QUESTION 3 A 400 km, 138 kV, 60 Hz transmission line has the following distributed parameters: r = 0.106 02/km,x=0.493 2 /km, y=j3.36x10-6 S/km. Losses are neglected. (a) Compute the nominal equivalent circuit parameters and draw the circuit. Compute the corresponding ABCD parameters. (b) Find the surge impedance and surge impedance loading. (c) The line delivers 40 MW at 132 kV with a power factor of 0.95 lagging. Using the ABCD parameters, compute the sending end voltage, current and angle. Confirm using the nominal equivalent circuit, and the short line equivalent. (d) Draw the approximate voltage profile of this line for the following power delivered: 0 MW, 20 MW, 50 MW, and surge impedance loading. Indicate the methods available to maintain the voltages within the range of 0.95 and 1.05. 1/7
QUESTION 3 A 400 km, 138 kV, 60 Hz transmission line has the following distributed parameters: r = 0.106 02/km,x=0.493 2 /km, y=j3.36x10-6 S/km. Losses are neglected. (a) Compute the nominal equivalent circuit parameters and draw the circuit. Compute the corresponding ABCD parameters. (b) Find the surge impedance and surge impedance loading. (c) The line delivers 40 MW at 132 kV with a power factor of 0.95 lagging. Using the ABCD parameters, compute the sending end voltage, current and angle. Confirm using the nominal equivalent circuit, and the short line equivalent. (d) Draw the approximate voltage profile of this line for the following power delivered: 0 MW, 20 MW, 50 MW, and surge impedance loading. Indicate the methods available to maintain the voltages within the range of 0.95 and 1.05. 1/7
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:QUESTION 3
A 400 km, 138 kV, 60 Hz transmission line has the following distributed parameters:
r = 0.106 02/km,x=0.493 2 /km, y=j3.36x10-6 S/km. Losses are neglected.
(a) Compute the nominal equivalent circuit parameters and draw the circuit. Compute the
corresponding ABCD parameters.
(b) Find the surge impedance and surge impedance loading.
(c) The line delivers 40 MW at 132 kV with a power factor of 0.95 lagging. Using the ABCD
parameters, compute the sending end voltage, current and angle. Confirm using the nominal
equivalent circuit, and the short line equivalent.
(d) Draw the approximate voltage profile of this line for the following power delivered: 0 MW, 20
MW, 50 MW, and surge impedance loading. Indicate the methods available to maintain the
voltages within the range of 0.95 and 1.05.
1/7
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Step 1: The given transmission line has following specifications.
VIEWStep 2: The equivalent parameters of a 400km transmission line is
VIEWStep 3: The ABCD parameters of a transmission line is calculated as
VIEWStep 4: The surge impedance loading is
VIEWStep 5: The sending end voltage, current and load angle is calculated as
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