72-hour residual unit commitment

As a first step toward multi-day unit commitment, the ISO intends to extend the Residual Unit Commitment (RUC) process to a 72-hour process rather than a 24-hour unit commitment process. Extending the RUC to a 72-hour period allows the optimization solution to evaluate if it is economic to keep a resource online during off-peak hours versus cycling the resource off, based on the next day's load forecast conditions. The commitment decisions beyond the first 24 hours will affect the next Integrated Forward Market run for evaluation by setting the initial conditions across midnight. This RUC extension does not change the day-ahead market external communication and relevant settlement rules.