Power system scheduling model considering period-to-period ramp-capability constraints with renewable power uncertainty

Abstract

Power system scheduling with renewable power integration aims to determine the scheduled power of conventional power plants and renewable power plants. This paper proposes a day-ahead power system scheduling method considering period-to-period ramp-capability constraints with renewable power uncertainty. The renewable uncertainty cost is considered based on the overestimation and underestimation penalty cost and further converted to be a linear model. The period-to-period ramp-capability constraints with renewable power uncertainty are incorporated into the proposed day-ahead scheduling model, which ensures that any period-to-period power trajectory within upper and lower envelops are restricted by the ramping up and down limits. Finally, numerical studies in the IEEE 118-bus system are presented to demonstrate the merits of the proposed method.