de/zeu

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