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.
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.
Introductory Circuit Analysis (13th Edition)
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Short Transmission Line
A short transmission line is a transmission line that has a length less than 80 kilometers, an operating voltage level of less than 20 kV, and zero capacitance effect.
Power Flow Analysis
Power flow analysis is a topic in power engineering. It is the flow of electric power in a system. The power flow analysis is preliminary used for the various components of Alternating Current (AC) power, such as the voltage, current, real power, reactive power, and voltage angles under given load conditions and is often known as a load flow study or load flow analysis.
Complex Form
A power system is defined as the connection or network of the various components that convert the non-electrical energy into the electric form and supply the electric form of energy from the source to the load. The power system is an important parameter in power engineering and the electrical engineering profession. The powers in the power system are primarily categorized into two types- active power and reactive power.
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Please question 8
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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