Question

In case of a transmission line, the corona ______

• A. Reduces the magnitude of high voltage steep fronted waves due to lightning or switching
• B. Increases the magnitude of high voltage steep fronted waves due to lightning or switching
• C. First reduces and then decreases the magnitude of high voltage steep fronted waves due to lightning or switching
• D. First reduces and then increases the magnitude of high voltage steep fronted waves due to lightning or switching

Hint:

Corona effect helps mitigate voltage surges by partially dissipating energy during high-voltage events.

Answer 1

The Correct Option is A

Corona discharge acts like a cushion against sudden high voltage transients caused by switching or lightning by partially ionizing the air and thereby reducing the steepness and magnitude of the wavefront.