Research on Lightning-shielding Design of a Transmission Line

Development of the national economy, the demand for electricity has grown exponentially, while the power supply reliability play a key role in economic development, so the reliable operation of the grid also put forward higher requirements. Lightning trip is the biggest threat to the power grid, accounting for 70 to 90 percent of the power grid failure. Which is more likely to be struck by lightning overhead transmission lines, thus enhancing the lightning overhead lines and lightning short-circuit fault containment sphere of influence, a transmission line in a very important part of the design. Two ways for lightning overhead lines is proposed to reduce ground resistance overhead transmission lines and improve the level of the line itself mine-resistant design. Keywords-transmission line; lightning-shielding; design;