Analysis on Installation and Effect of Transmission Line Surge Arresters
Xin Li · Insulators and Surge Arresters · 2004
The lightning strokes on transmission lines not only cause dangerous overvoltages but also disturb the power supply.To reduce the probability of occurrence of insulation flashover caused by lightning,a selective installation of transmission line surge arresters is recommended. With an example of a 110kV transmission line,some principles for installation of surge arresters are described.At first,whether shielding failures or backflashovers causing the line insultor flashover should be ascertained.Then,the main objective of installation of surge arresters is to afford protection for towers liable to lightning stroke and besides,the improvement of the lightning withstand level should be considered.