Answered: For transferring electrical power at…

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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For transferring electrical power at 220 kV, six conductors of ACSR Drake constitute a 60Hz double circuit three phase line arranged as shown below. The vertical spacing between consecutive conductors is 14ft; the longer horizontal distance is 32ft whereas the shorter horizontal distance is 25ft.

a. Find the inductance per phase per mile and the inductive reactance per phase in ohms per mile.

b. Find the capacitive reactance to neutral in ohm-miles.

c. Find the resistance per phase per mile in ohms per miles.

d. If the length of the line is 90 miles then draw an equivalent circuit of the line and analyse the open circuit and short circuit performance of the line.

e. Find the maximum power we can transmit over the line.

f. If the line is delivering power to a load of 20MW at 0.8 power factor lagging then find the voltage at the receiving end of the line. Also, Determine the voltage regulation, losses and efficiency of the line.

g. If a fixed shunt compensation of 3 MVAr is attached at the receiving end then will there be Ferranti Effect? Find the no load voltage at the receiving end.

h. If the shunt compensated line is delivering power to the load in part f, then find the voltage regulation, losses and efficiency of the line.

i. If instead of shunt compensation, 3 MVAr fixed series compensation is attached to the line, then find the no load voltage at the receiving end.

j. Find the voltage regulation, losses and efficiency of the line while delivering power to the load in part f.

FIGURE 4.34
A
• 1
3'
For Problem 4.27
(Double-circuit
conductor configuration)
B
2'
B'
3
1'
A'

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