QUESTION 2 A 200 km, 275 kV, 50 Hz, three phase line has a positive sequence series impedance z = 0.05 + j0.452/km and a positive sequence shunt admittance y = j3.33 x 10-6 S/km. At full load, the line delivers at 270 kV, 250 MW on lagging power factor 0.85. Using the nominal i circuit (a) Analyse the performance of the transmission system in term of the percentage voltage regulation and efficiency (b) If the transmission line in Q2(a) is delivers at 270 kV, 294 MVA on unity power factor to the load, compare and discuss the new voltage regulation of the transmission line with the one obtained in Q2 (a).
QUESTION 2 A 200 km, 275 kV, 50 Hz, three phase line has a positive sequence series impedance z = 0.05 + j0.452/km and a positive sequence shunt admittance y = j3.33 x 10-6 S/km. At full load, the line delivers at 270 kV, 250 MW on lagging power factor 0.85. Using the nominal i circuit (a) Analyse the performance of the transmission system in term of the percentage voltage regulation and efficiency (b) If the transmission line in Q2(a) is delivers at 270 kV, 294 MVA on unity power factor to the load, compare and discuss the new voltage regulation of the transmission line with the one obtained in Q2 (a).
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:QUESTION 2
A 200 km, 275 kV, 50 Hz, three phase line has a positive sequence series impedance z=
0.05 + j0.452/km and a positive sequence shunt admittance y =j3.33 x 10-6 S/km.
At full load, the line delivers at 270 kV, 250 MW on lagging power factor 0.85. Using the
nominal i circuit
(a) Analyse the performance of the transmission system in term of the percentage voltage
regulation and efficiency
(b) If the transmission line in Q2(a) is delivers at 270 kV, 294 MVA on unity power factor
to the load, compare and discuss the new voltage regulation of the transmission line
with the one obtained in Q2 (a).
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