Research Article
A Novel Subspace Decomposition with Rotational Invariance Technique to Estimate Low-Frequency Oscillatory Modes of the Power Grid
Table 2
Statistical analysis for RMP, QR-TLS-ESPRIT, KLT-TLS-ESPRIT, data-SSI, and MKLT-TLS-ESPRIT at SNR = 30 dB.
| | SNR = 30 dB | Frequency (Hz) | Attenuation factor | | Std. dev. | Mean | Variance | Std. dev. | Mean | Variance |
| | RMP | 1.5286 | 0.4201 | 2.3366 | 1.3173 | −0.0201 | 1.7352 | | QR-TLS-ESPRIT | 1.2671 | 0.3886 | 1.6055 | 3.1347 | −0.1513 | 9.8263 | | KLT-TLS-ESPRIT [12] | 7.1862 | 0.4013 | 5.8139 | 3.1178 | −0.0897 | 9.7206 | | Data-SSI | 7.6249 | 0.3976 | 5.8139 | 2.3799 | −0.1173 | 5.6639 | | MKLT-TLS-ESPRIT | 3.9543 | 0.4000 | 1.5636 | 1.1322 | −0.0700 | 1.2818 |
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