Table 6 Comparison of damping ratios—Kerala grid with wind and solar power
Most associated states | Before maximization of renewable generation | After maximization of renewable generation | After optimization of damping ratio | |||
|---|---|---|---|---|---|---|
Complex eigenvalue | Damping ratio | Complex eigenvalue | Damping ratio | Complex eigenvalue | Damping ratio | |
vr1_Exc_4, e2q_Syn_3 | − 45.1074 ± 4.6881i | 0.995 | − 45.0517 ± 4.7378i | 0.995 | – | 1 |
vr1_Exc_2, e2q_Syn_1 | − 45.3261 ± 2.7426i | 0.998 | – | 1 | – | 1 |
vr1_Exc_3, e2q_Syn_2 | − 45.1933 ± 3.5004i | 0.997 | − 45.0827 ± 3.6811i | 0.997 | – | 1 |
omega_Syn_1, delta_Syn_1 | − 0.5605 ± 7.6214i | 0.076 | − 0.5715 ± 7.5274i | 0.076 | − 0.6046 ± 7.447i | 0.082 |
omega_Syn_2, delta_Syn_2 | − 0.3286 ± 8.85i | 0.0371 | − 0.41918 ± 10.9843i | 0.038 | − 0.4534 ± 0.9322i | 0.042 |
omega_Syn_3, delta_Syn_3 | − 0.2935 ± 7.0098i | 0.0418 | − 0.35146 ± 7.0287i | 0.05 | − 0.3113 ± 7.064i | 0.047 |
e1q_Syn_3, vf_Exc_4 | − 3.0218 ± 4.0428i | 0.599 | − 3.0404 ± 4.1021i | 0.595 | – | 1 |
e1q_Syn_2, vf_Exc_3 | − 0.34682 ± 1.5612i | 0.217 | − 3.7871 ± 0.77427i | 0.98 | – | 1 |
e1q_Syn_1, vr2_Exc_2 | – | 1 | − 0.6291 ± 0.49498i | 0.786 | – | 1 |
omega_Syn_4, omega_Syn_3 | − 0.6992 ± 1.7335i | 0.374 | − 0.39893 ± 2.0688i | 0.189 | − 0.689 ± 1.7435i | 0.375 |