A Novel Protection Scheme against Fault Resistance for AC Microgrid

Table 2

Active power values and the protection threshold setting values of various types of FTFR in different internal fault positions under grid-connected mode.

Grid-connected mode	Types of fault	Fault position (MW)
		side	25%	50%	75%	side
	ABG (5 Ω, 5 Ω)	7.52 (0.91)	2.02 (0.80)	0.97 (0.67)	1.83 (0.65)	7.36 (0.60)
	ABG (5 Ω, 6 Ω)	6.80 (1.03)	1.28 (0.59)	0.27 (0.15)	1.14 (0.14)	6.22 (0.12)
	AB (5 Ω)	1.06 (0.22)	0.89 (0.20)	0.51 (0.17)	0.86 (0.14)	1.05 (0.13)
	AG (5 Ω)	4.00 (0.75)	0.78 (0.17)	0.28 (0.12)	0.70 (0.11)	3.86 (0.11)
	ABCG (4 Ω, 5 Ω, 6 Ω)	6.34 (1.08)	1.67 (0.42)	0.23 (0.11)	1.45 (0.11)	5.93 (0.10)
	ABCG (5 Ω, 5 Ω, 5 Ω)	17.1 (2.84)	6.12 (1.51)	2.05 (1.0)	5.78 (0.09)	16.3 (0.09)