- 1 A Slg Fault Occurs At Bus 4 Of The Power System Shown In Fig 1 Determine The Fault Current In Amperes Sequence Vo 1 (33.97 KiB) Viewed 41 times
1- A SLG fault occurs at bus 4 of the power system shown in Fig. 1. Determine the fault current, in amperes, sequence voltages, and voltages at the point of fault. Assume the fault has zero impedance. Generator 1:40 MVA, 6.6 kV, X1=X2=0.10 pu, Xo = 0.20 pu. Generator 2: 60 MVA, 6.6 kV, X2=X2= 0.15 pu, X.= 0.20 pu. Generator 3: 50 MVA, 11 kV, X1=X2 = 0.12 pu, Xo = 0.15 pu. Transformer 1-2: 50 MVA, 6.6/132 kV. X = 0.10 pu. Transformer 1-5: 70 MVA, 6.6/220 kV, X=0.08 pu. Transformer 3-4: 30 MVA, 11/132 kV, X=0.06 pu. Transformer 6-4: 25 MVA, 11/220 kV, X -0.075 pu. Transmission line 2-3: Z=(30 +j90) 22 Transmission line 5-6: (50 +j80) 22 OYY 90 DY