Simulation research on impulse characteristics of horizontal grounding conductor

Impulse grounding resistance is closely related to lightning withstand level of transmission line towers, so study on the impulse characteristics of tower grounding conductors is of great significance. This paper, based on circuit theory, uses electromagnetic transient analysis software ATPDraw to simulate impulse characteristics. Control function of ATPDraw can simulate inductance effect and spark discharge effect well when lightning current flows through the grounding conductor, improving the existing simulation model. In this paper, a single extended model is established and the characteristics that inductance effect varies with the length and spark discharge with the current amplitude are researched. Simulation results are compared with laboratory test conclusion and they are identical which testify that the model and method is reliable.