Problem 1(A)- In reference to the power system shown below, the system is operating at nominalvoltage without pre-fault currents (load currents ignored) when a bolted ( = 0p .u .) single line-toground fault occurs on phase A at bus 3. Both machines are grounded through reactance.X, = X, =15%X, = 50%1234my O어。100MVA,20KV100MVA100MVA100MVA,20KVX, = X = 20%20Υ/345Y - kV20Y /345Y – kVX, = X = 20%X2 = 20%X, = X, = X, = 8%X, = X, = X, = 8%X2 = 20%%3DX, = 4%X, = 4%X, = 5%X = 5%Fig. 1-Single-line diagram for the system in problems 1-A, 1-B, and 1-C(a) The system's Thevenin equivalent positive-, negative-, and zero-sequence networks(b) The fault current (p.u.) at phase A

Answered: Image /qna-images/answer/c3e99a24-b761-4d6b-b603-57ebc0399205.jpg

Problem 1(A)- In reference to the power system shown below, the system is operating at nomina voltage without pre-fault currents (load currents ignored) when a bolted ( = 0 p .u .) single line- to ground fault occurs on phase A at bus 3. Both machines are grounded through reactance. X, = X, =15% X, = 50% 2 3 4 to Y 100MVA,20KV 100MVA 100MVA 100MVA,20KV 20Υ/345Y- kV X, = X, = 20% X, = X, = X, = 8% X,= 20% 20Υ/345Υ - kV X, = X, = 20% X2 = 20% X = X, = X, = 8% X, = 4% X, = 4% X, = 5% X = 5% Fig. 1-Single-line diagram for the system in problems 1-A, 1-B, and 1-C (a) The system's Thevenin equivalent positive-, negative-, and zero-sequence networks (b) The fault current (p.u.) at phase A

Problem 1(A)- In reference to the power system shown below, the system is operating at nomina voltage without pre-fault currents (load currents ignored) when a bolted ( = 0 p .u .) single line- to ground fault occurs on phase A at bus 3. Both machines are grounded through reactance. X, = X, =15% X, = 50% 2 3 4 to Y 100MVA,20KV 100MVA 100MVA 100MVA,20KV 20Υ/345Y- kV X, = X, = 20% X, = X, = X, = 8% X,= 20% 20Υ/345Υ - kV X, = X, = 20% X2 = 20% X = X, = X, = 8% X, = 4% X, = 4% X, = 5% X = 5% Fig. 1-Single-line diagram for the system in problems 1-A, 1-B, and 1-C (a) The system's Thevenin equivalent positive-, negative-, and zero-sequence networks (b) The fault current (p.u.) at phase A

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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