Abstract
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.
Highlights
The interaction between two earth return circuits, e.g., high voltage alternating current (HVAC) transmission line and a Conventional methods used to analyze the inductive interference between HVAC power lines and pipelines are usually based on a circuit model approach
Voltage peaks commonly occur where the pipeline converges or diverges with the HVAC power line, separation distance or soil resistivity changes significantly; where isolation joints are present on the pipeline; or where the electromagnetic field varies such as at phase transpositions [8]
This paper presents a comprehensive study of the effect of different parameters on the induced voltage and current along a transmission pipeline
Summary
The interaction between two earth return circuits, e.g., high voltage alternating current (HVAC) transmission line and a. High-quality insulating coatings, diameters and lengths of pipelines have significant impact on equivalent unit-length pipeline electrical parameters: longitudinal resistance R ( /m), longitudinal inductance L (H/m), shunt conductance G (S/m) and shunt capacitance C (F/m) The relationships between these parameters of main pipelines used in practice, buried in soil with typical conductivity, meet inequality R < ωL and G < ωC what significantly affects wave parameters—propagation coefficient and characteristic impedance of a transmission pipeline. The purpose of this work is to take this problem and present a method for the analysis of inductive interference of power lines on transmission pipelines taking into account the wave nature of this phenomenon Modeling of such impact shall be carried out using the simulation package SPICE. A comprehensive study of how various parameters influence the peak and distribution/shape of the induced potential will present
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