Abstract
In order to evaluate the lightning protection and electromagnetic compatibility, understanding of transient behavior of grounding system plays an important role. This paper investigates the impacts of various step front current waves on the ground potential rise. In addition, the role of soil uniformity in ground potential rise has been discussed deeply in this paper. The finite integration technique (FIT) has been introduced as an applicable method in the transient study of grounding systems. The accuracy of the method has been verified against the experimental results and two other popular, i.e. method of moment (MOM) and partial element equivalent circuit (PEEC). The results indicate the acceptable accuracy of the FIT-based method. It is indicated that the faster surges may lead to higher potential rise in the grounding systems in power network.
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