Question

Problem 3: (1 Mark) The conductor configuration of a bundled single-phase overhead transmission line is shown in Figure 1. Line X has its three conductors situated at the corners of an equilateral triangle with 10 cm spacing. Line Y has its three conductors arranged in a horizontal configuration with 10 cm spacing. All conductors are identical, solid-cylindrical conductors, each with a radius of 2 cm. Line X 10 cm ? 6 m Line Y 10 cm 10 cm Figure 1. Conductor configuration of the single-phase transmission line (a) Find the equivalent representation in terms of the geometric mean radius of each bundle and a separation that is the geometric mean distance. (b) Find the total inductance of the bundled single-phase overhead transmission line in mH/km. (c) Find the inductive reactances of both lines in per unit when each is 60 miles long, rated at 300 kV, 50 Hz, considering a system base of 100MVA.

          Problem 3: (1 Mark)
The conductor configuration of a bundled single-phase overhead transmission line is shown in
Figure 1. Line X has its three conductors situated at the corners of an equilateral triangle with 10
cm spacing. Line Y has its three conductors arranged in a horizontal configuration with 10 cm
spacing. All conductors are identical, solid-cylindrical conductors, each with a radius of 2 cm.
Line X
10 cm
?
6 m
Line Y
10 cm 10 cm
Figure 1. Conductor configuration of the single-phase transmission line
(a) Find the equivalent representation in terms of the geometric mean radius of each bundle
and a separation that is the geometric mean distance.
(b) Find the total inductance of the bundled single-phase overhead transmission line in
mH/km.
(c) Find the inductive reactances of both lines in per unit when each is 60 miles long, rated
at 300 kV, 50 Hz, considering a system base of 100MVA.

Problem 3: (1 Mark)
The conductor configuration of a bundled single-phase overhead transmission line is shown in
Figure 1. Line X has its three conductors situated at the corners of an equilateral triangle with 10
cm spacing. Line Y has its three conductors arranged in a horizontal configuration with 10 cm
spacing. All conductors are identical, solid-cylindrical conductors, each with a radius of 2 cm.
Line X
10 cm
?
6 m
Line Y
10 cm 10 cm
Figure 1. Conductor configuration of the single-phase transmission line
(a) Find the equivalent representation in terms of the geometric mean radius of each bundle
and a separation that is the geometric mean distance.
(b) Find the total inductance of the bundled single-phase overhead transmission line in
mH/km.
(c) Find the inductive reactances of both lines in per unit when each is 60 miles long, rated
at 300 kV, 50 Hz, considering a system base of 100MVA.

Added by Christopher C.

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