Influence of Steel Non-Linearity in Assessing 50-60 Hz Interference on Pipelines

Lucca, Giovanni

doi:10.2528/pierm18071811

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…After the solution of linear system (6), from the knowledge of the vectors [v] k , the currents [i] k can be obtained by means of relationship:…”

Section: Core Of the Algorithmmentioning

confidence: 99%

Multi-conductor transmission line with nonlinear impedances: Application to 50Hz studies

Lucca

2022

Serb J Electr Eng

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This paper presents an algorithm for the evaluation of currents and voltages along a multi-conductor transmission line having non-linear impedances due to the presence of ferromagnetic conductors; we assume that these impedances are function of the current carried by the relevant conductor so that the equivalent circuit modelling the line is non-linear and has to be solved by means of an iterative procedure. The present paper can be considered as a generalization of our previous works successfully applied to single-conductor lines with earth return. Some examples of application to typical 50-60 Hz interference studies between power/railway lines on telecommunication cables and pipelines are shown.

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“…After the solution of linear system (6), from the knowledge of the vectors [v] k , the currents [i] k can be obtained by means of relationship:…”

Section: Core Of the Algorithmmentioning

confidence: 99%

Multi-conductor transmission line with nonlinear impedances: Application to 50Hz studies

Lucca

2022

Serb J Electr Eng

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“…Much of the initial efforts in this field originated from circuital or transmission line approaches based on Carson's formulae for mutual impedance [13][14][15][16]. These methods are also generally based on performing a discretization of the considered corridor into sets of coupled smaller sections, described by lumped parameters [17]; such circuital approaches are computationally efficient, making them suitable for fast evaluations or parametric studies. In addition, the formulas for the approximate evaluation of mutual impedance have been extended over time to include the physical effects of soils constituted by multiple layers with different electrical resistivity values [18].…”

Section: Introduction Concerns Over Metallic Pipelines Integritymentioning

confidence: 99%

FLARE: A Framework for the Finite Element Simulation of Electromagnetic Interference on Buried Metallic Pipelines

Popoli,

Pierotti,

Ragazzi

et al. 2023

Applied Sciences

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The functionality of buried metallic pipelines can be compromised by the electrical lines that share the same right-of-way. Given the considerable size of shared corridors, computer simulation is an important tool for performing risk assessment and mitigation design. In this work, we introduce an open-source computational framework for the analysis of electromagnetic interference on large earth-return structures. The developed framework is based on FLARE—an efficient finite element solver developed by the authors in MATLAB®. FLARE includes solvers for problems involving static electric and magnetic fields, and DC and time-harmonic AC currents. Quasi-magnetostatic transient problems can be studied through time-marching or—for linear problems—with an efficient inverse-Laplace approach. In this work, we succinctly describe the optimization of time-critical operations in FLARE, as well as the implementation of a transient solver with automatic time-stepping. We validate the numerical results obtained with FLARE via a comparison with the commercial software COMSOL Multiphysics®. We then use the validated time-marching analysis results to test the accuracy and efficiency of three numerical inverse-Laplace algorithms. The test problem considered is the assessment of the inductive coupling between a 500 kV transmission line and a metallic pipeline buried in the soil.

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Influence of Steel Non-Linearity in Assessing 50-60 Hz Interference on Pipelines

Cited by 2 publications

References 13 publications

Multi-conductor transmission line with nonlinear impedances: Application to 50Hz studies

Multi-conductor transmission line with nonlinear impedances: Application to 50Hz studies

FLARE: A Framework for the Finite Element Simulation of Electromagnetic Interference on Buried Metallic Pipelines

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