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Q3. A two 3- phase transmission lines A & B have the following data: Vs =...
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
#2. The A B C D parameters of a 180 km transmission line are: A D-0.853 + j 0.016, B = (31.4 + j1...
#2. The A B C D parameters of a 180 km transmission line are: A D-0.853 + j 0.016, B = (31.4 + j137.0) Ω, C = (-5.00 + j855) x 10-6 S. The load at the receiving end is 100 MVA at 220 kV line to line and o.80 pf lagging. Compute (i) the sending end voltage, Vs (ii) Voltage Regulation (VR) of the line and (ii) the efficiency, n, of the line.
#2. The A B C D...
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 3-phase, 50 Hz overhead transmission line has the following constants
A 3-phase, 50 Hz overhead transmission line has the following constants : Resistance/phase = 9·6 Ω Inductance/phase = 0·097 mH Capacitance/phase = 0·765 μF If the line is supplying a balanced load of 24,000 kVA 0·8 p.f. lagging at 66 kV, calculate : (i) sending end current (ii) line value of sending end voltage (iii) sending end power factor (iv) percentage regulation (v) transmission efficiency
QUESTIONS 1- A 69-kV, three-phase transmission line is 20 km long. The line has a per...
QUESTIONS 1- A 69-kV, three-phase transmission line is 20 km long. The line has a per phase series impedance of 0,120 + 10,4325 per km. Detemine the sending end voltage, voltage regulation, the sending end power, and the transmission efficiency when the line delivers (a) 60 MVA, 0.8 lagging power factor at 60 kV. (b) 110 MW, unity power factor at 60 kV
A 220-kv, 150 MVA, 60-Hz three phase transmission line is 50 km long. The characteristic parameters...
A 220-kv, 150 MVA, 60-Hz three phase transmission line is 50 km long. The characteristic parameters of the transmission line are r-0.05 2/km x-0.88 /km 1. The voltag at the reeioransmisson line is215 kV What is the suppling end voltage if the line is supplying rated voltage at unity PF? What is the voltage regulation of the transmission line? What is the efficiency of the transmission line? a. b. c.
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-ph, 50 Hz overhead transmission line 100 km long delivers 20 MW at 0.9 p.f...
A 3-ph, 50 Hz overhead transmission line 100 km long delivers 20 MW at 0.9 p.f lagging and at 110 kV. The resistance and reactance per phase per km are (0.2) Ω and (j0.4) Ω respectively, while capacitive admittance per phase per km is (j2.5 * 10-6) siemen. Using nominal T circuit, Find: 1- Constants A, B, C, and D. 2- Sending end voltage. 3- Sending end current 4- Sending end power factor 5- Voltage regulation of this T.L. 6-...
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%...
#2. A 3-phase, 60-Hz transmission line is 140 miles long and has r :0.30 Ohms/mile, x...
#2. A 3-phase, 60-Hz transmission line is 140 miles long and has r :0.30 Ohms/mile, x =1.5 Ohms/mile, and the shunt admittance is 7.8 x 100900 mho /mile. The load at the receiving end of the line is 36 MVA at 220 kV and a power factor of 0.90 lagging (i)Find the ABCD parameters of the line. (i)Find the sending end phasor voltage, Vs and phasor current, Is iv)What is the real power, P and the reactive power Q at...
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
#2. The A B C D parameters of a 180 km transmission line are: A D-0.853 + j 0.016, B = (31.4 + j137.0) Ω, C = (-5.00 + j855) x 10-6 S. The load at the receiving end is 100 MVA at 220 kV line to line and o.80 pf lagging. Compute (i) the sending end voltage, Vs (ii) Voltage Regulation (VR) of the line and (ii) the efficiency, n, of the line.
#2. The A B C D...
QUESTIONS 1- A 69-kV, three-phase transmission line is 20 km long. The line has a per phase series impedance of 0,120 + 10,4325 per km. Detemine the sending end voltage, voltage regulation, the sending end power, and the transmission efficiency when the line delivers (a) 60 MVA, 0.8 lagging power factor at 60 kV. (b) 110 MW, unity power factor at 60 kV
A 220-kv, 150 MVA, 60-Hz three phase transmission line is 50 km long. The characteristic parameters of the transmission line are r-0.05 2/km x-0.88 /km 1. The voltag at the reeioransmisson line is215 kV What is the suppling end voltage if the line is supplying rated voltage at unity PF? What is the voltage regulation of the transmission line? What is the efficiency of the transmission line? a. b. c.
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...
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%...
#2. A 3-phase, 60-Hz transmission line is 140 miles long and has r :0.30 Ohms/mile, x =1.5 Ohms/mile, and the shunt admittance is 7.8 x 100900 mho /mile. The load at the receiving end of the line is 36 MVA at 220 kV and a power factor of 0.90 lagging (i)Find the ABCD parameters of the line. (i)Find the sending end phasor voltage, Vs and phasor current, Is iv)What is the real power, P and the reactive power Q at...
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