6. A short 3-phase, 34-kV power transmission line delivers a load of 10-MW at a powerfactor of 0.9 lagging and 34-kV. If the series impedance of the line is 10+j15Q/ phasecalculate;a. The ABCD constantsb. The sending end voltage Vsc. The sending end current Isd. The line's percentage voltage regulatione. The transmission efficiencyj. The power angle 8-ignore series resistance!k. The steady-state stability limit (maximum power transfer)-ignore series resistance!

6. A short 3-phase, 34-kV power transmission line delivers a load of 10-MW at a power factor of 0.9 lagging and 34-kV. If the series impedance of the line is 10+j15Q/ phase calculate; a. The ABCD constants b. The sending end voltage Vs c. The sending end current Is

6. A short 3-phase, 34-kV power transmission line delivers a load of 10-MW at a power factor of 0.9 lagging and 34-kV. If the series impedance of the line is 10+j15Q/ phase calculate; a. The ABCD constants b. The sending end voltage Vs c. The sending end current Is

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Which termination would result to a phase change of 180 degrees at the load if Zo = 100 ohm? a. 50 ohm b. short circuit c. 75 ohm d. all of these What is the purpose of impedance matching? a. maximum return loss b. maximum SWR c. maximum load power d. maximum reflection A short piece of transmission line that may be open or shorted and used for impedance matching purposes. a. converter b. decoder c. stub d. transformer
A 400 km long, 50 Hz transmission line having series resistance and inductance of 0.12/km and ImH/km, and shunt capacitance of 0.01µF/km connects a generator and a load. The load is consuming 100 MW at 220 kV and 0.8 power factor lagging. Find the voltage and current at the sending end, and the voltage regulation of the line. Assume distributed parameter model of the line.
a. Determine the sending-end voltage, current, power factor, and real power. 2= 40 +j175 0 and a total shunt admittance Y i10'S. The line delivers 3 MW at 220 kV and 0.9 power factor lagging. 9.34 A three-phase, 60-Hz, 300-mi transmission line has a total series impedance a. Determine the sending-end voltage, current, power factor, and real power.
A 3-phase, overhead transmission line has a total series impedance per phase of 200 ohms and a total shunt admittance of 0.0013 siemens per phase. The line delivers a load of 80 MW at a 0.8 pf lagging and a 220 kV between the lines. Determine the sending end line voltage and current by Rigorous method.
2. A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0-85 p.f. lagging by means of a transmission line. The series impedance of a single conductor is (20 + j52) ohms and the total phases-neutral admit- tance is 315 microsiemens. Shunt leakage may be neglected. Using the nominalT approximation, calculate the line voltage at the sending end of the line. If the load is removed and the sending end voltage remains constant, find the percentage rise in voltage at the receiving end.
The ABCD constants of a three-phase, 345-kV transmission line are:A = D = 0.98182 + j0.0012447.B = 4.035 + j58.947.C = j0.00061137.The line delivers 400 MVA at 0.8 lagging power factor at 345 kV. Determine the sending end quantities, voltage regulation, and transmission efficiency.Hint: Efficiency is equal to the ratio of active power at the receiving end to the active power at the sending end.
In the following network, the voltage magnitudes at all buses are equal to 1 p.u., the voltage phase angles are very small, and the line resistances are negligible. All the line reactances are equal to j1 p.u. (1) (2. P₂ = 0.1 p.u. P3 = 0.2 p.u. The voltage phase angle 83 in radian at bus 3 is (Assume one of the generator bus as slack bus and sin-¹ (0.1) = 0.1 rad) (a) -0.1 (b) -0.2 (c) 0.1 (d) 0
2. A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence series impedance z = 0.07 + j0.58 ohms/km and a positive-sequence shunt admittance y = j4.33 x 10^-6 S/ km. At full load, the line delivers 350 MW at 0.95 pf lagging and at 220 kV. Using the nominal pi circuit, calculate: (a) the ABCD parameters (b) the sending-end voltage and current, and (c) the percent voltage regulation.
d) Calculate the per unit voltage drop on the transmission line e) Calculate also the sending end voltage Use an overall base of 100 MVA.
Problem 1 a- Explain the meaning of the term "bundle conductor transmission line" and discuss the effects of its use on the electrical performance of a high voltage electric transmission line. b- Consider an experimental 1800 kV three phase bundle-conductor line with parameters A= 0.95 and B=j 70. Determine the value of the parameter C of the line. Assume that the line is delivering 2,000 MVA at receiving end whose voltage of 1750 kV and unity power factor. Determine the sending end voltage of the line. d- C- Determine the sending end current of the line.
The parameters of a three-phase line 200 km long are resistance/km =0.15 , inductive/km=0.5 and capacitive susceptance/km 2 x 10^6 ohm. The transmission line is delivering 50 MVA at 132 kV with power factor 0.85 lagging. Use nominal T method to determine; 1) sending end voltage 2) sending end current 3) sending end power factor 4) transmission efficiency and 5) voltage regulation.
9. Determine the transformer tap ratios when the receiving end voltage is equal to the sending end voltage. The high voltage line operates at 230kv and transmits 80MW at 0.8pf and the impedance of the line is (40 +j150) 2.