Grounding simulation test is the basic method to realize the grounding parameters prediction and characteristic analysis.In the experiments of several grounding materials such as flexible graphite composite material

sustained-release ion grounding module and grounding module

some similarity items can’t be strictly followed which lead a big prediction error value.In order to solve this problem

firstly

this article expounds the distortion similarity model of the grounding simulation test

analyzes the source of distortion similarity terms.Secondly

puts forward the concept of the distortion coefficient and the sensitivity of distortion similarity terms.At last

an experimental emulation is given to illustrate the sensitivity of distortion similarity terms which include the grounding conductor diameter distortion

grounding conductor electrical resistivity distortion and the multi-distortion similarity terms.The research contents of this paper can provide a reference for the grounding simulation test and other scaling tests in the high voltage fields.