[Feature]: Asymmetric Transmission

[JosieCharles]

Feature description

We would like to be able to have asymmetrical transmission, meaning (for example) the transmission from region A to B might be able to have a max capacity of 100 and region B to A might have a max capacity of 50 or 0. Currently, there is a Line_Min_Flow_MW that doesn't appear to actually get used in the model.

Motivation

No response

Implementation strategy

No response

Additional context

No response

[sambuddhac]

PR #789 addresses this. Still some little bit of bug to smash in the multi-stage code. But the single stage should be working fine.