Automatically Generated Method of Test Schemes for Grounding Grids Corrosion Diagnosis

To benefit the corrosion diagnosis of grounding grids,an automatically generated method of test schemes were investigated.In case of given excitation positions,a redundant complete test scheme was formed.Accordingly,the voltage measurement positions without necessity were eliminated to reduce the amount of test work.In case of unknown excitation positions,the current excitations were set between the nodes with larger degrees with priority.The desired scheme was formed in a similar way as the given excitation position cases.An experimental grounding grid with sixty branches was used as an example.The results of analysis show that the proposed method is feasible and can automatically generate the complete test scheme with reduced amount of test work.