Wide-Area Damping Controller Design Based on the Frequency Domain Self-Excitation Method

Table 3

System indices for P=200MW.

Alternative input signal	Residue index	geometric laterality index	frequency	Damping ratio	Compensation phase
the rotor speed difference of G1 and G3	0.3568	0.8951	0.6587	0.0473	97.2
the active power of the AC line	1.2302e-06i	0.7501	0.6331	0.0035	115.5
AC line current amplitude	0.0117	0.7276	0.6245	0.0172	31.4
difference of voltage phase between two sides of AC line	1.4371e-08	0.7330	0.5891	0.0063	29.8