generator_only_runs_during_grid_outage=True forces size_kw=0

• I'm submitting a ...

  • bug report
  • feature request
  • support request => Please do not submit support request here, see note at the top of this template.

• Do you want to request a feature or report a bug?
  bug

• What is the current behavior?
  If generator_only_runs_during_grid_outage=True, then the generator size output is zero, even if non-zero existing generator or minimum size is given. In addition to the size being incorrect, this will affect costs (O&M and, if gen not existing, capX) and cause issues in postprocessing (e.g. outage simulator script).

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via
  https://plnkr.co or similar (you can use this template as a starting point: http://plnkr.co/edit/tpl:AvJOMERrnz94ekVua0u5).

• specify a non-zero existing_kw or min_kw for Generator
• set generator_only_runs_during_grid_outage=True
• don’t put in an outage (outage start and end are null)

• What is the expected behavior?
  If generator_only_runs_during_grid_outage=True, then generator size_kw output should be existing_kw+min_kw

• What is the motivation / use case for changing the behavior?
  incorrect output

• Please tell us about your environment:

  • REopt API Version: on develop branch
  • Operating System: macOS Catalina
  • Python version: 3.6.13
  • Julia version: 1.5

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)

Start by reproducing the case with a non-zero Generator existing_kw or min_kw, generator_only_runs_during_grid_outage=True, and null outage start and end. Trace the generator sizing logic and verify that size_kw becomes existing_kw+min_kw, while costs and postprocessing remain consistent.