Application of Coupling Ground Wire in Distribution Line Lightning Protection

Lightning induced overvoltage is the main object of lighting protection for overhead distribution lines, and the protective effect of coupling ground wire against lightning induced overvoltage is a common focus inactual projects. Firstly, a lightning induced overvoltage calculation model of distribution line with ground wire is established. Then, by numerical simulation, we analyzed the inhibitory effect of coupling ground wire to lighting induced overvoltage, including the influences of tower type and ground wire position.