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