pypsa-earth
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pypsa-meets-earth
Avoid rebase?
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PyPSA-Earth will lift all voltages before the optimization to a base voltage e.g. 380kV
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Before the optimization, we rebase (see function) the voltage to different classes e.g. random example: 110-330kV is class 220kV, 330-550kV is class 380kV such that we can assign physical parameters from the config.yaml. The question is if we can actually avoid it? I think what we need for that would be a line database with the linetype, typical voltage and physical parameters. PyPSA has already a typical line database, which we could extend by a column "voltage" to allocate data automatically. My suggestion is to store this voltage column extended line-type database in PyPSA-Earth (one voltage has one line type) such that we can avoid the rebase.
A there is detailed analysis of what effect does the voltage rebase have on the transmission capacity: https://github.com/GbotemiB/documentation/blob/it_de_comparison/notebooks/validation/it_de_comparison_notebook.ipynb
A long story short, it looks like we overestimate transmission capacity when mapping lower voltage lines into lines with a higher "standard" threshold value. But it would be perfect to have a professional comment from the perspective of electrical engineering. @davide-f could you please give your view on that matter?
Hello @pz-max! I have a feeling that this issue could have been fixed with #999, which basically implements the ideas you sketched in this issue. Could you please check if any other points left?