Abstract：Piercing arrester is the most used type of lightning arrester for 10kV overhead lines. Its installation location and installation density directly affect the lightning protection effect of the line. Therefore, this paper studies the optimal installation and configuration of the piercing arrester through experiments and simulation. Combined with P—15 pin type and PS—20 post type two typical 10kV line insulators, lightning impulse discharge experiment is carried out to study the effect of installation position on discharge path. Based on ATP-EMTP software, the calculation model of induced lightning overvoltage is established, and the variation of lightning withstand level under different installation densities of lightning arresters is analyzed. The results show that the distance between the central axis of the piercing electrode and the central axis of the insulator should not be less than 300 mm, and the air gap in series outside the arrester should be adjusted to 120 mm. It is suggested that the insulator should be replaced with PS—20 post insulator while installing arrester, and the installation density should be separate one base pole. The actual line operation verifies the simulation conclusion. According to the above principles, the actual lightning trip rate of the reconstructed line decreases by about 75%.
2022, Vol. 23 
