Parallel inverter control using different conventional control methods and an improved virtual oscillator control method in a standalone microgrid

Protection and Control of Modern Power Systems

Table 2 Eigenvalues for different filter resistor values

R_f (mΩ)	Droop	VSM	VOC	VOC-PSO
0.1	− 9.55 ± 247.94i	− 1.50 ± 591.23i, − 1.50 ± 591.23i	− 112.34 ± 58.21i	− 79.43 ± 73.13i
0.2	− 8.41 ± 212.84i	− 1.76 ± 575.64i, − 1.76 ± 575.64i	− 92.17 ± 55.14i	− 68.52 ± 64.42i
0.3	− 7.31 ± 189.39i	− 1.92 ± 561.42i, − 1.92 ± 561.42i	− 78.28 ± 50.28i	− 60.64 ± 59.83i
0.4	− 6.21 ± 175.39i	− 2.23 ± 545.24i, − 2.23 ± 545.24i	− 71.36 ± 46.42i	− 55.72 ± 55.25i
0.5	− 5.89 ± 146.86i	− 2.49 ± 531.78i, − 2.49 ± 531.78i	− 64.17 ± 44.68i	− 52.64 ± 53.89i
0.6	− 5.12 ± 116.42i	− 2.56 ± 519.26i, − 2.56 ± 519.26i	− 60.93 ± 42.12i	− 49.66 ± 51.22i
0.7	− 4.56 ± 87.59i	− 2.75 ± 510.18i, − 2.75 ± 510.18i	− 57.56 ± 40.98i	− 47.41 ± 50.21i
0.8	− 3.21 ± 62.48i	− 2.96 ± 506.29i, − 2.96 ± 506.29i	− 55.75 ± 38.12i	− 45.58 ± 49.82i
0.9	− 2.59 ± 56.06i	− 3.12 ± 501.45i, − 3.12 ± 501.45i	− 50.96 ± 37.52i	− 40.87 ± 49.68i
1	− 2.26 ± 53.19i	− 3.29 ± 496.58i, − 3.29 ± 496.58i	− 49.12 ± 36.68i	− 38.23 ± 48.23i