Study on Evaluation Method of Impulse Dispersion Performance of Grounding Device Using X-ray Imagining System

When the lightning current enters ground through grounding system, impulse dispersion performance can be observed by phenomenon of soil spark discharge, which is fundamentally determined nearby soil. At present, engineers use an empirical formula to convert discharge coefficient resistance. Therefore, there no available quantitative analysis method evaluate performance. To solve this problem, paper proposes evaluation for efficiency using X-ray images, define VI as parameter, ratio volume area peak current. Then, rationality and validity are verified. Finally, variation rules analyzed in different soils. Results show that reflect change more clearly under conditions, parameter provides a new idea enhancing near electrode.