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Problem-4: Solve at Home Problem-4, Cont... The one-line diagram of a simple three-bus power system is shown in Figure-4. represented by an emf behind the sub-transient reactance. All impedances are expressed in per unit on a common MVA base. All resistances and shunt capacitances are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A three-phase fault occurs at bus 3 through a fault impedance of Z = j0.19 per unit. (a) Using Th'evenin's theorem obtain the impedance to the point of fault and the fault current in per unit. (b) Determine the bus voltages Each generator is j0.05 j0.075 j0.75 j0.30 j0.45 3 Figure-4: Single Line Diagram

Problem-4: Solve at Home Problem-4, Cont... The one-line diagram of a simple three-bus power system is shown in Figure-4. represented by an emf behind the sub-transient reactance. All impedances are expressed in per unit on a common MVA base. All resistances and shunt capacitances are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A three-phase fault occurs at bus 3 through a fault impedance of Z = j0.19 per unit. (a) Using Th'evenin's theorem obtain the impedance to the point of fault and the fault current in per unit. (b) Determine the bus voltages Each generator is j0.05 j0.075 j0.75 j0.30 j0.45 3 Figure-4: Single Line Diagram

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Power system protection
Problem-4: Solve at Home Problem-4, Cont.... The one-line diagram of a simple three-bus power system is shown in Figure-4. represented by an emf behind the sub-transient reactance. All impedances are expressed in per unit on a common MVA base. All resistances and shunt capacitances are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A three-phase fault occurs at bus 3 through a fault impedance of Zj = j0.19 per unit. (a) Using Th'evenin's theorem obtain the impedance to the point of fault and the fault current in per unit. (b) Determine the bus voltages Each generator is j0.05 j0.075 j0.75 j0.30 j0.45 3 Figure-4: Single Line Diagram
Transcribed Image Text:Problem-4: Solve at Home Problem-4, Cont.... The one-line diagram of a simple three-bus power system is shown in Figure-4. represented by an emf behind the sub-transient reactance. All impedances are expressed in per unit on a common MVA base. All resistances and shunt capacitances are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A three-phase fault occurs at bus 3 through a fault impedance of Zj = j0.19 per unit. (a) Using Th'evenin's theorem obtain the impedance to the point of fault and the fault current in per unit. (b) Determine the bus voltages Each generator is j0.05 j0.075 j0.75 j0.30 j0.45 3 Figure-4: Single Line Diagram
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