`s_nom=0` values from TAMU

[trevorb1]

Version Checks (indicate both or one)

• This bug exists on the master branch of PyPSA-USA.

• This bug exists on the develop branch of PyPSA-USA.

The Issue

When the TAMU network is imported, there is this conditional:

pypsa-usa/workflow/scripts/build_base_network.py

Lines 74 to 79 in 338af99

	branches = pd.read_csv(
	fn_branches,
	dtype={"from_bus_id": str, "to_bus_id": str},
	index_col=0,
	).query("from_bus_id in @n.buses.index and to_bus_id in @n.buses.index")
	branches.loc[branches.rateA == 0, "rateA"] = 0.01

However, s_nom = 0 should represent unconstrained lines? This is from the TAMU datapackage.

{
    "name": "rateA",
    "description": "MVA rating A (long term rating), set to 0 for unlimited",
    "type": "float"
},

Shouldn't this conditional go the other way, and the s_nom=0 lines should be replaced with very large s_nom values?

Steps To Reproduce

No response

Error Message

Anything else?

No response