Short-Circuit Ratio Constrained Robust Unit Commitment with Grid-Forming Energy Storage: A Filter-Column-and-Constraint Generation Algorithm

The increasing integration of wind power has reduced power system strength, posing significant threats to operational security. Existing unit commitment models, however, have not considered the short-circuit ratio on dispatch decisions, which may lead to generation schedules that violate system security requirements. To address this issue, this paper proposes a robust unit commitment model that explicitly incorporates short-circuit ratio constraints and employs grid-forming energy storage to enhance system strength. Considering that wind power output may not necessarily fall within the uncertainty interval, this paper characterizes a decision-dependent uncertainty structure. Furthermore, a filter-column-and-constraint generation algorithm is proposed to improve the computational performance by eliminating saturated scenarios. Case studies on the IEEE 118 bus system and a provincial grid in China demonstrate the effectiveness of the proposed model and exhibit superior computational efficiency.