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

Table 6

Statistical analysis of the IAOs for IEEE benchmark two-area grid system with three-phase line short-circuit fault using RMP, QR-TLS-ESPRIT, KLT-TLS-ESPRIT, data-SSI, and MKLT-TLS-ESPRIT at SNR = 30 dB.

SNR = 30 dB	Frequency = 0.6366 Hz			Attenuation factor = −0.25
	Std. dev.	Mean	Variance	Std. dev.	Mean	Variance
RMP	8.8334	0.6229	7.1122	7.3275	−0.2120	5.369
QR-TLS-ESPRIT	8.4935	0.6138	7.2139	2.5488	−0.2257	6.4963
KLT-TLS-ESPRIT	5.1392	0.6373	1.2977	8.9327	−0.2143	7.9793
Data-SSI	8.1013	0.63893	6.5631	8.9487	−0.2293	8.0079
MKLT-TLS-ESPRIT	3.4867	0.63728	1.2157	4.1550	−0.2364	1.7264