Design of Optimal Proportional Integral Derivative Based Power System Stabilizer Using Bat Algorithm

Table 4

EMOs having least damping factor for SMIB system with nominal operating conditions with PID-PSS reported in literature and BA-PID-PSS.

Controller	Eigenvalue	Dam. factor	Freq.
GA-PID-PSS [19]	−0.24386 ± 6.9823	0.034905	1.1113
HS-PID-PSS [19]	−0.82746 ± 8.8267	0.093336	1.4048
BFA-PID-PSS [22]	−0.85728 ± 9.3378	0.091423	1.4862
RCGA-PID-PSS [24]	−0.8924 ± 11.083	0.080258	1.764
ZN-PID-PSS [25]	−0.8741 ± 9.1725	0.094865	1.4599
BFA-PID-PSS [23]	−0.94423 ± 9.8075	0.095833	1.5609
PSBFA-PID-PSS [23]	0.86605 ± 19.065	−0.045381	3.0342
ABC-PID-PSS [26]	−0.67126 ± 8.7627	0.076381	1.3946
BBO-PID-PSS [27]	−0.77408 ± 11.198	0.068964	1.7822
BA-PID-PSS	−1.0733 ± 8.4915	0.125400	1.3515