Research Article
A New Hybrid Nelder-Mead Particle Swarm Optimization for Coordination Optimization of Directional Overcurrent Relays
Table 1
P/B relays and the close-in fault currents for an IEEE 8-bus test system.
| Primary relay | Backup relay | No. | Current | No. | Current |
| 1 | 3230 | 6 | 3230 | 8 | 6080 | 9 | 1160 | 8 | 6080 | 7 | 1880 | 2 | 5910 | 1 | 993 | 9 | 2480 | 10 | 2480 | 2 | 5910 | 7 | 1880 | 3 | 3550 | 2 | 3550 | 10 | 3880 | 11 | 2340 | 6 | 6100 | 5 | 1200 | 6 | 6100 | 14 | 1870 | 13 | 2980 | 8 | 2980 | 14 | 5190 | 9 | 1160 | 7 | 5210 | 5 | 1200 | 14 | 5190 | 1 | 993 | 7 | 5210 | 13 | 985 | 4 | 3780 | 3 | 2240 | 11 | 3700 | 12 | 3700 | 5 | 2400 | 4 | 2400 | 12 | 5890 | 13 | 985 | 12 | 5890 | 14 | 1870 |
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