Two generator units G 1 and G 2 are connected by 15kV line with a bus at the mid-point as shown below G 1 = 250 MVA, 15 kV, positive sequence reactance X G1 = 25% on its own base G 2 = 100 MVA, 15 kV, positive sequence reactance X G2 = 10% on its own base L 1 and L 2 = 10 km, positive sequence reactance X L = 0.225 Ω/km In the above system, the three – phase fault MVA at the bus 3 is

GATE Electrical Engineering (EE) 2011 Solved Paper

Question : 63 of 65

Marks: +1, -0

Two generator units G₁ and G₂ are connected by 15kV line with a bus at the mid-point as shown below

G₁ = 250 MVA, 15 kV, positive sequence reactance X_G1 = 25% on its own base
G₂ = 100 MVA, 15 kV, positive sequence reactance X_G2 = 10% on its own base L₁ and L₂ = 10 km, positive sequence reactance X_L = 0.225 Ω/km
In the above system, the three – phase fault MVA at the bus 3 is

82.55 MVA
85.11 MVA
170.91 MVA
181.82 MV

Validate

Go to Question:

Prev Question

Next Question