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A 330 kV power system contains three substations A, B and C having fault levels of 20 GVA each. The system is to be reinforced by inserting three current limiting reactors of j5 Ω each in between the busbars interconnecting the generators. Resistance is to be neglected. a) Draw a  circuit diagram to indicate the inserted current limiting reactors. Use the diagram to answer the following questions: i) Calculate the respective reactances of the three generators b) Assuming a symmetrical fault occurs at C, calculate the following: i) Total reactance ii) New fault current  iii)New fault MVA

A 330 kV power system contains three substations A, B and C having fault levels of 20 GVA each. The system is to be reinforced by inserting three current limiting reactors of j5 Ω each in between the busbars interconnecting the generators. Resistance is to be neglected. a) Draw a  circuit diagram to indicate the inserted current limiting reactors. Use the diagram to answer the following questions: i) Calculate the respective reactances of the three generators b) Assuming a symmetrical fault occurs at C, calculate the following: i) Total reactance ii) New fault current  iii)New fault MVA

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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A 330 kV power system contains three substations A, B and C having fault

levels of 20 GVA each. The system is to be reinforced by inserting three current

limiting reactors of j5 Ω each in between the busbars interconnecting the

generators. Resistance is to be neglected.

a) Draw a  circuit diagram to indicate the inserted current limiting reactors. Use the diagram to answer the following questions:

i) Calculate the respective reactances of the three generators

b) Assuming a symmetrical fault occurs at C, calculate the following:

i) Total reactance

ii) New fault current 

iii)New fault MVA

 

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