A 50 Hz three-phase transmission line is 300 km long t has a total series impedance of 23 + j 75 Q and a shunt admittance of j500 mS. It delivers 150 MW at 220 kV with a power factor of 0.88 lagging. Find the voltage at the sending end using: (a) short line approximation, (b) medium line (nominal pi) approximation, and (c) long line model.

A 50 Hz three-phase transmission line is 300 km long t has a total series impedance of 23 + j 75 Q and a shunt admittance of j500 mS. It delivers 150 MW at 220 kV with a power factor of 0.88 lagging. Find the voltage at the sending end using: (a) short line approximation, (b) medium line (nominal pi) approximation, and (c) long line model.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.26P: A small manufacturing plant is located 2 km down a transmission line, which has a series reactance...

See similar textbooks

Similar questions

A 220 kV, three phase transmission line is 50 km long. The resistance per phase is r 2 per km and the inductance per phase is L mH per km. The shunt capacitance is negligible. If the line supplies a three-phase load of 229 MVA at 0.8 power factor lagging at 220 kV with an efficiency of 97.13% and a voltage regulation of 4.7581%. Use the short line model to find the line resistance and inductance of the line.
1) A 60-Hz, ...-km, three-phase overhead transmission line has a series impedance z = 0.8431L79.04 ohm/km and a shunt admittance y = 5.105 × 106 L90 S/km. The load at the receiving end is 125 MW at unity power factor and at 215 KVLL. Determine the voltage, current, real and reactive power at the sending end and the percent voltage regulation of the line for nominal pi network. (Please determine the length of the transmission line within the specified limits: 150-220 km. By considering the length value you determined yourself, solve the question.)
Develop a small-scale equivalent transmission line pi model (per phase) of the transmission lines with the specification given in table 1. The conductors are placed with a flat horizontal spacing of 7.25 meters. Consider that the load connected against the line 125MW at 0.85 lagging power factor. You are required to develop an equivalent model for a maximum 220V (RMS) sending and receiving end voltage and a maximum of 5A load current. Sr. NTDC Transmission Line Length Conductor No. Туре 220 kV DG Khan-Loralai Transmission Line (227 km) 227km Pheasant TABLE AJ Electrical characteristics of bare aluminum conductors steel-relnforced (ACSR)+ Reniertance Reactance per conductor 1-ft apacing. 60 Ha Ae, 60 Ha Capaitive Aluminum ares, emil Layers of Outaide aluminum diameter, in a/1,000 ft soC, D/ml GMR Induetive Stranding AL/8t De, 20°C. 20C, a/mi Code word D. t Ma-mi Waswing Partridge Ostrieh Merlin Linnet Oriole Chickndee Ibin Pelienn Flicker Hawk 266,800 206,800 300,000 336, 400 336.400…
The VSWR on an 50-Ohm transmission line is 5. The distance between successive voltageminima is 80 cm while the distance from the load to the first minimum is 30 cm. What are thereflection coefficient and load impedance
2. A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0-85 p.f. lagging by means of a transmission line. The series impedance of a single conductor is (20 + j52) ohms and the total phases-neutral admit- tance is 315 microsiemens. Shunt leakage may be neglected. Using the nominalT approximation, calculate the line voltage at the sending end of the line. If the load is removed and the sending end voltage remains constant, find the percentage rise in voltage at the receiving end.
For the given power transfer, a star system is associated with larger line currents and a delta system is associated with a larger line voltage. Select one: O True O False Jump to...
2. A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0-85 p.f. lagging by means of a transmission line. The series impedance of a single conductor is (20 + j52) ohms and the total phases-neutral admit- tance is 315 microsiemens. Shunt leakage may be neglected. Using the nominal T approximation, calculate the line voltage at the sending end of the line. If the load is removed and the sending end voltage remains constant, find the percentage rise in voltage at the receiving end.
A 400 km long, 50 Hz transmission line having series resistance and inductance of 0.12/km and ImH/km, and shunt capacitance of 0.01µF/km connects a generator and a load. The load is consuming 100 MW at 220 kV and 0.8 power factor lagging. Find the voltage and current at the sending end, and the voltage regulation of the line. Assume distributed parameter model of the line.
2. A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0-85 p.f. lagging by means of a transmission line. The series impedance of a single conductor is (20 + j52) ohms and the total phases-neutral admit- tance is 315 microsiemens. Shunt leakage may be neglected. Using the nominal T approximation, calculate the line voltage at the sending end of the line. If the load is removed and the sending end voltage remains constant, find the percentage rise in voltage at the receiving end. [143 kV; 9%| 3. Calculate 4, B, C and D constants of a 3-phase, 50 Hz transmission line 160 km long having the follow- ing distributed parameters : R 0-15 2/km;L=1-20 x 10 H/km; C=8 x 10 F/km; G 0 (A = D = 0-988 0-3" ; B = 64-2 L 68-3° 2; C=0-4 x 10 90-2° SI
2. A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0-85 p.f. lagging by means of a transmission line. The series impedance of a single conductor is (20 +j52) ohms and the total phases-neutral admit- tance is 315 mnicrosiemens. Shunt leakage may be neglected. Using the nominal T approximation, calculate the line voltage at the sending end of the line. If the load is removed and the sending end voltage remains constant, find the percentage rise in voltage at the receiving end. [143 kV; 9%]
A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0.85 p.f. lagging by means of a transmission line. The series impedance of a single conductor is (20 + j52) ohms and the total phases- neutral admittance is 315 micro- siemens. Shunt leakage may be neglected. If the series impedance reduces by 20% and the admittance is increased by 10%. Find the voltage of the sending end by using nominal T approximation Your answer Using the nominal pi approximation, calculate power factor at the sending end of the line. Your answer
A 220 kV, 50 Hz, three-phase transmission line is 60 km long. The resistance per phase is 0.15 ohms/km and the inductance per phase is 1.3 mH per km and the shunt capacitance is negligible. Use the short line model to determine; i) the voltage and power at the sending end ii) voltage regulation and efficiency when the line is supplying a three-phase load of 350 MVA, 220 kV at a power factor of 0.85 lagging.