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Table 12 634-bus system operation condition

From: A matrix-perturbation-theory-based optimal strategy for small-signal stability analysis of large-scale power grid

State

Eigenvalue

Damping

Frequency

Modal 1

−0.6028 + j14.5467

0.0414

2.31513608 Hz

Modal 2

−0.5486 + j14.4215

0.0381

2.295081967 Hz

Modal 3

−0.5134 + j13.6761

0.0375

2.176667197 Hz

Modal 4

2.1815 + j0.0000

−1

0 Hz

Modal 5

12.6029 + j0.0000i

−1

0 Hz

……

…….

…….

…….