Research Article
Application of Firefly Algorithm in Voltage Stability Environment Incorporating Circuit Element Model of SSSC with Variable Susceptance Model of SVC
Table 5
Minimum-maximum load bus voltage values in p.u.
| (a) For 14-bus system |
| | Cases | | | Preinsertion
of FACTS | Bus number | Postinsertion of FACTS | Preinsertion
of FACTS | Bus number | Postinsertion of FACTS | | FA | SFLA | DE | PSO | FA | SFLA | DE | PSO |
| | Case 1 | 1.0173 | 4 | 1.0252 | 1.0211 | 1.0203 | 1.0143 | 1.0604 | 7 | 1.0696 | 1.0673 | 1.0642 | 1.0617 | | Case 2 | 0.9656 | 14 | 1.0004 | 0.9884 | 0.9933 | 0.9824 | 1.0101 | 7 | 1.0211 | 1.0176 | 1.0199 | 1.0155 | | Case 3 | 0.9913 | 5 | 1.0264 | 1.0208 | 1.0104 | 1.0111 | 1.0350 | 13 | 1.0496 | 1.0490 | 1.0460 | 1.0438 |
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| (b) For 30-bus system |
| | Cases | | | Preinsertion
of FACTS | Bus number | Postinsertion of FACTS | Preinsertion
of FACTS | Bus number | Postinsertion of FACTS | | FA | SFLA | DE | PSO | FA | SFLA | DE | PSO |
| | Case 1 | 0.9953 | 30 | 0.9978 | 0.9976 | 0.9959 | 0.9954 | 1.0576 | 11 | 1.0820 | 1.0820 | 1.0820 | 1.0822 | | Case 2 | 0.8915 | 30 | 0.9662 | 0.9035 | 0.9415 | 0.9410 | 1.0004 | 11 | 1.0667 | 1.0620 | 1.0520 | 1.0550 | | Case 3 | 0.9661 | 5 | 1.0121 | 0.9600 | 0.9600 | 0.9607 | 1.0495 | 11 | 1.0820 | 1.0820 | 1.0820 | 1.0820 |
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