Impact of Underbuilt Wire Position on Transmission Line Performance

This paper assesses the impact of underbuilt shield wire positioning on the lightning performance of transmission lines. The significance of this investigation stems from its potential to mitigate overvoltages along insulator strings and reduce lightning outages in transmission lines. The study evaluates underbuilt shield wire positioning in both linear distribution (solely along the Y-axis) and spatial distribution (across the X and Y axes) while maintaining the coordination and insulation limits of the transmission lines. Due to the complexity arising from the stochastic nature of outcomes, we employed statistical analyses to interpret the results of simulations. Given that, this paper contributes to the implementation of underbuilt shield wire in transmission lines, as underbuilt wire can potentially lower overvoltages in the insulator string.