A Communication-Assisted Distance Protection for AC Microgrids considering the Fault-Ride-Through Requirements of Distributed Generators

Table 3

Relay operating time (s) during a fault occurring in the feeder AB in the islanded mode.

Fault location	Fault resistance (Ω)	ITD method		Method in [30]
		Relay 1	Relay 2	Relay 1	Relay 2
12.5%	0.01	0.001	0.151	0.001	0.380
	50	0.003	0.158	—	—
	100	0.006	0.143	—	—
20.0%	0.01	0.009	0.066	0.001	0.380
	50	0.006	0.082	—	—
	100	0.009	0.066	—	—
50.0%	0.01	0.028	0.028	0.001	0.380
	50	0.032	0.024	—	—
	100	0.038	0.020	—	—
80.0%	0.01	0.104	0.004	0.380	0.001
	50	0.110	0.003	—	—
	100	0.116	0.003	—	—
87.5%	0.01	0.151	0.001	0.380	0.001
	50	0.152	0.001	—	—
	100	0.157	0.001	—	—