8. A medium single phase transmission line 100km long has resistance/km 0.250, reactance/km 0.802, susceptance/km 14 × 10-6 siemen and receiving end line voltage 66,000V. Assuming that the total capacitance of the line is localized at the receiving end alone, determine i) the sending end current, ii) sending end voltage, iii) regulation, iv) supply power factor. The line is delivering 15000 kW at 0.8 power factor lagging.

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 5.11P: A 40-km, 220-kV, 60-Hz, three-phase overhead transmission line has a per-phase resistance of...
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6. A single phase overhead transmission line delivers 1100 KW at 33 KV at 0.8 p.f.
lagging. The total resistance and inductive reactance of the line are 10 2 and 15
respectively. Determine: i) sending end voltage ii) sending end power factor and iii)
transmission efficiency.
7. An overhead 3- phase transmission line delivers 5000 KW at 22 kV at 0.8 p.f. lagging.
The resistance and reactance of each conductor are 4 and 6 respectively.
Determine i) sending end voltage ii) percentage regulation and iii) transmission
efficiency.
8. A medium single phase transmission line 100km long has resistance/km 0.259,
reactance/km 0.892, susceptance/km 14 × 10-6 siemen and receiving end line voltage
66,000V. Assuming that the total capacitance of the line is localized at the receiving
end alone, determine i) the sending end current, ii) sending end voltage, iii) regulation,
iv) supply power factor. The line is delivering 15000 kW at 0.8 power factor lagging.
9. A 3-phase, 50Hz overhead transmission line 100km long has resistance/km/phase 0.1
2, inductive reactance/km/phase 0.2 , capacitive susceptance/km/phase 0.04 × 10-4
siemen. determine i) the sending end current, ii) sending end voltage, iii) sending end
power factor and iv) transmission efficiency when supplying a balance load of 10000
kW at 66 kV, p.f. 0.8 lagging using nominal T method.
10. A 100km long, 3-phase, 50Hz overhead transmission line has resistance/km/phase
0.1, reactance/km/phase 0.52, suceptance/km/phase 10 × 10-6 S. If the line
supplies load of 20 MW at 0.9 p.f. lagging at 66 kV at the receiving end, determine by
nominal method i) sending end power factor ii) regulation and iii) transmission
efficiency
Transcribed Image Text:6. A single phase overhead transmission line delivers 1100 KW at 33 KV at 0.8 p.f. lagging. The total resistance and inductive reactance of the line are 10 2 and 15 respectively. Determine: i) sending end voltage ii) sending end power factor and iii) transmission efficiency. 7. An overhead 3- phase transmission line delivers 5000 KW at 22 kV at 0.8 p.f. lagging. The resistance and reactance of each conductor are 4 and 6 respectively. Determine i) sending end voltage ii) percentage regulation and iii) transmission efficiency. 8. A medium single phase transmission line 100km long has resistance/km 0.259, reactance/km 0.892, susceptance/km 14 × 10-6 siemen and receiving end line voltage 66,000V. Assuming that the total capacitance of the line is localized at the receiving end alone, determine i) the sending end current, ii) sending end voltage, iii) regulation, iv) supply power factor. The line is delivering 15000 kW at 0.8 power factor lagging. 9. A 3-phase, 50Hz overhead transmission line 100km long has resistance/km/phase 0.1 2, inductive reactance/km/phase 0.2 , capacitive susceptance/km/phase 0.04 × 10-4 siemen. determine i) the sending end current, ii) sending end voltage, iii) sending end power factor and iv) transmission efficiency when supplying a balance load of 10000 kW at 66 kV, p.f. 0.8 lagging using nominal T method. 10. A 100km long, 3-phase, 50Hz overhead transmission line has resistance/km/phase 0.1, reactance/km/phase 0.52, suceptance/km/phase 10 × 10-6 S. If the line supplies load of 20 MW at 0.9 p.f. lagging at 66 kV at the receiving end, determine by nominal method i) sending end power factor ii) regulation and iii) transmission efficiency
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