Fabian Neumann comments

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                                            Fabian Neumann

Add marginal cost lines and transformers

> [major, conceptual]: In optimization models, transmission prices are typically captured through shadow prices from network constraints (ie costs are implicitly captured in the objective, not through explicit marginal costs)....

Networks statitics (i)plot refactor

Strong support for automatic carrier management!

Add SALib global sensitivity analysis example

@amanmajid, yes, I put together a short notebook (https://github.com/PyPSA/PyPSA/pull/1318/files) but it's just a plain low-discrepancy sampling and finding Sobol indices based on uncertain wind, solar, battery and electrolysers.

allow start-up and shut-down cost to be time-varying

Thanks for pointing that out!

Use `n.shapes` geometries for lines in `n.plot.map()` if available

Would be quite cool! Also shapes for the catchment areas of buses could be plotted directly from `n.plot.map()`. Like this:

Comprehensive Workflows with potential outsources functionality

There used to be a proposal for switches: https://github.com/PyPSA/PyPSA/pull/137

Contingency finder helper function

The function is quite helpful! Thanks for contributing it! Now, the remaining question is how to use it. Perhaps it could be called at the beginning of `calculate_BODF()` and even...

Contingency finder helper function

Yes, let's do that. Thanks!