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Table 4 Comparison of damping ratios—IEEE 14-bus system with wind and solar power

From: An enhanced particle swarm optimization algorithm for improving the renewable energy penetration and small signal stability in power system

Most associated states

Damping ratio

Before maximization of wind and solar power

After maximization of wind and solar power

After optimization of damping ratio

vr1_Exc_1, e2q_Syn_2

0.983

0.985

1

omega_Syn_3, delta_Syn_3

0.324

0.307

0.324

e1q_Syn_1, vf_Exc_1

0.118

0.078

1

omega_Syn_2,delta_Syn_2

0.319

0.191

0.32

omega_Syn_4,delta_Syn_4

0.143

0.18

0.193

omega_Syn_1,delta_Syn_1

0.245

0.0757

0.521

e1q_Syn_2, vf_Exc_2

0.824

1

1