A Study of the Effect of Grounding Network Node Topology on its Lightning Impact Characteristics

Due to the inductive effect of the grounding grid and the high-frequency characteristics of the lightning current, when the electrical equipment is struck by lightning, the potential of the grounding grid rises rapidly, which is easy to cause insulation damage to the electrical equipment. In this paper, a simulation model is established, and different topologies are used as the basic research objects, and the time-domain impact characteristics of different grounding conductors under different influencing factors are first analyzed. Secondly, the influence of the absence of some conductors and the location and number of conductor corrosion fractures on the impulse response voltage at different injection points is analyzed, and the judgment method of the shape of the underground conductor after the extreme fracture of the underground conductor structure is obtained, and the authenticity and reliability of the simulation are finally verified by experiments.