A thee-phase short transmission line is supplying a load of 250 MW at 0.8 power factor lagging. The voltage at the receiving end is kept constant at 230 kV. The resistance and reactance per phase of the line are 5 2 and 15 Ω respectively. (i) Calculate th
A thee-phase short transmission line is supplying a load of 250 MW at 0.8 power factor lagging. The voltage at the receiving end is kept constant at 230 kV. The resistance and reactance per phase of the line are 5Ω and 15 Ω respectively. (i) Calculate the voltage regulation. (ii) At what value of the power factor is the voltage regulation zero? Derive the expression used
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A thee-phase short transmission line is supplying a load of 250 MW at 0.8 power factor lagging. The voltage at the receiving end is kept constant at 230 kV. The resistance and reactance per phase of the line are 5 2 and 15 Ω respectively. (i) Calculate th
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
The per-phase impedance of a short transmission line is (0.3+j0.4) Ω. The sending end line-to-line voltage is 3300V, and the load at the receiving end is 300 kiloWatts per phase at 0.8 power factor la...
The per-phase impedance of a short transmission line is (0.3+j0.4) Ω. The sending end line-to-line voltage is 3300V, and the load at the receiving end is 300 kiloWatts per phase at 0.8 power factor lagging. Calculate: (a) The receiving end voltage (b) The line current (c) The sending end power factor (d) The power loss.
A short 3-phase, 34-kV power transmission line delivers a load of 10-MW at a power factor...
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+j15 Ohm/phase calculate; 1
A 3-phase 60 Hz 50 km transmission line delivers 20 MW of power to a load...
A 3-phase 60 Hz 50 km transmission line delivers 20 MW of power to a load at 69 kV and a power factor of 0.8 lagging. The line has the following parameters r = 0.1112/km L = 1.11 mH/km C = negligible Determine: The line impedance. (4 Marks) The "receiving end" phase voltage and current (7 Marks) The "sending end" voltage and current (10 Marks) The voltage regulation. (4 Marks)
Show the solution for the following problem 1. A short, 230 kV transmission line has an...
Show the solution for the following problem 1. A short, 230 kV transmission line has an impedance of 5 cis 78 ohms. The load at the receiving end is 100 MW at 230 kV, 85% lagging power factor. What is the voltage at the sending end? a. 235.43 kV b. 226.3 kV c. 231.78 kV d. 238.21 kV 2. A 66 kv medium length transmission line delivers a load of 10 MW at 66 kv and 80% lagging P.F. the...
A 230-kV, three-phase transmission line has a per phase series impedance of z = 0.05j0.45 2...
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...
A 3-phase 138-kv transmission line is connected to a 49 MW load at .85 lagging power...
A 3-phase 138-kv transmission line is connected to a 49 MW load at .85 lagging power factor. The line constants of the 52-mile long line are Z = 95 L 78 degree ohm and Y=.001 L90 degree S. Using the nominal T Circuit representation, calculate the A, B, C, and D constants of the line Sending-end voltage Sending-end current Sending-end power factor Efficiency of transmission
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%...
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...
3. A 345-KV, three-phase transmission line delivers 500MVA, 0.866 power factor lagging, to a three phase...
3. A 345-KV, three-phase transmission line delivers 500MVA, 0.866 power factor lagging, to a three phase wve-connected load connected to its receiving-end terminals, the voltage at the receiving end is 345kV. a) Find the complex load impedance per phase. b) Find the real and reactive power per phase. 15 pts.
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+j15 Ohm/phase calculate; 1
A 3-phase 60 Hz 50 km transmission line delivers 20 MW of power to a load at 69 kV and a power factor of 0.8 lagging. The line has the following parameters r = 0.1112/km L = 1.11 mH/km C = negligible Determine: The line impedance. (4 Marks) The "receiving end" phase voltage and current (7 Marks) The "sending end" voltage and current (10 Marks) The voltage regulation. (4 Marks)
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...
A 3-phase 138-kv transmission line is connected to a 49 MW load at .85 lagging power factor. The line constants of the 52-mile long line are Z = 95 L 78 degree ohm and Y=.001 L90 degree S. Using the nominal T Circuit representation, calculate the A, B, C, and D constants of the line Sending-end voltage Sending-end current Sending-end power factor Efficiency of transmission
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%...
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...
3. A 345-KV, three-phase transmission line delivers 500MVA, 0.866 power factor lagging, to a three phase wve-connected load connected to its receiving-end terminals, the voltage at the receiving end is 345kV. a) Find the complex load impedance per phase. b) Find the real and reactive power per phase. 15 pts.
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