Table 7 Percentage error in estimating dominant modes at different X/R ratios for the modified CIGRE MV benchmark.
From: A kurtosis-ESPRIT algorithm for RealTime stability assessment in droop controlled microgrids
mp× 10− 7 | X/R ratio | System modes | Estimated modes | % Error Real | % Error Imag | Kurtosis measure |
|---|---|---|---|---|---|---|
0.7 | Unchanged (reference case) | −13.33 ± 47.96i | −12.427 ± 48.45i | 6.77 | 1.02 | 11.67 |
0.7 | Line 6 X/R Increased by 50% | −12.364 ± 52.4i | −12.505 ± 48.95i | 1.14 | 6.583 | 12.34 |
0.7 | Line 3 X/R Increased by 50% | −13.33 ± 47.96i | −12.394 ± 48.421i | 7.02 | 0.96 | 11.68 |
0.7 | Line 2 X/R decreased by 50% | −12.08 ± 53.84i | −11.207 ± 53.87i | 7.22 | 0.055 | 11.343 |
0.7 | Line 12 X/R decreased by 50% | −12.075 ± 53.82i | −11.276 ± 53.735i | 6.61 | 0.157 | 10.783 |
