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This document discusses calculating the capacitance and charging current per unit length for different arrangements of overhead transmission lines. It provides figures of three-phase transmission line configurations and asks the reader to determine capacitance and charging current given parameters like conductor diameter, spacing between conductors, and operating voltage. References for further reading on the topic are also included.

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115 views1 page

8 PDF

This document discusses calculating the capacitance and charging current per unit length for different arrangements of overhead transmission lines. It provides figures of three-phase transmission line configurations and asks the reader to determine capacitance and charging current given parameters like conductor diameter, spacing between conductors, and operating voltage. References for further reading on the topic are also included.

Uploaded by

ragupa
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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CAPACITANCE OF TRANSMISSION LINES 57

3.5. Determine the capacitance and charging current per unit length of the line when the arrange-
ment of the conductor is shown in Fig. P.3.5. The line is completely transposed.

0.4m
a a b b c c

5m 5m

Fig. P.3.5
The dia of conductor is 15 mm, and operating voltage is 220 kV.
3.6. A 3-phase double circuit line is shown in Fig. P.3.6. The diameter of each conductor is 2 cm.
Determine the capacitance and charging current per km length of the line, assume that the line
is transposed and the operating voltage 220 kV.

a c

2.2m

b b

2.2m

c a

5m

Fig. P.3.6
3.7. Determine the capacitance and charging current per km length of the double circuit 3-phase line
as shown in Fig. P.2.8. The transmission line is transposed within each circuit and each circuit
remains on its own side. The dia of each conductor is 15 mm and operating voltage 220 kV.

REFERENCES

1. Electromagnetics, Kraus.
2. Elements of Power System Analysis, W.D. Stevenson, Jr., 1962.
3. The Transmission and Distribution of Electrical Energy, H. Cotton, The English University Press
Ltd. 1958.
4. Principles of Electric Power Transmission, H. Waddicor, Chapman and Hall, London, 5th ed.,
1964.

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