Design of a Robust Coordinated Power Oscillation Damper for Use with Large-Scale Wind Energy System Connected to a Multimachine Power System

Table 7

The oscillation modes with uncoordinated design of POD.

Operating scenario	Mode	Eigenvalue	Frequency (Hz)	Damping ratio (%)	Participating generators
1	M1	−2.3476 ± j10.8467	1.726	21.15	WG
	M2	−1.9961 ± j8.7160	1.387	22.32	G3, G4
	M3	−0.9418 ± j4.8491	0.772	19.07	All G
2	M1	−2.3200 ± j11.0844	1.764	20.49	WG
	M2	−2.2822 ± j8.3929	1.336	26.24	G3, G4
	M3	−0.6928 ± j4.2339	0.674	16.15	All G
3	M1	−2.3543 ± j11.0934	1.766	21.15	WG
	M2	−2.3803 ± j7.9814	1.270	28.58	G3, G4
	M3	−0.3196 ± j3.2529	0.518	9.78	All G