From: Reduced order modeling for transient simulation of power systems using trajectory piece-wise linear approximation
Trajectory for confidence interval
\(\varvec{\delta }_{\varvec{2}}\)
\(\varvec{\delta }_\mathbf{i } \quad \varvec{\forall } \mathbf i \varvec{\ne } \mathbf 2 \)
Trajectory 1
1.5
1