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

<div>Test signals for local-area oscillating modes in power system using SNR 10 dB and 30 dB: (a) a test signal corresponds to local-area mode and (b) a test signal corresponds to local-area mode.</div>

Journal of Electrical and Computer Engineering

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Figure 4

Figure 4: A Novel Subspace Decomposition with Rotational Invariance Technique to Estimate Low-Frequency Oscillatory Modes of the Power Grid 