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Subtransient fault current in per-unit and in kA, per-unit L-G Voltage at bus 1?

Subtransient fault current in per-unit and in kA, per-unit L-G Voltage at bus 1?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Subtransient fault current in per-unit and in kA, per-unit L-G Voltage at bus 1?

Determine the subtransient fault current in per-unit and in kA, as well as the per-unit line-to-ground voltages at the fault bus for a bolted single line-to-ground fault at the fault bus selected in Problem 9.2.
Transcribed Image Text:Determine the subtransient fault current in per-unit and in kA, as well as the per-unit line-to-ground voltages at the fault bus for a bolted single line-to-ground fault at the fault bus selected in Problem 9.2.
The single-line diagram of a three-phase power system is shown in Figure 9.17. Equipment ratings are given as follows: Synchronous generators: G1 1000 MVA 15 kV 1000 MVA G2 G3 500 MVA 15 kV 13.8 kV 13.8 kV G4 750 MVA Transformers: T1 1000 MVA T2 1000 MVA T3 500 MVA T4 750 MVA SYMMETRICAL FAULTS Line 1-2 Transmission lines: 1-2 765 kV 1-3 765 kV 2-3 765 kV 15 kV A/765 kV Y 15 kV A/765 kV Y 15 kV Y/765 kV Y 15 kV Y/765 kV Y ₁² ◄ Line 1-3 2 2 X = X₂ = 0.18, Xo = 0.07 per unit X = X₂ = 0.20, Xo = 0.10 per unit X = X₂ = 0.15, Xo = 0.05 per unit X = 0.30, X₂ = 0.40, Xo = 0.10 per unit T₂ Line 2-3 X₁ = 50 £2, Xo = 150 2 X₁ = 40 92, Xo = 100 2 X₁ = 40 92, Xo = 100 2 X = 0.10 per unit X = 0.10 per unit X = 0.12 per unit X = 0.11 per unit 3 T3 T₁ 4 youthy
Transcribed Image Text:The single-line diagram of a three-phase power system is shown in Figure 9.17. Equipment ratings are given as follows: Synchronous generators: G1 1000 MVA 15 kV 1000 MVA G2 G3 500 MVA 15 kV 13.8 kV 13.8 kV G4 750 MVA Transformers: T1 1000 MVA T2 1000 MVA T3 500 MVA T4 750 MVA SYMMETRICAL FAULTS Line 1-2 Transmission lines: 1-2 765 kV 1-3 765 kV 2-3 765 kV 15 kV A/765 kV Y 15 kV A/765 kV Y 15 kV Y/765 kV Y 15 kV Y/765 kV Y ₁² ◄ Line 1-3 2 2 X = X₂ = 0.18, Xo = 0.07 per unit X = X₂ = 0.20, Xo = 0.10 per unit X = X₂ = 0.15, Xo = 0.05 per unit X = 0.30, X₂ = 0.40, Xo = 0.10 per unit T₂ Line 2-3 X₁ = 50 £2, Xo = 150 2 X₁ = 40 92, Xo = 100 2 X₁ = 40 92, Xo = 100 2 X = 0.10 per unit X = 0.10 per unit X = 0.12 per unit X = 0.11 per unit 3 T3 T₁ 4 youthy
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