A 50 Hz, 138 kV, 3-phase transmission line is 225 km long. The distributed line parameters are: • Resistance (r): 0.169 Q2/km • Inductance (1): 2.093 mH/km . Capacitance (c): 0.01427 µF/km • Conductance (g): 0 The transmission line delivers 40 MW at 132 kV with a 95% lagging power factor. Calculate the following: 1. The sending-end voltage and current. 2. The efficiency of the transmission 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
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.13MCQ
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A 50 Hz, 138 kV, 3-phase transmission line is 225 km long. The distributed line parameters are:
•
Resistance (r): 0.169 Q2/km
•
Inductance (1): 2.093 mH/km
.
Capacitance (c): 0.01427 µF/km
•
Conductance (g): 0
The transmission line delivers 40 MW at 132 kV with a 95% lagging power factor. Calculate the
following:
1. The sending-end voltage and current.
2. The efficiency of the transmission line.
Transcribed Image Text:A 50 Hz, 138 kV, 3-phase transmission line is 225 km long. The distributed line parameters are: • Resistance (r): 0.169 Q2/km • Inductance (1): 2.093 mH/km . Capacitance (c): 0.01427 µF/km • Conductance (g): 0 The transmission line delivers 40 MW at 132 kV with a 95% lagging power factor. Calculate the following: 1. The sending-end voltage and current. 2. The efficiency of the transmission line.
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