3 Consider the one-line diagram of power system shown below; if a bolted three-phase fault (F1) occurs at the receiving end of the transmission line as shown: Gi 1 100 MVA, 11/132 kV 10% Reactance 100 MVA, 11 kV 15% Reactance Ti X-0.2 olm/phase/km G2 T2 200 km 50 MVA, 11 kV 10% Reactance 3 ph F1 faui F2 50 MVA, 11/132 kV 8% Reactance a) Develop equivalent circuit expressing all parameters in per unit values select Sbase= 100MVA b) Apply circuit reduction techniques and then find the net impedance(Zeg) at point of fault F1 c) Calculate fault level and fault current

3 Consider the one-line diagram of power system shown below; if a bolted three-phase fault (F1) occurs at the receiving end of the transmission line as shown: Gi 1 100 MVA, 11/132 kV 10% Reactance 100 MVA, 11 kV 15% Reactance Ti X-0.2 olm/phase/km G2 T2 200 km 50 MVA, 11 kV 10% Reactance 3 ph F1 faui F2 50 MVA, 11/132 kV 8% Reactance a) Develop equivalent circuit expressing all parameters in per unit values select Sbase= 100MVA b) Apply circuit reduction techniques and then find the net impedance(Zeg) at point of fault F1 c) Calculate fault level and fault current

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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L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1460 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm How many times the inrush current will be the rated current when the ASM is started directly? Answer options group 3.7473 5.2280 8.0815 7.1534 1.2558 4.3763 2.6455 6.3414
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