Using CDEGS software package of grounding system

combined with engineering examples

four common resistance reduction measures of substation with high soil resistivity

including local soil replacement

deep well grounding

external grounding and grounding module and ion grounding rod

are simulated and calculated. Based on the calculation results

the resistance reduction characteristics of each resistance reduction measure are analyzed

and the engineering application suggestions are put forward. In addition

on the premise of ensuring personal and equipment safety

the paper discusses how to reasonably select the target of resistance reduction to avoid over design.