July 2008
Intermediate to advanced
625 pages
17h 13m
English
Content preview from Electric Power Transmission and Distribution
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6
Corona
CHAPTER OBJECTIVES
After reading this chapter, you should be able to:
Define the physical phenomenon of corona
Understand the effect of corona on transmission lines
Discuss the effect of corona on radio interference, audible noise and power loss
Discuss the methods for reducing corona
Discuss the interference with communication lines
6.1 INTRODUCTION
Corona is a phenomenon whereby, the air around the conductors is ionized. Consider a single-phase two-wire system, whose spacing is large as compared to the diameter of the wires. When a low alternating voltage is applied across two conductors, there is no change in the condition of the air around. If the applied voltage is gradually increased, it will result in a gradual increase ...
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