Wave propagation effects induced in transmission pipelines by EMI from power lines

Pipelines collocated in close proximity to high voltage alternating current transmission lines may be subjected to electrical interference from inductive effects. If these effects are high enough, they may pose a safety hazard to personnel or may compromise the integrity of the pipeline. The use of the circuit simulation package simulation program with integrated circuit emphasis (SPICE) permits the complex analysis of the electromagnetic interference on transmission pipelines. In the approach presented, the wave phenomena (voltages and currents) along the pipelines have been taken into account. A comprehensive study of how various parameters influence the peak and distribution/shape of the induced potential is present. The pipeline is modeled as a large multinode electrical equivalent circuit. The circuit is a chain of basic circuits, which are equivalents of homogenous sections of the pipeline with uniform exposure to the primary interfering electric field associated with the inductive influence. The usefulness of the SPICE simulation has been illustrated by examples.