When the lightning strokes the feed-in section of 750 kV transmission line

there will be strong corona that contributes to the attenuation and distortion of lightning current. It is concerned what corona will do on the transient overvoltage between contacts of switch. On the basis of the Q-V characteristics of transmission lines

in this paper

a simple circuit model is set up and the transient overvoltage between contacts is studied when the switch is under the protection of MOA of 600 kV rated voltage. The result of computation indicates that the switch in 750 kV transmission line can work normally under the protection of the MOA and the corona causes the great attenuation and distortion of lightning current and does little effect on overvoltage between the contacts.