Abstract
Generally, when studying the capacitive coupling between power lines and pipelines the soil is considered a perfect conductor and its real conductivity is ignored; in this paper we want to overcome this limitation and present a study about the influence of soil conductivity just in the context of the above mentioned phenomenon. In order to do that, we derive analytical formulas for calculating the electric scalar potential, both in the air and in the ground, generated by an overhead conductor, and we compare some results obtained by means of these formulas with the ones deriving from the well known method of images that is based on the assumption of perfectly conducting soil.
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