Q:- Consider the single-line diagram of a power system shown below. The transient reactance of each part of the system is as shown in table and expressed in p.u. on a common 100 MVA base. A three-phase fault with impedance of j0.16 p.u. occurs at bus (5). Determine short-circuit capacity (fault level) and short circuit current? Assume the fault voltage at bus (5) equal 112 KV. G₁ =100 MVA G₂ = 100 MVA G₁ Xg = 10% X = 20% 11: 112 KV 112: 11 KV otot foton T₁ T₂ G₂ j0.4 j0.8 T₁=100MVA XT=10% T₂=100MVA XT=20% j0.4 4

Q:- Consider the single-line diagram of a power system shown below. The transient reactance of each part of the system is as shown in table and expressed in p.u. on a common 100 MVA base. A three-phase fault with impedance of j0.16 p.u. occurs at bus (5). Determine short-circuit capacity (fault level) and short circuit current? Assume the fault voltage at bus (5) equal 112 KV. G₁ =100 MVA G₂ = 100 MVA G₁ Xg = 10% X = 20% 11: 112 KV 112: 11 KV otot foton T₁ T₂ G₂ j0.4 j0.8 T₁=100MVA XT=10% T₂=100MVA XT=20% j0.4 4

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 7.4P

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