Adds a script to run sensitivities

[lshaver]

This PR adds a script which runs sensitivities on the model by changing the source year for fuel cost data, the load growth, and the initial demand (a proxy for whether Illinois is a net exporter of electricity).

To run the script, activate the environment and enter:
python sensitivity-script.py

The markdown file details what's being changed and why.

This also makes one small change to plot_results.py. The plot now shows only battery discharge, not the net of discharge and charge.

[pep8speaks]

Hello @lshaver! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2024-09-26 16:04:53 UTC

[samgdotson]

The "changes" I'm requesting are just responses to some of my questions in the review. I think it looks pretty good and although it's not a perfect solution, if it works, I'm OK with it, for now.

In the future, there are ways to conduct sensitivity analyses directly with Snakemake. Here's one example. We should keep this in mind for future projects. Not necessarily for this one.

[samgdotson]

Okay, these changes look good to me! Though, I am writing for posterity that I think it would be better to use Snakemake directly.