Simulation Based Analysis of Switching and Lightning Transient Effects on Extra High Voltage AC Overhead Transmission Line

In power system, transient overvoltage is the momentary production of very high voltage due to lightning and switching of variegated power system equipment. On account of the unwanted interruption, imbalance in the transmission line is concocted. It is a phenomenon that can't be circumvented but can be diminished to a tolerable limit. Researchers in the field of power transmission system have been working on this to constrain more development. This paper is an exposition of work with a part of 400kV AC overhead transmission network in Bangladesh. Simulation of load flow, short circuit fault, switching transient due to capacitor banks and transformer energization and de-energization are done along with lightning impulse. The purpose of this work is to simulate the effect of the switching and lightning transient on the transmission system.