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

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.43P

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