Volume 06,Issue 04

Investigation of Overvoltages Caused by Lightning Strikes on Transmission Lines and GIS Substation Equipment

Authors

Ebadollah Amouzad Mahdiraji

Abstract
Overvoltages caused by lightning strikes on the power system can damage the power system and reduce the reliability of the system, and this is always one of the main challenges in designing power transmission lines. Due to their relatively high height, they are one of the most vulnerable parts of the transmission line against lightning strikes. In this paper, we have tried to model the transient state of power and lightning network equipment using EMTP-RV software. Different lightning strikes on the tower and the phase conductor for a 400 kV double-circuit transmission line to be clay. To achieve this goal, an attempt was made to use the precision modeling mode of each network equipment, also since in recent years, the use of GIS substation has been considered due to the smaller space required for the construction of this type of substation and one of the main causes of equipment failure is this type of substation. Fast transient Overvoltages. Because the transmission line leads to a 400 kV GIS substation, an attempt has been made to model the substation equipment for this type of overvoltage on substation equipment and insulation coordination. It should also be examined.

Keyword: Lightning, Overvoltage, Transmission Line Tower, GIS substation, Grounding System, Insulation Coordination.

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