Startup/Shutdown Curves #89
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Enables the new startup/shutdown curves in Egret grid-parity-exchange/Egret#219. This enables more-realistic 5-minute simulations by modeling power injected by generators that just turned off or are about to turn on. When turning off, the shutdown curve is calculated from the last time the generator was on and injecting power.
Additionally, Prescient can now be run with a single-period SCED, which is commonly done is practice and is more performant. New options to preserve the old capability are disabled by default:
--enforce-sced-shutdown-ramprate: always enforces the ramp-down rate for the SCED. By disabling this by default, we ensure generators are always available to turn-off, which ensures a SCED problem does not run into shutdown-ramp infeasibilities.--no-startup-shutdown-curves: disables the startup/shutdown curve computation for the SCED.This PR also changes the meaning of the option
--sced-horizonto be the absolute number of time-steps in individual SCED problems, and changes the default to1. The original meaning did not allow for 5-minute interval SCEDs with a look-ahead shorter than one hour.Closes #57.