The zero-sequence, positive-sequence and negative-sequence bus impedance matrices for a three bus power system are given as [0.21 0.42 0.55] Zous =j 0.42 0.75 0.64 pu Lo.55 0.64 0.85) [0.36 0.45 0.75] Zbus = ZBus = j 0.45 0.85 0.82 pu Lo.25 0.82 0.34] Evaluate the per unit fault current and the bus voltages during fault at bus 1, with fault impedance, Zi given as jo.1 for. a. a three phase fault. b. a single line-to-ground fault. C. a line-to-line fault.

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
Chapter9: Unsymmetrical Faults
Section: Chapter Questions
Problem 9.42P
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The zero-sequence, positive-sequence and negative-sequence bus impedance
matrices for a three bus power system are given as
[0.21 0.42 0.55]
Zous = j 0.42 0.75 0.64 pu
Lo.55 0.64 0.85]
[0.36 0.45 0.75]
ZBus = ZBus = i 0.45 0.85 0.82 pu
Lo.25 0.82 0.34]
Evaluate the per unit fault current and the bus voltages during fault at bus 1, with fault
impedance, Zr given as j0.1 for:
a.
a three phase fault.
a single line-to-ground fault.
b.
C.
a line-to-line fault.
Transcribed Image Text:The zero-sequence, positive-sequence and negative-sequence bus impedance matrices for a three bus power system are given as [0.21 0.42 0.55] Zous = j 0.42 0.75 0.64 pu Lo.55 0.64 0.85] [0.36 0.45 0.75] ZBus = ZBus = i 0.45 0.85 0.82 pu Lo.25 0.82 0.34] Evaluate the per unit fault current and the bus voltages during fault at bus 1, with fault impedance, Zr given as j0.1 for: a. a three phase fault. a single line-to-ground fault. b. C. a line-to-line fault.
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