arxiveess.SY2026-07-02
A Time-to-Boundary Margin for Transient Stability: Unifying Critical Clearing Time and Operating-Point Drift
The loading margin to voltage collapse -- the distance in parameter space to the closest saddle-node bifurcation -- is a standard proximity index for voltage stability. This paper develops its transient-stability counterpart: a margin M that measures the time to the synchronism b…