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).

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 5.37P

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