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In this paper, the AC interference produced by an overhead power transmission line on a buried metallic pipeline is estimated using a circuital method based on the well-known Carson’s formulae and a two-dimensional finite element numerical code. The finite element formulation used in this paper implicitly takes into account the mutual inductive coupling between all the considered conductors, and it allows a more detailed analysis in cases where a nonhomogeneous soil is present. The FEM approach includes a procedure which has been developed to enforce that the sum of the currents flowing through the soil, pipeline and eventual overhead ground wire is equal to zero. A case study has been identified, and the results obtained by the two approaches have been compared and discussed.

progress in electromagnetics research c. pier c

A COMPARISON BETWEEN CARSON'S FORMULAE AND A 2D FEM APPROACH FOR THE EVALUATION OF AC INTERFERENCE CAUSED BY OVERHEAD POWER LINES ON BURIED METALLIC PIPELINES