基于 COMSOL Multiphysics 的瞬变电磁法接地网故障诊断仿真研究.

To diagnose breakpoints and corrosion situation of grounding grids in the case of no power outages and digging，the paper proposes an idea based on transient electromagnetic method. It gets transient electromagnetic response of the grounding grids model driven by step waves，using COMSOL Multiphysics to simulate. It uses MATLAB programming to calculate the apparent resistivity of grounding grids model. And the profile of apparent resistivity is obtained by the mapping function of surfer. The paper takes the shape of Chinese character ri as an example， comparing the profiles of apparent resistivity measured in different conditions of the grounding grids, including in good condition，half the middle width and with left or middle breakpoints，the result verifies the correctness of the method applied in fault diagnosis of grounding grids. [ABSTRACT FROM AUTHOR]