Research Article
A New Hybrid Nelder-Mead Particle Swarm Optimization for Coordination Optimization of Directional Overcurrent Relays
Table 2
Optimal settings of the relays for an IEEE 8-bus test system (LP problem).
| Algorithm | Linprog | PSO | Original NM-PSO | Proposed NM-PSO | Relay | | TDS | TDS | TDS | TDS |
| 1 | 600 | 0.1007 | 0.1000 | 0.1000 | 0.1000 | 2 | 800 | 0.2485 | 0.2191 | 0.2260 | 0.2178 | 3 | 500 | 0.2294 | 0.2272 | 0.2369 | 0.2240 | 4 | 800 | 0.1115 | 0.1104 | 0.1234 | 0.1097 | 5 | 600 | 0.1003 | 0.1000 | 0.1075 | 0.1000 | 6 | 500 | 0.3858 | 0.3844 | 0.3882 | 0.3850 | 7 | 600 | 0.1103 | 0.1030 | 0.1233 | 0.1028 | 8 | 500 | 0.3575 | 0.3645 | 0.3587 | 0.3537 | 9 | 600 | 0.1001 | 0.1000 | 0.1007 | 0.1000 | 10 | 500 | 0.2947 | 0.3476 | 0.2963 | 0.2943 | 11 | 600 | 0.1794 | 0.2102 | 0.1958 | 0.1786 | 12 | 500 | 0.5591 | 0.6000 | 0.6194 | 0.5954 | 13 | 600 | 0.1007 | 0.1000 | 0.1000 | 0.1000 | 14 | 800 | 0.1094 | 0.1000 | 0.1030 | 0.1000 |
| Obj-Fun | 1.9640 | 2.0468 | 2.0278 | 1.9783 |
|
|