A Novel Subspace Decomposition with Rotational Invariance Technique to Estimate Low-Frequency Oscillatory Modes of the Power Grid

Figure 3

Interarea mode distribution utilizing Monte Carlo simulation at SNR 30 dB and 10 dB: (a) distribution of frequency using with SNR 30 dB, (b) distribution of attenuation factor using with SNR 30 dB, (c) distribution of frequency using with SNR 10 dB, and (d) distribution of attenuation factor using with SNR 10 dB.

(a)

(b)

(c)

(d)