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Power Systems
Transmission and Distribution
Corona

Questions mapped to Corona under Transmission and Distribution.

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Q#1 Transmission and Distribution GATE EE 2002 (Set 1) MCQ +1 mark -0.33 marks

A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at

The upper surface of the conductor

The lower surface of the conductor

The ground surface

Midway between the conductor and ground

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Q#2 Transmission and Distribution GATE EE 2000 (Set 1) MCQ +2 marks -0.66 marks

The corona loss on a particular system at 50 Hz is 1kW/km per phase. The corona loss at 60 Hz would be

1kW/km per phase

0.83 kW/km per phase

1.2 kW/km per phase

1.13 kW/km per phase

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Q#3 Transmission and Distribution GATE EE 1999 (Set 1) MCQ +1 mark -0.33 marks

Corona losses are minimized when

Conductor size is reduced

Smooth conductor is reduced

Sharp points are provided in the line hardware

Current density in conductors is reduced

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Q#4 Transmission and Distribution GATE EE 1997 (Set 1) MCQ +1 mark -0.33 marks

Bundled conductors are employed to improve the

Appearance of the transmission line

Mechanical stability of the line

Decreases system stability

Increases the short circuit current

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