1. A-345-kV, three phase transmission line is 180 km long. The series impedance is z = 0.04 +j0.42 per phase per km, and the shunt admittance is y=j5 x 10-6 siemens per phase per km. The sending end voltage is 345 kV, and the sending end current 400A at 0.95 power factor lagging. Consider the sending end phase voltage as reference and find, a) The ABCD parameters of the line b) Efficiency of transmission c) The voltage regulation of the line Assume a л-model for the medium length line.

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
Chapter5: Transmission Lines: Steady-state Operation
Section: Chapter Questions
Problem 5.25P
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1. A-345-kV, three phase transmission line is 180 km long. The series impedance is z =
0.04 +j0.42 per phase per km, and the shunt admittance is y=j5 x 10-6 siemens per phase
per km. The sending end voltage is 345 kV, and the sending end current 400A at 0.95
power factor lagging. Consider the sending end phase voltage as reference and find,
a) The ABCD parameters of the line
b) Efficiency of transmission
c) The voltage regulation of the line
Assume a л-model for the medium length line.
Transcribed Image Text:1. A-345-kV, three phase transmission line is 180 km long. The series impedance is z = 0.04 +j0.42 per phase per km, and the shunt admittance is y=j5 x 10-6 siemens per phase per km. The sending end voltage is 345 kV, and the sending end current 400A at 0.95 power factor lagging. Consider the sending end phase voltage as reference and find, a) The ABCD parameters of the line b) Efficiency of transmission c) The voltage regulation of the line Assume a л-model for the medium length line.
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