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Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter4: Transmission Line Parameters
Section: Chapter Questions
Problem 4.28P: For the case of double-circuit, bundle-conductor lines, the same method indicated in Problem 4.27...
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(b)
A three-phase transposed single line is composed of one ACSR with the specification
of 1,431,000 cmil and 47/7-Bobolink's conductor type per phase with horizontal
spacing of 11 m as shown in Figure Q3(b). The conductors have a diameter of 3.625
cm and GMR of 1.439 cm. The link is to be replaced by a three-conductor bundled of
ACSR with the specification of 477,000-cmil and 26/7-Hawk's conductor type per phase
with horizontal spacing of 14 m as measured from the center of the bundles as shown in
Figure Q3(b).
a
D12 = 11 m
D23 = 11 m
D13 = 22 m-
(i)
45 +
D12 = 14 m-
-D23 = 14 m-
D13 = 28 m-
(ii)
Figure Q3(b): Conductor layout of three phase transmission line (i) single conductor (ii)
three-buddle conductors
(i)
Three-conductors bundled have a diameter of 2.1793 cm and GMR of 0.8839
cm. The spacing between the conductors in the bundle is 45 cm. Compare
between the individual and three-conductor bundled for three phase transmission
line and include the justification of the parameter changes based on the
percentage change in the inductance.
(ii)
Base on simple schematic diagram, briefly describes the criteria and
characteristic of short and medium transmission line model.
Transcribed Image Text:(b) A three-phase transposed single line is composed of one ACSR with the specification of 1,431,000 cmil and 47/7-Bobolink's conductor type per phase with horizontal spacing of 11 m as shown in Figure Q3(b). The conductors have a diameter of 3.625 cm and GMR of 1.439 cm. The link is to be replaced by a three-conductor bundled of ACSR with the specification of 477,000-cmil and 26/7-Hawk's conductor type per phase with horizontal spacing of 14 m as measured from the center of the bundles as shown in Figure Q3(b). a D12 = 11 m D23 = 11 m D13 = 22 m- (i) 45 + D12 = 14 m- -D23 = 14 m- D13 = 28 m- (ii) Figure Q3(b): Conductor layout of three phase transmission line (i) single conductor (ii) three-buddle conductors (i) Three-conductors bundled have a diameter of 2.1793 cm and GMR of 0.8839 cm. The spacing between the conductors in the bundle is 45 cm. Compare between the individual and three-conductor bundled for three phase transmission line and include the justification of the parameter changes based on the percentage change in the inductance. (ii) Base on simple schematic diagram, briefly describes the criteria and characteristic of short and medium transmission line model.
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