From: A matrix-perturbation-theory-based optimal strategy for small-signal stability analysis of large-scale power grid
State
Eigenvalue
Damping ratio
Frequency (Hz)
Modal 1
−0.1946 ± j6.0854
0.032
1.0322
Modal 2
−0.1794 ± j5.3150
0.033
1.18156
Modal 3
−0.1972 ± j5.6199
0.0351
0.8944