Computer simulation of responses of earth‐return circuits to the AC and DC external excitation

Czarnywojtek, Piotr; Machczyński, Wojciech

doi:10.1002/etep.4450130306

Cited by 10 publications

(14 citation statements)

References 4 publications

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“…Current and potential along the pipeline located in an electric flow field (E(x) = -dV e /dx) due to stray currents can be calculated using a pipeline modeled as a circuit with lumped parameters [4,[7][8][9]15].…”

Section: Current and Potential Along A Pipeline Buried In The DC Stmentioning

confidence: 99%

“…), it is possible to model the segment by a π -two port, as shown in Fig. 5 [4,9] with the series impedance and the shunt admittance:…”

Section: Current and Potential Along A Pipeline Buried In The DC Stmentioning

confidence: 99%

“…the Boundary Element Method [1,2,13] is an alternative to the approximate method in which the equivalent rail with current energization is modeled as a large multinode electrical equivalent circuit with lumped parameters. This circuit is a chain of basic circuits, which are equivalents of homogenous sections of the rail [3,4,7,9,14,15]. It should be pointed out, that the simulations presented by deterministic approach refer to the chosen point of time, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of pipeline random response to stray currents effects produced by D.C. traction system

2018

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Simulation of pipeline random response to stray currents effects produced by d.c. traction system Symulacja losowej odpowiedzi rurociągu na prądy błądzące generowane przez trakcję elektryczną prądu stałego AbstractThe paper presents a method of the simulation of the pipeline potential shift produced by D.C. traction stray currents which are stochastic in character. The calculation model presented is based on the deterministic model used in the earth-return circuit theory combined with the non-deterministic approach based on the Monte Carlo procedure. The model of the equivalent rail with current energization and the concept of superposition allow one to consider more complicated D.C. railway systems using a segmental approximation of the complex railway route and taking into account a number of substations and loads at any location. A locomotive position and a load current are assumed to be independent random variables in the non-deterministic approach. Using simulation program developed random characteristics of a pipeline response e.g. maximum, minimum, median and mean values can be obtained. Hence the pipeline regions more exposed to corrosion risk can be determined.

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Section: Current and Potential Along A Pipeline Buried In The DC Stmentioning

confidence: 99%

“…), it is possible to model the segment by a π -two port, as shown in Fig. 5 [4,9] with the series impedance and the shunt admittance:…”

Section: Current and Potential Along A Pipeline Buried In The DC Stmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of pipeline random response to stray currents effects produced by D.C. traction system

2018

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“…), it is possible [16] to model the circuit by a π -two port, as shown in Fig. 2a, with the series impedance…”

Section: Spice Basic Circuitsmentioning

confidence: 99%

“…The driving voltage source E dx represents the external excitation, producing a current I (x) and a potential V (x) along the circuit. Formulas for calculation of electrical parameters of a pipeline buried in the earth can be found, e.g., in [8,9,16].…”

Section: Equivalent Circuit Of a Conductor With Earth Returnmentioning

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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Analysis of transient inductive interference in underground pipelines due to faults on nearby power lines

Tang

Cui

et al. 2007

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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PurposeThe purpose of this paper is to present a method to calculate the transient induced voltages along the underground pipelines and analyze the transient interference generated in the pipelines due to the inductive coupling in the fault‐to‐ground condition of power lines in close proximity.Design/methodology/approachBased on finite difference‐time domain method, an improved method is proposed to calculate transient inductive interference in underground metallic pipelines due to a fault in nearby power lines. The frequency‐dependent problem in the analysis of transient interference is solved in phase domain. Compared with the traditional method, the disposal of phase‐modal transformation matrices’ frequency‐dependent characteristic is avoided and the calculation is simplified by using vector fitting approach and recursive algorithm greatly in the proposed method.FindingsA novel improved method is proposed to calculate transient induced voltage distribution along underground metallic pipelines due to a fault in nearby power lines. Results show that the peak value of transient induced voltage at the most critical point is about 1.15 times of the magnitude in the steady state without the fault removed and the analysis of transient inductive interference is necessary in the fault‐to‐ground case of power lines.Practical implicationsIn order to mitigate the interference from power lines to nearby pipelines, pipelines should be good grounded and positioned as far away from the power line as possible. In high soil resistivity areas, the common corridor should be avoided.Originality/valueThe paper presents a method to calculate the transient induced voltages along the underground pipelines and analyze the transient interference generated in the pipelines due to the inductive coupling in the fault‐to‐ground condition of nearby power lines. The proposed method is general and can also be applied to other transient interference studies such as crosstalk problems of communication networks and interference between power lines and aboveground pipelines or communication cables. Effects of various parameters upon the inductive interference generated in underground pipelines due to a fault in nearby power lines are analyzed to be a guide for controlling the inductive interference.

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Computer simulation of responses of earth‐return circuits to the AC and DC external excitation

Abstract: The use of

Cited by 10 publications

References 4 publications

Simulation of pipeline random response to stray currents effects produced by D.C. traction system

Simulation of pipeline random response to stray currents effects produced by D.C. traction system

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

Analysis of transient inductive interference in underground pipelines due to faults on nearby power lines

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