380 kilovolts 50 hertz length of a transmission line 250 kilometers given as.Steel core aluminum conductors were used in a three-phase transmission line and the diameter of these conductors was determined 20 millimeters given as. The roughness coefficient of these conductors is 0.9 , If the phase gaps are 5 meters . Average air temperature and air pressure along the line, respectively 25 °C and 750 mmHg is. Under these given conditions, the line Assuming that it is operated at 494 kilovolts voltage; a) Calculate the corona loss per kilometer of a phase of the transmission line using the peek formula ? b) Calculate the total corona losses that will occur in this transmission line using the peek formula. (Result will be entered in MegaWatts) ?

380 kilovolts 50 hertz length of a transmission line 250 kilometers given as.Steel core aluminum conductors were used in a three-phase transmission line and the diameter of these conductors was determined 20 millimeters given as. The roughness coefficient of these conductors is 0.9 , If the phase gaps are 5 meters . Average air temperature and air pressure along the line, respectively 25 °C and 750 mmHg is. Under these given conditions, the line Assuming that it is operated at 494 kilovolts voltage; a) Calculate the corona loss per kilometer of a phase of the transmission line using the peek formula ? b) Calculate the total corona losses that will occur in this transmission line using the peek formula. (Result will be entered in MegaWatts) ?

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

Chapter5: Transmission Lines: Steady-state Operation

Section: Chapter Questions

Problem 5.31P: A 500-kV, 300-km, 6()-Hz, three-phase overhead transmission line, assumed to be lossless, has a...

See similar textbooks

Similar questions

A 132 kV, three-phase, 50Hz transmission line uses 18 mm diameter, equally spaced conductors. Determine the spacing between these conductors, if it is to be designed such that the corona inception voltage is 5% higher than the normal operating voltage of the line at 40oC. (You may assume the expression relating the electric field and the voltage of the line as a starting point, m=0.9)
Geometric mean radius of a 3-phase transmission line of 422 kV, 220 km length 22 mm dir. The roughness factor of the conductor is 0.82 and the geometric mean length between phases is 11 m. Air pressure along the line is 720 mm Hg and the temperature is 22 ° C. In this transmission line; a) - Calculate the corona voltage and the voltage at which ionization begins with impingement particles. b) - Find the total corona loss in the three phase system for the operating voltage with the Peek formula c) - Find the total corona loss for 1% increase in operating voltage.
In a three-phase transmission line with a length of 150 km, a voltage of 250 kV and a frequency of 50 Hz, the diameter of the steel-cored aluminum conductors is 18 mm, the roughness coefficient of the conductors is 0.6, and the spacing between the conductors is 6 m. Since the average air temperature is 27˚ C and the air pressure is 762 mmHg along the line, find the corona voltage around the conductor and the total loss of the line according to the Peek formula.
Estimate the corona loss for a 3-phase, 110 kV, 50 Hz, 150-km-long transmission line consisting of three conductors, each of 10 mm diameter and spaced 2.5 m apart in an equilateral triangle formation. The temperature of the air is 30oC and the atmospheric pressure is 750 mm of mercury. Take the irregularity factor as 0.85. Ionisation of the air may be assumed to take place at a max voltage gradient of 30 kV/cm.
It is desired to construct uniform transmission lines using polyethylene (εr = 2.25) as the dielectric medium. Assuming negligible losses, find the inner radius of the outer conductor (in mm) for a 76 Ω coaxial line, where the radius of the center conductor is 0.6 (mm).
Geometric mean radius of a 400 kV, 200 km three-phase transmission line 20 mm dir. The roughness factor of the conductor is 0.8 and the geometric mean length between phases is 11 m. Air pressure along the line is 700 mm Hg and the temperature is 20 ° C. In this transmission line; a) - Calculate the corona voltage and the voltage at which ionization begins with impingement particles. b) - Find the total corona loss in the three phase system for the operating voltage with the Peek formula. c) - Find the total corona loss for 10% increase in operating voltage.
A microstrip line is composed of zero thickness copper conductors on a substrate having εr = 8.4, tan = 0.0005 and thickness 1.5 mm. if the line width is 0.5 mm,and operated at 6Ghz, determine the characteristic impedance.
A 3 –phase 50 HZ transmission line have conductors of sections 90 mm2 and effective diameter of 1cm and are placed at the vertices of an equilateral triangle of side 1metre. The line is 20 km long and delivers a load of 10MW at 33kV and p.f 0.8. Neglect capacitance and assume temperature of 20 oC. Determine the efficiency and the regulation of the line
1. What is the necessary condition for matching transmission lines? In addition, what is a micro strip line? 2. For a distortion less line α = 0.02dB/m, Z0 (R0) = 60Ω and C = 0.2nF/m. Find the resistance and velocity of wave propagation. [Do not forget the units.] 3. For a finite lossless transmission line with open-circuit termination, sketch Xio vs l. Indicate where the sketch is inductive and capacitive.
A 15-km, 60Hz, single phase transmission line consists of two solid conductors, eachhaving a diameter of 0.8cm. If the distance between conductors is 1.25m, determine theinductance and reactance of the line
A transmission line has an inductance of 4 mH/loop km and a capacitance of 0.004µF/km. Determine, for a frequency of operation of 1 kHz, the phase delay, the wavelength on the line, and the velocity of propagation (in metres per second) of the
A Three-Phase, 180 KV, 75 Hz Transmission Line consists of 1.2 cm radius conductors spaced at 2.4 meters apart in an equilateral triangular formation. If the Temperature is 40 ºC and Atmospheric Pressure is 76 cm of Hg, calculate the Corona Loss per km of the line. Take m0=0.8