TLO 4: Compute subtransient currents and voltages during unsymmetrical faults in a power system. Solve the following problems: All solutions must be handwritten and will be converted to a single file-pdf format. Use 5 decimal places. The one-line diagram of a simple power system is shown in the figure. The neutral of each generator is grounded through a current-limiting reactor of 0.25/3 per unit on a 100- MVA base. The system data expressed in per unit on a common 100-MVA base is tabulated below. The generators are running on no-load at their rated voltage and rated frequency with their emfs in phase. Determine the fault current and voltages for the following faults. a. A single line-to-ground fault at bus 2 through a fault impedance Z, = j0.125 per unit. b. A line to line fault at bus 2 through a fault impedance Z, = j0.125 per unit. c. A double line to ground fault at bus 2 through a fault impedance Z, = j0.125 per unit.

TLO 4: Compute subtransient currents and voltages during unsymmetrical faults in a power system. Solve the following problems: All solutions must be handwritten and will be converted to a single file-pdf format. Use 5 decimal places. The one-line diagram of a simple power system is shown in the figure. The neutral of each generator is grounded through a current-limiting reactor of 0.25/3 per unit on a 100- MVA base. The system data expressed in per unit on a common 100-MVA base is tabulated below. The generators are running on no-load at their rated voltage and rated frequency with their emfs in phase. Determine the fault current and voltages for the following faults. a. A single line-to-ground fault at bus 2 through a fault impedance Z, = j0.125 per unit. b. A line to line fault at bus 2 through a fault impedance Z, = j0.125 per unit. c. A double line to ground fault at bus 2 through a fault impedance Z, = j0.125 per unit.

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

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.34P

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