1. Estimate the corona loss for a three-phase, 110 kV, 50 Hz, 150 km long transmission line consisting ofthree conductors each of 10 mm diameter and spaced 2:5 m apart in an equilateral triangle formation.The temperature of air is 30°C and the atmospheric pressure is 750 mm of mercury. Take irregularityfactor as 0-85. Ionisation of air may be assumed to take place at a maximum voltage gradient of 30 kV/[316-8 kW]cm.2. Taking the dielectric strength of air to be 30 kV/cm, calculate the disruptive critical voltage for a 3-phaseline with conductors of 1 cm radius and spaced symmetrically 4 m apart.[220 kV line voltage]3. A 3-phase, 220 kV, 50 Hz transmission line consists of 1-2 cm radius conductors spaced 2 m at thecorners of an equilateral triangle. Calculate the corona loss per km of the line. The condition of the wireis smoothly weathered and the weather is fair with temperature of 20°C and barometric pressure of 72-2cm of Hg.[2-148 kW]

1. Estimate the corona loss for a three-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 air is 30°C and the atmospheric pressure is 750 mm of mercury. Take irregularity factor as 0-85. Ionisation of air may be assumed to take place at a maximum voltage gradient of 30 kV/ [316-8 kW] cm.

1. Estimate the corona loss for a three-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 air is 30°C and the atmospheric pressure is 750 mm of mercury. Take irregularity factor as 0-85. Ionisation of air may be assumed to take place at a maximum voltage gradient of 30 kV/ [316-8 kW] cm.

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

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.37MCQ

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