Analysis of Electromagnetic Interferences Between AC High Voltage Power Lines and Metallic Pipeline Using Two Different Approaches Based on Circuit Theory and Electromagnetic Field Theory

Abstract

An important number of major utilities infrastructure projects are adopted worldwide as a consequence of human migration, pollution, geo-political alliances which force the governments around the world to massively invest in new transport and distribution networks serving for water, electricity, gas and oil supply. Installing pipelines in energy utility corridors containing high-voltage AC transmission lines subjects the pipelines to induced AC voltages, which is a real and serious problem requiring increased attention. Through proper modelling techniques, the induced currents and voltages in the underground/aboveground metallic pipelines can be accurately computed. In the following paper two different modelling concepts, based on circuit theory and electromagnetic theory approach are developed and discussed. A common right-of-way corridor between an overhead transmission line and a metallic pipeline is considered during the proposed assessment methodology. In order to evaluate how different variations of the model affects the magnitude of the induced quantities in the metallic pipeline a parametric analysis is employed. Based on the computed results, several dependencies between the power line current loads along with the considered length of parallel routing and the induced voltage are highlighted.