5.14 5.15 A 500-km, 500-kV, 60-Hz, uncompensated three-phase line has a positive- sequence series impedance z = 0.03 +0.35 2/km and a positive- sequence shunt admittance y = j4.4 × 106 S/km. Calculate: (a) Z (b) (yl), and (c) the exact ABCD parameters for this line. At full load, the line in Problem 5.14 delivers 900 MW at unity power factor and at 475 kV. Calculate: (a) the sending-end voltage, (b) the sending-end current, (c) the sending-end power factor, (d) the full-load line losses, and (e) the percent voltage regulation.

5.14 5.15 A 500-km, 500-kV, 60-Hz, uncompensated three-phase line has a positive- sequence series impedance z = 0.03 +0.35 2/km and a positive- sequence shunt admittance y = j4.4 × 106 S/km. Calculate: (a) Z (b) (yl), and (c) the exact ABCD parameters for this line. At full load, the line in Problem 5.14 delivers 900 MW at unity power factor and at 475 kV. Calculate: (a) the sending-end voltage, (b) the sending-end current, (c) the sending-end power factor, (d) the full-load line losses, and (e) the percent voltage regulation.

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 4.33MCQ

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Transmission line conductance is usually neglected in power system studies. True False
Considering two parallel three-phase circuits that are close together, when calculating the equivalent series-impedance and shunt-admittance matrices, mutual inductive and capacitive couplings between the two circuits can be neglected. True False
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Question 3
A 60-Hz, 230-mile, three-phase overhead transmission line has a series impedance z = 0.8431279.04° 0/mi and a shunt admittance y = 5.105 x 10-6290° S/mi. The load at the receiving end is 174 MW at unity power factor and at 215 kV. Using per-unit calculations, determine the sending-end line-to-line voltage (in kV) and line current (in A). (Enter the magnitudes. Use a base of 174 MVA and 215 kV.) voltage 154.2 current x kv A
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