| Loading Condition | Lightly loaded condition | Normal loaded condition | Heavily loaded condition | ||||||
| Optimization Technique | Firefly | PSO | GRADE | Firefly | PSO | GRADE | Firefly | PSO | GRADE |
| Ploss(p.u) | 0.19762 | 0.189052 | 0.185047 | 0.27863 | 0.249934 | 0.243697 | 1.30134 | 1.2899 | 1.284536 |