Coordination of dual setting overcurrent relays in microgrid with optimally determined relay characteristics for dual operating modes

Protection and Control of Modern Power Systems

Table 7 Coordination constraint violation summary of the 7-bus microgrid system using GA

Setting calculated	Characteristics curve considered	Constraint violation in conventional DOCR [20]		Constraint violation in dual setting DOCR
Setting calculated	Characteristics curve considered	Islanded	Grid-connected	Islanded	Grid-connected
Islanded	NI	NIL	13	NIL	01
	VI	NIL	14	NIL	16
	EI	NIL	5	NIL	17
	Mixed	NIL	12	NIL	16
Grid-connected	NI	08	NIL	04	NIL
	VI	07	NIL	04	NIL
	EI	04	NIL	07	NIL
	Mixed	06	NIL	05	NIL