Q2/K/ The positive-sequence reactances for the power system shown in Figure are in per unit on a common MVA base. Resistances are neglected and the negative-sequence impedances are assumed to be the same as the positive-sequence impedances. A bolted line-to-line fault occurs between phases b and c at bus 2,/Before the fault occurrence, all bus voltages are 1.0 per unit. Obtain the positive sequence bus impedance matrix. Find the fault current, the three- phase bus voltages during fault, and the line currents in each phase. T1 1 T2 j0.6 X=j0.05 j0.15 G1 j0.05 X=j0.05 (G2 3 j0.3

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Q2/K/ The positive-sequence reactances for the power system shown in Figure are in per unit
on a common MVA base. Resistances are neglected and the negative-sequence impedances
are assumed to be the same as the positive-sequence impedances. A bolted line-to-line fault
occurs between phases b and c at bus 2, Before the fault occurrence, all bus voltages are 1.0
per unit. Obtain the positive sequence bus impedance matrix. Find the fault current, the three-
phase bus voltages during fault, and the line currents in cach phase.
1
T2
j0.6
j0.05 X=j0.05
(G2)
X=j0.05 j0.15
38
3
j0.3
Transcribed Image Text:Q2/K/ The positive-sequence reactances for the power system shown in Figure are in per unit on a common MVA base. Resistances are neglected and the negative-sequence impedances are assumed to be the same as the positive-sequence impedances. A bolted line-to-line fault occurs between phases b and c at bus 2, Before the fault occurrence, all bus voltages are 1.0 per unit. Obtain the positive sequence bus impedance matrix. Find the fault current, the three- phase bus voltages during fault, and the line currents in cach phase. 1 T2 j0.6 j0.05 X=j0.05 (G2) X=j0.05 j0.15 38 3 j0.3
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