Description

Addresses #778 by adding a new version of add_similar_to_expression! in expression_manipulation.jl, which handles expressions that are Arrays rather than GenericAffExpr. This implementation performs an elementwise sum of the two arrays, similar to the behavior of the + operator in EP[:expr1] = EP[:expr1] + EP[:expr2] when expr* are vectors.

What type of PR is this? (check all applicable)

• Bug Fix

Related Tickets & Documents

#778.

Checklist

• Code changes are sufficiently documented; i.e. new functions contain docstrings and .md files under /docs/src have been updated if necessary.
• The latest changes on the target branch have been incorporated, so that any conflicts are taken care of before merging. This can be accomplished either by merging in the target branch (e.g. 'git merge develop') or by rebasing on top of the target branch (e.g. 'git rebase develop'). Please do not hesitate to reach out to the GenX development team if you need help with this.
• Code has been tested to ensure all functionality works as intended.
• CHANGELOG.md has been updated (if this is a 'notable' change).
• I consent to the release of this PR's code under the GNU General Public license.

How this can be tested

As the Issue description suggests, this can be replicated with the 5_three_zones_w_piecewise_fuel example case by entering 2000 for the Static_Contingency_MW.

Post-approval checklist for GenX core developers

After the PR is approved

• Check that the latest changes on the target branch are incorporated, either via merge or rebase
• Remember to squash and merge if incorporating into develop