Prediction Method for Buried Pipeline Voltages Due to 60 Hz AC Inductive Coupling Part I-Analysis

Taflove, Allen; Dabkowski, John

doi:10.1109/tpas.1979.319290

Cited by 63 publications

(19 citation statements)

References 2 publications

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“…The effect of electric fields induced in real pipelines or pipeline networks, including the discontinuities mentioned, can be modelled by distributed-source transmission line (DSTL) theory. This has been used extensively for AC induction in pipelines (Taflove and Dabkowski, 1979) and applied to geomagnetic induction in pipelines by Boteler and Seager (1998). In the DSTL approach, each uniform section of the pipeline is represented by a transmission line circuit element with specific series impedance and a parallel admittance.…”

Section: Modelling Pipe-to-soil Potentialsmentioning

confidence: 99%

Modelling of geomagnetic induction in pipelines

Trichtchenko

Boteler

2002

Ann. Geophys.

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Abstract. Geomagnetic field variations induce telluric currents in pipelines, which modify the electrochemical conditions at the pipe/soil interface, possibly contributing to corrosion of the pipeline steel. Modelling of geomagnetic induction in pipelines can be accomplished by combining several techniques. Starting with geomagnetic field data, the geoelectric fields in the absence of the pipeline were calculated using the surface impedance derived from a layeredEarth conductivity model. The influence of the pipeline on the electric fields was then examined using an infinitely long cylinder (ILC) model. Pipe-to-soil potentials produced by the electric field induced in the pipeline were calculated using a distributed source transmission line (DSTL) model. The geomagnetic induction process is frequency dependent; therefore, the calculations are best performed in the frequency domain, using a Fourier transform to go from the original time domain magnetic data, and an inverse Fourier transform at the end of the process, to obtain the pipe-tosoil potential variation in the time domain. Examples of the model calculations are presented and compared to observations made on a long pipeline in the auroral zone.

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Section: Modelling Pipe-to-soil Potentialsmentioning

confidence: 99%

Modelling of geomagnetic induction in pipelines

Trichtchenko

Boteler

2002

Ann. Geophys.

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“…9 This method has been applied to telluric current studies by Boteler and Cookson. 10 Each short section of pipeline is represented by a series impedance (Z) and a parallel admittance (Y), and the induced electric field (E) is represented by a voltage source as shown in Figure 1.…”

Section: Theorymentioning

confidence: 99%

“…The exponential fall-off of the potential at the ends of the pipeline was characterized by an adjustment distance 1/␥, which had the value 60 km (37 miles). Using these values in Equations (8) and (9) and assuming there were no grounds at the ends of the pipeline allowed the potential profile to be calculated for any specified electric field (E). Figure 4 shows the potential profile for an electric field of 1 V/km parallel to the pipeline.…”

Section: Comparison Between Theory and Observationmentioning

confidence: 99%

Telluric Currents: A Meeting of Theory and Observation

Boteler

Seager

1998

CORROSION

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Pipe-to-soil (P/S) potential variations resulting from telluric currents have been observed on pipelines in many locations.However, it has never been clear which parts of a pipeline will experience the worst effects. Two studies were conducted to answer this question. Distributed-source transmission line (DSTL) theory was applied to the problem of modeling geomagnetic induction in pipelines. This theory predicted that the largest P/S potential variations would occur at the ends of the pipeline. The theory also predicted that large P/S potential variations, of opposite sign, should occur on either side of an insulating flange. Independently, an observation program was conducted to determine the change in telluric current P/S potential variations and to design counteractive measures along a pipeline in northern Canada. Observations showed that the amplitude of P/S potential fluctuations had maxima at the northern and southern ends of the pipeline. A further set of recordings around an insulating flange showed large P/S potential variations, of opposite sign, on either side of the flange. Agreement between the observations and theoretical predictions was remarkable. While the observations confirmed the theory, the theory explains how P/S potential variations are produced by telluric currents and provides the basis for design of cathodic protection systems for pipelines that can counteract any adverse telluric effects.

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“…These numerical models are capable of analyzing the interacting contribution of multiple variables to the overall magnitude of AC interference. Typical standard software packages for calculation of the EMI and corresponding effects on buried pipelines were reviewed in the literature [10][11][12][13][14][15][16][17][18][19][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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

Czarnywojtek

Machczyński

2017

Electr Eng

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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.

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Prediction Method for Buried Pipeline Voltages Due to 60 Hz AC Inductive Coupling Part I-Analysis

Cited by 63 publications

References 2 publications

Modelling of geomagnetic induction in pipelines

Modelling of geomagnetic induction in pipelines

Telluric Currents: A Meeting of Theory and Observation

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

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