Design of SVC Controller Based on Improved Biogeography-Based Optimization Algorithm

Table 1

Real parts of SSO shaft modes.

Operating conditions	Modal 1/13.19 Hz		Modal 2/22.82 Hz		Modal 3/28.19 Hz
	Without SVC	With SVC	Without SVC	With SVC	Without SVC	With SVC
1	−0.058	−0.079	−0.012	−0.039	0.048	−0.021
2	−0.070	−0.085	−0.016	−0.045	0.053	−0.020
3	−0.050	−0.076	−0.009	−0.036	0.058	−0.025
4	−0.068	−0.083	−0.006	−0.041	0.057	−0.023