关键词: 接地网, 腐蚀故障诊断, 软件

Abstract: Based on the hierarchical simplification of grounding grids in[11] and the multi-excitation iteration least square diagnosis approach in [9]，an application software based on MATLAB of corrosion diagnosis for grounding grids is put forward.The automatic generation of hierarchical simplification model，the software realization of testability evaluation，software realization of uncertain branch groups dividing and generation of their prototypes are detailed.The way to evaluate the possible value ranges of uncertain branches is also described.A grounding grid with sixty branches is used as an example to illustrate the proposed methods，the results of which show the feasibility of the proposed methods.

Key words: grounding grids, corrosion diagnosis, software