Q1/ A single-line diagram of a three-phase power system is shown in figure below. Equipment ratings are given as follows:- G1: 50 MVA, 20 KV, X = X₁-10%, X₂-1.5X₁, X-0.5X₁ T1: 75 MVA, 20KV/132KV, X₁- X₂-17.42402 referred to H.T side, Xo-0.1 X₁ T2: 100 MVA, 132KV/400KV, X₁-X-10%, X-3 X₁ T.L (each): X₁ X₂-j90 £2, X-3X₁ Infinite bus-bar: MVA 3000MVA, (X₁-X₂=Xo) a) Draw the positive, negative, and zero- sequence reactance diagrams using a 100MVA 132KV base in the transmission line side. b) Find the subtransient fault current if a single line to ground arcing fault occurs at bus-at rated voltage with arc impedance Z-0+j30 2. e Find the MVA,e for a 3-phase fault occurs at the same location (bus-2). GI E TYY T.L T.L 北 YA

Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
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Q1/ A single-line diagram of a three-phase power system is shown in figure below. Equipment
ratings are given as follows:-
G1: 50 MVA, 20 KV, X = X₁-10%, X₂-1.5X₁, X-0.5X₁
TI: 75 MVA, 20KV/132KV, X₁- X₂-17.42402 referred to H.T side, Xo-0.1 X₁
T2: 100 MVA, 132KV/400KV, X₁-X-10%, X-3 X₁
T.L (each): X₁ X₂-j90 £2, X-3X₁
Infinite bus-bar: MVA
3000MVA, (X₁=X₂-Xo)
a) Draw the positive, negative, and zero- sequence reactance diagrams using a 100MVA
132KV base in the transmission line side.
b) Find the subtransient fault current if a single line to ground arcing fault occurs at bus-at
rated voltage with arc impedance Z-0+j30 2.
e Find the MVA,e for a 3-phase fault occurs at the same location (bus-2).
GI
E
TYY
T.L
T.L
北
YA
Transcribed Image Text:Q1/ A single-line diagram of a three-phase power system is shown in figure below. Equipment ratings are given as follows:- G1: 50 MVA, 20 KV, X = X₁-10%, X₂-1.5X₁, X-0.5X₁ TI: 75 MVA, 20KV/132KV, X₁- X₂-17.42402 referred to H.T side, Xo-0.1 X₁ T2: 100 MVA, 132KV/400KV, X₁-X-10%, X-3 X₁ T.L (each): X₁ X₂-j90 £2, X-3X₁ Infinite bus-bar: MVA 3000MVA, (X₁=X₂-Xo) a) Draw the positive, negative, and zero- sequence reactance diagrams using a 100MVA 132KV base in the transmission line side. b) Find the subtransient fault current if a single line to ground arcing fault occurs at bus-at rated voltage with arc impedance Z-0+j30 2. e Find the MVA,e for a 3-phase fault occurs at the same location (bus-2). GI E TYY T.L T.L 北 YA
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