PyPSA-Eur-Sec: Allowed Transmission Line Expansion

[Erik Rathje]

Hello everyone, 

can someone tell me, how exactly 'lv' Parameter from the Scenario section works?

Will the Transmission Lines expanded, if there is a bottleneck between two nodes?

The default Factor for expansion is 50 % (lv=1,5), does that mean, that this is limit for expansion in every considered year?

And what does the option "opt" do?

I couldn't find this information anywhere, so I am thankful for any help.

Best,

Erik

[Tom Brown]

Hi Erik,

There is some documentation here:

https://pypsa-eur.readthedocs.io/en/latest/wildcards.html#the-ll-wildcard

It limits the total expansion of all lines F_l (p_nom_opt) weighted by
the lengths d_l based on the original F^original_l (p_nom):

\sum_l F_l * d_l <= 1.5 * \sum_l F^original_l d_l

such that F_l >= F_original_l.

So lines can be individually expanded, but the total amount of expansion
is limited, so the most welfare increasing expansions are prioritised.

Best,

Tom

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Karlsruhe Institute of Technology (KIT)
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Tom Brown (he/him)
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[Erik Rathje]

Hello Tom,

thank you very much for your answer. 

I compared both Yaml Files (of PyPSA-Eur and Eur-Sec) and thought that ll and lv are different parameters, because the default Value in PyPSa-Eur ist 'copt' and in Eur-Sec '1.0' and '1.5'.

Next time I will read the documentation more precisely.

Thanks for your effort.

Best, 

Erik