A method for analyzing a fault arc source position of a fully-enclosed ring main unit

Abstract

The application provides a method for analyzing a fault arc source position of a fully-enclosed ring main unit, comprising: evaluating actual conduction paths of each grounding connecting piece in a shell grounding loop according to a horizontal low-resistance path distribution of a metal shell, and identifying an actual path structure of a shunt current flowing to each grounding connecting piece along the horizontal low-resistance path of the shell; evaluating connectivity of a target grounding connecting piece node in a grounding loop topology structure, and determining spatial position coordinates of the target grounding connecting piece node according to the connectivity of the target grounding connecting piece node in the grounding loop topology structure; and obtaining a pre-constructed three-dimensional structure model of the fully-enclosed ring main unit according to the spatial position coordinates, and determining accurate positioning coordinates of the fault arc source by projecting the spatial position coordinates to an internal structure layer of the three-dimensional structure model.