Optimal Protection Coordination for Microgrid under Different Operating Modes

Table 4

Optimal TDSs of the CO relays.

Relay	CT ratio	Tap	TDS
			Utility-only mode	Grid-connected mode
Main CB1	2000/5	5.0	0.458	0.451
FCB2	600/5	5.0	1.250	1.125
FCB3	600/5	5.0	1.250	1.074
LCB4	1000/1	0.38	0.900	0.770
LCB5	1000/1	0.38	0.700	0.600
LCB6	1000/1	0.38	0.080	0.080
LCB7	1000/1	0.38	0.900	0.770
LCB8	1000/1	0.38	0.700	0.509
LCB9	1000/1	0.38	0.080	0.080
CB10	1000/1	0.17	0.080	0.080
CB11	1000/1	0.17	0.080	0.080
CB12	1000/1	0.17	0.080	0.080
CB13	1000/1	0.17	0.080	0.080