Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN: 9781305632134
Author: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher: Cengage Learning
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Chapter 5, Problem 5.11P
A 40-km, 220-kV, 60-Hz, three-phase overhead transmission line has a per-phase resistance of
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A 45-km, 220-kV, 60-Hz three-phase overhead
transmission line has a per-phase resistance of
0.2 ohm/km, a per-phase inductance of 1.4263
mH/km, and negligible shunt capacitance. Using
the short line model, find the sending-end voltage,
voltage regulation, sending-end power, and
transmission line efficiency when the line is
supplying a three-phase load of: (a) 371 MVA at
0.8 power factor lagging and at 220 kV, (b) 371
MVA at 0.8 power factor leading and at 220 kV
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.
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.)
Chapter 5 Solutions
Power System Analysis and Design (MindTap Course List)
Ch. 5 - Representing a transmission line by the two-port...Ch. 5 - The maximum power flow for a lossy line is...Ch. 5 - Prob. 5.21MCQCh. 5 - A 30-km, 34.5-kV, 60-Hz, three-phase line has a...Ch. 5 - A 200-km, 230-kV, 60-Hz, three-phase line has a...Ch. 5 - The 100-km, 230-kV, 60-Hz, three-phase line in...Ch. 5 - The 500-kV, 60-Hz, three-phase line in Problems...Ch. 5 - A 40-km, 220-kV, 60-Hz, three-phase overhead...Ch. 5 - A 500-km, 500-kV, 60-Hz, uncompensated three-phase...Ch. 5 - The 500-kV, 60-Hz, three-phase line in Problems...
Ch. 5 - A 350-km, 500-kV, 60-Hz, three-phase uncompensated...Ch. 5 - Rated line voltage is applied to the sending end...Ch. 5 - A 500-kV, 300-km, 6()-Hz, three-phase overhead...Ch. 5 - The following parameters are based on a...Ch. 5 - Consider a long radial line terminated in its...Ch. 5 - For a lossless open-circuited line, express the...Ch. 5 - A three-phase power of 460 MW is transmitted to a...Ch. 5 - Prob. 5.55PCh. 5 - Consider the transmission line of Problem 5.18....Ch. 5 - Given the uncompensated line of Problem 5.18, let...
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- In terms of line-to-line capacitance, the line-to-neutral capacitance of a single-phase transmission line is Same Twice One-halfarrow_forwardA single-phase overhead transmission line consists of two solid aluminum conductors having a radius of 3 cm with a spacing 3.5 m between centers. (a) Determine the total line inductance in mH/m. (b) Given the operating frequency to be 60 Hz, find the total inductive reactance of the line in /km and in/mi. (c) If the spacing is doubled to 7 m, how does the reactance change?arrow_forwardFor a single-phase two-conductor line with composite conductors x and y, express the inductance of conductor x in terms of GMD and its GMR.arrow_forward
- Three ACSR Drake conductors are used for a three-phase overhead transmission line operating at 60 Hz. The conductor configuration is in the form of an isosceles triangle with sides of 20, 20, and 38 ft. (a) Find the capacitance-to-neutral and capacitive reactance-to-neutral for each 1-mile length of line. (b) For a line length of 175 mi and a normal operating voltage of 220 kV, determine the capacitive reactance-to-neutral for the entire line length as well as the charging current per mile and total three-phase reactive power supplied by the line capacitance.arrow_forwardCalculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-phase line in Problem 4.18. Also calculate the line-charging current in kA/phase if the line is 110 km in length and is operated at 230 kV. Neglect the effect of the earth plane.arrow_forwardConsidering two parallel three-phase circuits that are close together, when calculating the equivalent series-impedance and shunt-admittance matrices, mutual inductive and capacitive couplings between the two circuits can be neglected. True Falsearrow_forward
- A three-phase overhead transmission line is designed to deliver 190.5 M VA at 220 kV over a distance of 63 km, such that the total transmission line loss is not to exceed 2.5 of the rated line MVA. Given the resistivity of the conductor material to be 2.84108-m, determine the required conductor diameter and the conductor size in circular mils. Neglect power losses due to insulator leakage currents and corona.arrow_forwardIn the medium-length power transmission line model given below, since the end-of-line voltage value of the nominal-T equivalent circuit is 154 kv, find the voltage regulation value for this line and draw the phasor diagram.arrow_forwardA 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.arrow_forward
- Consider the 500 kV, three phase bundled conductor line as shown in the figure below. Find the line to neutral capacitance. 0.5 m 30 mm (0) (O to Ine 15 m 15 marrow_forward2. A three-phase 60-hz transmission line has its conductors arranged in a triangular formation so that two of the distances between conductors are 20 ft and the third is 40 ft. The conductors are ACSR Rook. Determine the capacitance to neutral in microfarads per mile and the capacitive reactance to neutral in ohm-miles. If the line is 115 mi long, find the capacitance to neutral and capacitive reactance of the line.arrow_forwardSolve this math : A three-phase 60-hz transmission line has its conductors arranged in a triangular formation so that two of the distances between conductors are 20ft and the third is 40 ft. The conductors are ACSR Rook. Determine the capacitance to neutral in microfarads per mile and the capacitive reactance to neutral in ohm-miles. If the line is 115 mi long, find the capacitance to neutral and capacitive reactance of the line. Note: In the below i have added similer type of math and its ans.In the above math, there is just changes of values and Main Change is ACSR ROOK which is given to then question and in the below question which is solved it was ask ACSR Parakeet. So notice that. Follow This Book for help"POWER SYSTEM ANALYSISAND DESIGN;FIFTH EDITION, SI;J. DUNCAN GLOVER" Now solve the math according to the given way solve the math. "A three-phase 60-hz transmission line has its conductors arranged in a triangular formation so that two of the distances between conductors are 25…arrow_forward
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