Table 10 Participation factors of speed associated with the electromechanical modes for case 2.

From: Improved chaotic Bat algorithm for optimal coordinated tuning of power system stabilizers for multimachine power system

Mode no

Eigen value

Freq.

D. ratio

Mode

Gen.

PF

1

− 0.1302 + 4.0683i

0.6475

0.0320

Inter-area

68 66 67

0.1133 0.2597 0.6240

2

− 0.0626 + 3.8980i

0.6204

0.0161

Inter-area

57 58 65

0.0812 0.1032 0.4071

3

− 0.0647 + 3.0679i

0.4883

0.0211

Inter-area

66 68

0.4086 0.5483

4

− 0.1381 + 2.4072i

0.3831

0.0573

Inter-area

66 67 65

0.1608 0.1946 0.3361

5

− 0.6158 + 10.4607i

1.6649

0.0588

Local

63

0.9960

6

− 0.3381 + 8.6847i

1.3822

0.0389

Local

56

0.7258

7

− 0.2575 + 8.5000i

1.3528

0.0303

Local

60

0.8994

8

− 0.3350 + 8.5017i

1.3531

0.0394

Local

59

0.6464

9

− 0.0200 + 7.1346i

1.1355

0.0028

Local

53

0.5595

10

− 0.0271 + 6.9007i

1.0983

0.0039

Local

62

0.5752

11

− 0.2225 + 7.1167i

1.1327

0.0313

Local

55

0.5321

12

− 0.2072 + 7.0845i

1.1275

0.0292

Local

57

0.4433

13

− 0.1762 + 6.4007i

1.0187

0.0275

Local

61

0.7273

14

0.1910 + 6.2814i

0.9997

− 0.0304

Local

54

0.3885

15

− 0.0223 + 6.1134i

0.9730

0.0036

Local

64

0.7695