AC interference on pipelines due to double circuit power lines: A detailed study

Micu, Dan D.; Christoforidis, Georgios C.; Czumbil, Levente

doi:10.1016/j.epsr.2013.04.008

Cited by 69 publications

(44 citation statements)

References 20 publications

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“…With these variations in the resultant field due to variations in the current phase shift (which could be time-dependent), there are also variations in the horizontal component of the magnetic field with current phase shift. Consequently, this brings about variation in the induced voltage on buried metallic pipelines in the vicinity of the lines [19]. It should be noted that the patterns shown in Figure 3 are for balanced circuits with the same magnitude of current flowing in the two circuits.…”

Section: Lateral Profiles Of the Resultant Field With Current Phase Smentioning

confidence: 99%

“…To the knowledge of the authors, the effect on magnetic field and its polarization have not been fully covered in detail. Research works in [18,19] showed that neglecting current phase shift effects in double-circuits led to significant errors in magnetic field calculations (larger than 45%) for human exposure [18] and between 10% and 75% for induced voltage on nearby buried metallic pipeline [19].…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this paper is to complete the previous mentioned works, by further establishing the effect of phase shift and phase arrangements using different power line configurations and giving a detailed analysis of the variation on the magnetic field distribution due to the effect of the current phase shifts. More so, the characteristics nature of the variations which was not considered in the previous research works [18,19] is covered in this paper. In addition, the magnetic field polarization study and the pattern of its variations with current phase shifts and phase arrangements are also presented.…”

Section: Introductionmentioning

confidence: 99%

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Variation in Phase Shift of Phase Arrangements on Magnetic Field Underneath Overhead Double-Circuit Hvtls: Field Distribution and Polarization Study

Ponnle¹,

Adedeji²,

Abe³

et al. 2017

PIER M

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Abstract-The currents flowing through a transmission line produce a rotating magnetic field of vertical and horizontal components which are orthogonal in space and vary with time. Buried and aerial metallic pipelines that run parallel to or are placed in the vicinity of overhead AC high voltage transmission lines are affected by this field resulting in an induced voltage on the pipelines. Several related studies and safety standards dealing with this problem have been published. Nevertheless on a multi-circuit line, the issue of current phase shift variation has not been fully covered yet. This paper provides a detailed analysis of the effect of current phase shifts on the magnetic field distribution and polarization pattern around power lines using analytical approach from electromagnetic field theory. In this study, not only the variation of the filed distribution with phase arrangements and phase shifts is further established, but also the characteristic nature of the variation of the field distributions for six phase arrangements is examined in more detail. The results show that the magnetic field distribution at the ground level and the spatial distribution of the magnetic field polarization ratio vary significantly with the phase sequence arrangement as well as the current phase shifts between the two circuits. The field polarization differs at different locations. The information from the results can be useful for consideration in designing an effective AC mitigation technique and in placing pipelines in the utility corridor with power lines. Pipelines should be placed in a region of minimum field intensity within the right-of-way of the line, in order to have minimal induction on the pipeline in normal operating conditions of the line.

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Section: Lateral Profiles Of the Resultant Field With Current Phase Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Variation in Phase Shift of Phase Arrangements on Magnetic Field Underneath Overhead Double-Circuit Hvtls: Field Distribution and Polarization Study

Ponnle¹,

Adedeji²,

Abe³

et al. 2017

PIER M

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“…(a) Effect of unbalanced current According to some works [23,24], the common unbalanced current levels are less than 2-3% for HVAC power lines. Taking this into consideration, five unbalanced current levels of 0.5%, 1%, 1.5%, 2%, and 3% are chosen.…”

Section: Without Mitigationmentioning

confidence: 99%

Study on location of reference electrode for measurement of induced alternating current voltage on pipeline

Tang

et al. 2013

Int. Trans. Electr. Energ. Syst.

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Summary Alternating current (AC) interference on pipelines derived from adjacent overhead AC power transmission systems can lead to severe AC corrosion, which will result in the perforation and leakage of buried pipelines and thus has attracted more and more attention to extensive research. Induced AC voltage is one of the important factors for AC corrosion risk assessment, and it has been generally accepted that the induced AC voltage of pipelines to remote earth is the driving force for AC corrosion. However, during the field measurement of induced AC voltage, it is not quite a simple task to determine the ‘true’ position of remote earth for diversified testing conditions. In this work, the effects of multiple contributing factors on the electric field distribution of AC interference are investigated, which include unbalanced current, soil resistivity, coating resistivity, pipeline‐to‐power line distance, and the length of mitigation wire. Furthermore, logically suitable locations for ‘remote earth’ in different scenarios have been suggested with the help of numerical simulation, which can be referenced to improve the measuring accuracy of induced AC voltage. Copyright © 2013 John Wiley & Sons, Ltd.

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“…Due to the importance and complexity of these topics, scientific research on the subject is still conducted nowadays. The various techniques adopted for the task of computing the induced voltages and currents are generally based either on analytical calculations [1][2][3] or on the Finite Element Method (FEM) [4,5]. Furthermore, some other recent works are based on hybrid techniques [6,7], in which FEM is used to compute equivalent lumped parameters that can be used to obtain the induced voltages and currents.…”

Section: Introductionmentioning

confidence: 99%

A Comparison Between Carson's Formulae and a 2d Fem Approach for the Evaluation of Ac Interference Caused by Overhead Power Lines on Buried Metallic Pipelines

Cristofolini¹,

Popoli²,

Sandrolini³

2017

PIER C

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Abstract-In this paper, the AC interference produced by an overhead power transmission line on a buried metallic pipeline is estimated using a circuital method based on the well-known Carson's formulae and a two-dimensional finite element numerical code. The finite element formulation used in this paper implicitly takes into account the mutual inductive coupling between all the considered conductors, and it allows a more detailed analysis in cases where a nonhomogeneous soil is present. The FEM approach includes a procedure which has been developed to enforce that the sum of the currents flowing through the soil, pipeline and eventual overhead ground wire is equal to zero. A case study has been identified, and the results obtained by the two approaches have been compared and discussed.

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AC interference on pipelines due to double circuit power lines: A detailed study

Cited by 69 publications

References 20 publications

Variation in Phase Shift of Phase Arrangements on Magnetic Field Underneath Overhead Double-Circuit Hvtls: Field Distribution and Polarization Study

Variation in Phase Shift of Phase Arrangements on Magnetic Field Underneath Overhead Double-Circuit Hvtls: Field Distribution and Polarization Study

Study on location of reference electrode for measurement of induced alternating current voltage on pipeline

A Comparison Between Carson's Formulae and a 2d Fem Approach for the Evaluation of Ac Interference Caused by Overhead Power Lines on Buried Metallic Pipelines

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