A 20km three phase transmission line is rated at 250kV (Line to line). The sending line...
A 20km three phase transmission line is rated at 250kV (Line to line). The sending line current IS is 340 - j156 A. The sending bus is at the rated voltage. The ABCD parameters for this line are:
A = 1 B = 3.7 + j30 C = 0 D = 1
Find the magnitude of the line to line voltage at the receiving bus (VR-LL) in kV.Use 2 decimal places in your answer.
Hint: Assume the line to neutral sending voltage has a voltage angle of 0 degrees
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A 20km three phase transmission line is rated at 250kV (Line to
line). The sending line...
There is a problem regarding power system. A 190km three phase transmission line is rated at...
There is a problem regarding power system.
A 190km three phase transmission line is rated at 745kV (Line to line). The receiving bus is at the rated voltage, with the voltage phase angle at 0 degrees. The receiving current is 1,15828.24 A. The ABCD parameters for this line are: B = 72.42281.40 C = 8.856x10-3285.34 A = 0.826520.135 0.826520.135 D = Find the magnitude of the line sending current (Is) in Amperes.
A short 3-phase, 33-kV power transmission line delivers a load of 7-MW at a power factor...
A short 3-phase, 33-kV power transmission line delivers a load of 7-MW at a power factor of 0.85 lagging and 33-kV. If the series impedance of the line is 20+j30 Ohms/phase, calculate The ABCD constants (parameters) The sending end voltage The load angle The voltage regulation The transmission efficiency
A 132 kV, 55 MVA, 60 Hz, three-phase, power transmission line is 100 km (62. 1...
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 What is the per phase total series impedance and shunt admittance of the line? Should the line be modeled as a short, medium or long line? Calculate the ABCD constants of the line. Calculate the sending end voltage and current if the line is supplying rated...
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...
PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase ...
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...
kV/phase, 60 Hz, lossless short transmission line has a short-circuit power of 500 MVA/phase. Consider 7. A a unity power factor load connected at the receiving end. Assume that the sending end volta...
kV/phase, 60 Hz, lossless short transmission line has a short-circuit power of 500 MVA/phase. Consider 7. A a unity power factor load connected at the receiving end. Assume that the sending end voltage is equal to the nominal voltage. a. Determine the maximum active power this line can transmit (5 points) b. Determine the reactance of the line (5 points) c. Using basic equations of circuit analysis, show that the magnitude of the receiving end voltage (VR) is approximately 71%...
3.8 A 275 kV three-phase transmission line of length 96 km is rated at 800 A....
3.8 A 275 kV three-phase transmission line of length 96 km is rated at 800 A. The values of resistance, inductance and capacitance per phase per kilometre are 0.078 12, 1.056 mH and 0.029 F, respectively. The receiving-end voltage is 275 kV when full load is transmitted at 0.9 power factor lagging. Calculate the sending-end voltage and current, and the transmission efficiency, and com- pare with the answer obtained by the short-line representation. Use the nomi- nal n and T...
A single-circuit, 50-Hz, 3-phase transmission line is 150 km long. The line is connected to supply...
A single-circuit, 50-Hz, 3-phase transmission line is 150 km long. The line is connected to supply a load of 30 MVA at 0.85 pf lag and 138 kV. The line constants are : R = 0.186 ohm/km, L = 2.60 mH/km, and C = 0.012 μF/km. Using nominal π representation calculate : (a) the ABCD constants of the line. (b) the sending end voltage when supplying (i) no load, and (ii) the above load at the receiving end at the...
Note Unless otherwise specified, three phase systems are rated in terms of their line-to-line rms voltages So, for instance, a three-phase 230 kV transmission line has an rms phase voltage of 230/V3...
Note Unless otherwise specified, three phase systems are rated in terms of their line-to-line rms voltages So, for instance, a three-phase 230 kV transmission line has an rms phase voltage of 230/V3 kV. If you encounter a three-phase system specified with two voltages, e.g., 480/277 V, that implies that the line-to-line rms voltage is 480 V and the rms phase voltage is 277 v. Problem 8 The line-to-line voltage of a three-phase transmission line is Vbc-120 2.20° kV. Suppose 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. 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...
There is a problem regarding power system.
A 190km three phase transmission line is rated at 745kV (Line to line). The receiving bus is at the rated voltage, with the voltage phase angle at 0 degrees. The receiving current is 1,15828.24 A. The ABCD parameters for this line are: B = 72.42281.40 C = 8.856x10-3285.34 A = 0.826520.135 0.826520.135 D = Find the magnitude of the line sending current (Is) in Amperes.
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...
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...
kV/phase, 60 Hz, lossless short transmission line has a short-circuit power of 500 MVA/phase. Consider 7. A a unity power factor load connected at the receiving end. Assume that the sending end voltage is equal to the nominal voltage. a. Determine the maximum active power this line can transmit (5 points) b. Determine the reactance of the line (5 points) c. Using basic equations of circuit analysis, show that the magnitude of the receiving end voltage (VR) is approximately 71%...
3.8 A 275 kV three-phase transmission line of length 96 km is rated at 800 A. The values of resistance, inductance and capacitance per phase per kilometre are 0.078 12, 1.056 mH and 0.029 F, respectively. The receiving-end voltage is 275 kV when full load is transmitted at 0.9 power factor lagging. Calculate the sending-end voltage and current, and the transmission efficiency, and com- pare with the answer obtained by the short-line representation. Use the nomi- nal n and T...
Note Unless otherwise specified, three phase systems are rated in terms of their line-to-line rms voltages So, for instance, a three-phase 230 kV transmission line has an rms phase voltage of 230/V3 kV. If you encounter a three-phase system specified with two voltages, e.g., 480/277 V, that implies that the line-to-line rms voltage is 480 V and the rms phase voltage is 277 v. Problem 8 The line-to-line voltage of a three-phase transmission line is Vbc-120 2.20° kV. Suppose 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. 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...
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