A three phase 765kV, 60Hz, 250km line has the following positive sequence series impedance and shunt...
A three phase 765kV, 60Hz, 250km line has the following positive sequence series impedance and shunt admittance: ? = 0.0165 + ?0.3306 Ω/km and ? = ?4.674 × 10−6 S/km. Calculate ABCD parameters in a nominal Π circuit.
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A three phase 765kV, 60Hz, 250km line has the following positive
sequence series impedance and shunt...
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
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.
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the...
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the ABCD parameters (a) 20% (b)A 200 km, 230 kV, 50 Hz three-phase overhead transmission line has a positive-sequence series impedance z (0.08 + j0.48) Ω/km, and a positive-sequence shunt admittance y-j3.33 x 10T° S/km. At full load, the line delivers 250 MW at 0.99 power factor lagging...
[2000] Question 3: A 500-km, 500-kV, 60-Hz, uncompensated three-phase line has a positive sequence series j4.4...
[2000] Question 3: A 500-km, 500-kV, 60-Hz, uncompensated three-phase line has a positive sequence series j4.4 x 10-6 S/ impedance z - j0.35 ohm/km and a positive-sequence shunt admittance y km. If at full load, the line delivers 700 MW at unity power factor and at 475 kV, Calculate The nominal voltage level for this line a) the exact ABCD parameters for this line, the sending- end voltagnb transferred, and max theoretical power that can be transferred, and c) d)...
4. A 500 km, 500kV,60 Hz three-phase transmission line has a positive sequence series impedance z...
4. A 500 km, 500kV,60 Hz three-phase transmission line has a positive sequence series impedance z =j 0.38.2/km and a shunt admittance y =j 4.0 x 10-6S/km. Line losses are neglected. a. Calculate the line's characteristic impedance Zc, the propagation constant y and the exact ABCD parameters of the line... b. Calculate the surge impedance loading (SIL) in MW and the maximum power that the line can deliver at rated voltage C. At full load the line delivers 1000 M...
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...
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 three-phase transmission line is 200 km long. lt has a total series impedance of 25+j110)Ω...
A three-phase transmission line is 200 km long. lt has a total series impedance of 25+j110)Ω Per Phase and a total shunt admittance ofj5x 10 Ω. It delivers 180 MW at 275 kV and 0.8 power factor lagging to a load connected at the receiving end. Using the medium π model of the line, determine the voltage, current, real power, reactive power and power factor at the sending end of the line.
Question #4 A 60-Hz, three-phase, transmission line is 210 km long. It has a total series...
Question #4 A 60-Hz, three-phase, transmission line is 210 km long. It has a total series impedance of (0.06 +0.053) 2/km and a shunt admittance of j5.6 x 10-6 S/km. The supply provides 200MW (P) at 275kV (line voltage i.e. Vs), with 0.9 power-factor lagging (i.e. pfs). Using the nominal-T approximation, (i) ABCD parameters (ii) Receiving end voltage and current (iii) Receiving end power and power factor; (iv) Line voltage regulation (v) line efficiency (vi) Propagation constant (vii) Attenuation constant
Question #4 A 60Hz, threephase, transmission line is 210 km long. It has a total series...
Question #4 A 60Hz, threephase, transmission line is 210 km long. It has a total series impedance of (0.06 +0.053) S2/km and a shunt admittance of j5.6 x 100 S/km. The supply provides 200MW (P) at 275kV (line voltage i.e. V.), with 0.9 powerfactor lagging (i.e. pf). Using the nominalT approximation, (1) ABCD parameters (ii) Receiving end voltage and current (iii) Receiving end power and power factor; (iv) Line voltage regulation (v) line efficiency (vi) Propagation constant (vii) Attenuation constant
A simple 3 phase 2 port symmetrical π network has a series impedance of 10∠30⁰, and...
A simple 3 phase 2 port symmetrical π network has a series impedance of 10∠30⁰, and each shunt admittance 2∠30⁰ mS. The network has an output load of 50MW at 66kV with 0.9 lagging power factor. Given that , calculate: a) The ABCD parameters b) The voltage, current and power factor at supply side
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.
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the ABCD parameters (a) 20% (b)A 200 km, 230 kV, 50 Hz three-phase overhead transmission line has a positive-sequence series impedance z (0.08 + j0.48) Ω/km, and a positive-sequence shunt admittance y-j3.33 x 10T° S/km. At full load, the line delivers 250 MW at 0.99 power factor lagging...
[2000] Question 3: A 500-km, 500-kV, 60-Hz, uncompensated three-phase line has a positive sequence series j4.4 x 10-6 S/ impedance z - j0.35 ohm/km and a positive-sequence shunt admittance y km. If at full load, the line delivers 700 MW at unity power factor and at 475 kV, Calculate The nominal voltage level for this line a) the exact ABCD parameters for this line, the sending- end voltagnb transferred, and max theoretical power that can be transferred, and c) d)...
4. A 500 km, 500kV,60 Hz three-phase transmission line has a positive sequence series impedance z =j 0.38.2/km and a shunt admittance y =j 4.0 x 10-6S/km. Line losses are neglected. a. Calculate the line's characteristic impedance Zc, the propagation constant y and the exact ABCD parameters of the line... b. Calculate the surge impedance loading (SIL) in MW and the maximum power that the line can deliver at rated voltage C. At full load the line delivers 1000 M...
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...
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 three-phase transmission line is 200 km long. lt has a total series impedance of 25+j110)Ω Per Phase and a total shunt admittance ofj5x 10 Ω. It delivers 180 MW at 275 kV and 0.8 power factor lagging to a load connected at the receiving end. Using the medium π model of the line, determine the voltage, current, real power, reactive power and power factor at the sending end of the line.
Question #4 A 60-Hz, three-phase, transmission line is 210 km long. It has a total series impedance of (0.06 +0.053) 2/km and a shunt admittance of j5.6 x 10-6 S/km. The supply provides 200MW (P) at 275kV (line voltage i.e. Vs), with 0.9 power-factor lagging (i.e. pfs). Using the nominal-T approximation, (i) ABCD parameters (ii) Receiving end voltage and current (iii) Receiving end power and power factor; (iv) Line voltage regulation (v) line efficiency (vi) Propagation constant (vii) Attenuation constant
Question #4 A 60Hz, threephase, transmission line is 210 km long. It has a total series impedance of (0.06 +0.053) S2/km and a shunt admittance of j5.6 x 100 S/km. The supply provides 200MW (P) at 275kV (line voltage i.e. V.), with 0.9 powerfactor lagging (i.e. pf). Using the nominalT approximation, (1) ABCD parameters (ii) Receiving end voltage and current (iii) Receiving end power and power factor; (iv) Line voltage regulation (v) line efficiency (vi) Propagation constant (vii) Attenuation constant
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