In the figure below, all impedances are in per unit on a common MVA base. The generators are operating on no load at their rated voltage. A three-phase fault occurs at bus 1 through a fault impedance of Zf = jo.o8 per unit. Find Vi during the fault in per unit.

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In the figure below, all impedances are in per unit on a common MVA base. The generators are
operating on no load at their rated voltage. A three-phase fault occurs at bus 1 through a fault
impedance of Zf = jo.o8 per unit. Find Vi during the fault in per unit.
X, = 0.1
Ooto
X 0.1
X =0.2
X-0.1
O a. vi(n=0.4 p.u
O b. vif)=0.5 p.u
OC V1(0=0.6 pu
VI=0.7 p.u
Transcribed Image Text:In the figure below, all impedances are in per unit on a common MVA base. The generators are operating on no load at their rated voltage. A three-phase fault occurs at bus 1 through a fault impedance of Zf = jo.o8 per unit. Find Vi during the fault in per unit. X, = 0.1 Ooto X 0.1 X =0.2 X-0.1 O a. vi(n=0.4 p.u O b. vif)=0.5 p.u OC V1(0=0.6 pu VI=0.7 p.u
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