A 132 kV, 55 MVA, 60 Hz, three-phase, power transmission line is 100 km (62. 1...
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A 132 kV, 55 MVA, 60 Hz, three-phase, power transmission line is 100 km (62. 1 mi) long, and has the following characteristics:
r = 0.25 Ω/km
x = 0.5 Ω/km
y = j*S/km
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What is the per phase total series impedance and shunt admittance of the line?
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Should the line be modeled as a short, medium or long line?
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Calculate the ABCD constants of the line.
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Calculate the sending end voltage and current if the line is supplying rated voltage and power at 0.8 pf lagging. Note that the parameters given in the question are load parameters (receiving-end).
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What is the voltage regulation of the line?
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Calculate sending end voltage and current if the line is modeled by a short line model.
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What is the voltage regulation of part f?
( there is no more information that is the question)
Homework Answers
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A 132 kV, 55 MVA, 60 Hz, three-phase, power transmission line is
100 km (62. 1...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 Ohm/km, x = 0.88 Ohm/km, y = 4.1 * 10^-6 s/km. Calculate the ABCD constants of this transmission line. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? What is the voltage regulation of the transmission line for the conditions in question 11. What is the efficiency of the...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 ohm/km, x = 0.88 ohm/km, y = 4.1 * 10^-6 S/km. 10. Calculate the ABCD constants of this transmission line. 11. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? 12. What is the voltage regulation of the transmission line for the conditions in question 11. 13. What is...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 Ohm/km, x = 0.88 Ohm/km, y = 4.1*10^-6 S/km. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? What is the voltage regulation of the transmission line for the conditions in question 11.
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PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase series impedance of z-0.05 +j0.45 Ω per km, and a per phase shunt admittance of y 3.4x10-6 Siemens per km. The line delivers (at the receiving end) 200 MVA, 0.8 lagging power factor at 220 kV. Now consider two cases: A- Assume that shunt parameters of the transmission line are ignored (i.e. even if this is a medium length transmission line, under...
Problem 2: A 345 kV, 60 Hz, three-phase characteristic parameters of the transmission line are: transmission...
Problem 2: A 345 kV, 60 Hz, three-phase characteristic parameters of the transmission line are: transmission line is 130 km long. The r= 0.036 ?/km L = 0.8 x 10-3 H/km C = 0.0112 x 10-6 F/km The receiving end load is 270 MVA with 0.8 PF lagging at 325 kV. (k) What is the total series impedance of this transmission line? (5 points) () What is the total shunt admittance of this transmission line? (5 points) (m) Calculate the...
A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence series impedance ?=0.08+?0.48 Ω/km and a positive-sequence...
A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence
series impedance ?=0.08+?0.48 Ω/km and a positive-sequence shunt
admittance ?=?3.33×10−6 S/km. At full load, the line delivers 250
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A 345 kV, three phase transmission line is 130 km long. The series impedance is z = 0.036 + j0.3 Ω per phase/km and the shunt admittance is y = j4.22 x 10-6 S per phase/km. The sending end voltage is 345 kV and the sending end current is 400 A at 0.95 power factor lagging. Find the voltage, current and power at the receiving end and the voltage regulation.
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A 220-kv, 150 MVA, 60-Hz three phase transmission line is 50 km long. The characteristic parameters...
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A 3-phase, 50 Hz, long 300 Km transmission line delivers 60 MVA at 124 kV and...
A 3-phase, 50 Hz, long 300 Km transmission line delivers 60 MVA at 124 kV and 0-8 p.f. lagging. The total resistance 25.3 ohm and total reactance is 66.5 ohm and the admittance due to capacitance is 0.442*10-3 mho. Determine: (i) (ii) (iii) A,B, C and D constants of long T.L Sending end voltage, current and power factor Transmission efficiency, Voltage regulation
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 Ohm/km, x = 0.88 Ohm/km, y = 4.1 * 10^-6 s/km. Calculate the ABCD constants of this transmission line. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? What is the voltage regulation of the transmission line for the conditions in question 11. What is the efficiency of the...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 ohm/km, x = 0.88 ohm/km, y = 4.1 * 10^-6 S/km. 10. Calculate the ABCD constants of this transmission line. 11. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? 12. What is the voltage regulation of the transmission line for the conditions in question 11. 13. What is...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 Ohm/km, x = 0.88 Ohm/km, y = 4.1*10^-6 S/km. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? What is the voltage regulation of the transmission line for the conditions in question 11.
PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase series impedance of z-0.05 +j0.45 Ω per km, and a per phase shunt admittance of y 3.4x10-6 Siemens per km. The line delivers (at the receiving end) 200 MVA, 0.8 lagging power factor at 220 kV. Now consider two cases: A- Assume that shunt parameters of the transmission line are ignored (i.e. even if this is a medium length transmission line, under...
Problem 2: A 345 kV, 60 Hz, three-phase characteristic parameters of the transmission line are: transmission line is 130 km long. The r= 0.036 ?/km L = 0.8 x 10-3 H/km C = 0.0112 x 10-6 F/km The receiving end load is 270 MVA with 0.8 PF lagging at 325 kV. (k) What is the total series impedance of this transmission line? (5 points) () What is the total shunt admittance of this transmission line? (5 points) (m) Calculate the...
A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence
series impedance ?=0.08+?0.48 Ω/km and a positive-sequence shunt
admittance ?=?3.33×10−6 S/km. At full load, the line delivers 250
MW at 0.99 pf lagging and at 220 kV. Using the nominal ? circuit,
calculate:
a. The ABCD parameters,
b. The sending-end voltage and current,
c. The percent voltage regulation.
A 230-kV, three-phase transmission line has a per phase series impedance of z = 0.05j0.45 2 per km and a per phase shunt admittance ofy = j3.4 x 10-6 siemens per km. The line is 80 km long. Using the nominal r model, determine (a) The transmission line ABCD constants. Find the sending end voltage and current, voltage regulation, the sending end power and the transmission efficiency when the line delivers (b) 200 MVA, 0.8 lagging power factor at 220...
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