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

Figure 5

Local-area mode distribution utilizing 50,000 Monte Carlo simulation at SNR 30 dB and 10 dB: (a) distribution of frequency using with SNR 30 dB, (b) distribution of attenuation constant using with SNR 30 dB, (c) distribution of frequency using with SNR 10 dB, and (d) distribution of attenuation constant using with SNR 10 dB.

(a)

(b)

(c)

(d)