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Protection and Control of Modern Power Systems

Table 2 The 9-bus system unstable state

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

System state

Eigenvalue

Damping ratio

Oscillation frequency

Modal 1

−0.1515 ± j8.6712

0.0175

1.380057328 Hz

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