Illinois 200 Bus + WECC 240 Bus + IEEE ISONE

[lukelowry]

Description

Adds the Illinois 200 bus case and WECC 240 bus case, and finishes the implementation and documentation of the IEEE New England ISO 39 bus case. Depends on #373 deeply for verification and case data parsing.

I should note that at this point, GridKit is dramatically outperforming PowerWorld. In some instances, it solved nearly 4x faster.

Closes #357

Proposed changes

• WECC 240 Case and solver file
• Illinois 200 Case and solver file
• IEEE 39 Bus finalize
• Polish Texas case docs and examples
• Polish Hawaii case docs and examples
• Small tweak to IEEEST to handle some zero-valued parameters in stabilizer I did not account for originally.

Checklist

• All tests pass. (except on preexisting power electronics issue)
• Code compiles cleanly with flags -Wall -Wpedantic -Wconversion -Wextra.
• The new code follows GridKit™ style guidelines.
• There are unit tests for the new code.
• The new code is documented.
• The feature branch is rebased with respect to the target branch.
• I have updated CHANGELOG.md to reflect the changes in this PR. If this is a minor PR that is part of a larger fix already included in the file, state so.

Further comments

All 5 models start in a steady state now.

I'm waiting on the case comparison CLI args or generally better results comparison be- but visual inspection against the power world simulation confirms the two new models and the cases are being simulated correctly:

Illinois Generator Speed

New England Generator Speed

WECC

Texas

Hawaii