Highly efficient shielding of high-voltage underground power lines by pure iron screens

Zucca, M.; Lorusso, Giulia; Fiorillo, F.; Roccato, Paolo Emilio; Annibale, M.

doi:10.1016/j.jmmm.2008.04.096

Cited by 13 publications

(8 citation statements)

References 8 publications

(6 reference statements)

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“…The low-frequency magnetic field produced by buried high-voltage (HV) power lines has drawn a great attention in recent years. The magnetic induction in the vicinity of these cables can reach levels of a few mT or more, depending on the distance from them, the currents they carry and the cable configuration [5]. These field levels are undesirable, as they may produce electromagnetic interferences in electric and electronic equipment and cause health hazards.…”

Section: Introductionmentioning

confidence: 99%

Influence of contact resistance on shielding efficiency of shielding gutters for high-voltage cables

Köroğlu

Sergeant

Sabariego

et al. 2011

IET Electr. Power Appl.

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The shielding of buried three-phase high-voltage power lines can be done by placing them in conducting ferromagnetic U-shaped gutters covered with plates. In case of a perfect electrical contact between adjacent gutters and between adjacent cover plates, induced currents in the shield efficiently reduce the magnetic field generated by the cables. As however a perfect contact cannot be guaranteed, in practice, it is useful to quantify the effect of a defective electrical contact on the field reduction. From two-dimensional/ three-dimensional finite element computations and experiments, the influence of the contact resistance on the shielding efficiency is investigated, as a function of the ratio of axial length to height of the shield elements. Furthermore, the effect of other parameters on the shielding efficiency is studied: the ratio of axial length to height, a parasitic air gap between the gutter and the cover plate and the type of the shield material. It was found that a low contact resistance deteriorates much more the shielding in case of an aluminium shield than in case of a steel shield. As expected, the effect is larger for shield elements with relatively short axial length with regard to the other dimensions. Nevertheless, the effect remains quite significant for aluminium shields with practically convenient dimensions

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Section: Introductionmentioning

confidence: 99%

Influence of contact resistance on shielding efficiency of shielding gutters for high-voltage cables

Köroğlu

Sergeant

Sabariego

et al. 2011

IET Electr. Power Appl.

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“…On the other hand, other studies try to discover new developments on cables for the EU [40]. These studies focus on new construction and installation techniques as well as new materials [43].…”

Section: Infrastructurementioning

confidence: 99%

Electric power transmission: An overview of associated burdens

Doukas

Karakosta

Flamos

et al. 2010

Int. J. Energy Res.

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SUMMARYTransmission operators and regulators face the enormous challenge to meet both the request for a high-performing grid as well as the public's concern about the burdens of electric power transmission. Although huge infrastructural projects for the development of interconnections are at several stages, the associated transmission burdens are not yet fully incorporated in the respective socioeconomic analysis. In this respect, the aim of this paper is to present a collective summary of electricity transmission burdens and their associated impacts. To increase coherence, the burdens have been classified in the following categories: transmission losses; electromagnetic fields; infrastructure; visual intrusion; noise; interruption of supply; land use; ecosystems; and property values. Moreover, the burdens relation with transmission technologies and associated impacts are illustrated in original overview tables.

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“…9. The results are significantly improved when using two opposed U-shaped ferromagnetic laminations disposed to form a closed box, as proposed in [24]. The elements are constituted by zinked iron sheets (electrical conductivity: 6.5 MS/m, maximum relative permeability: 975) with a thickness of 3 mm, width of 1.6 m, and height of 400 mm.…”

Section: E Shielding Solutionsmentioning

confidence: 99%

Evaluation of the Electromagnetic Environment Around Underground HVDC Lines

Zilberti

Pons

Bottauscio

et al. 2010

IEEE Trans. Power Delivery

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This paper analyses the magnetic-field emissions of a high-voltage dc transmission line constituted by two couples of underground cables laid along a highway. The transmission system, including all its components (transformers, converters filters, and line), is modeled through a circuital approach, which provides the distribution of the current harmonics along the line length. The magnetic field produced in the environment is then estimated by a hybrid finite element/boundary element method. The electromagnetic interferences with existing appliances and the human exposure to magnetic fields are investigated considering different laying configurations, conductor dispositions, and supply conditions. Compliance with regulations limiting human exposure and technical standards ensuring electromagnetic compatibility of appliances and devices are assessed.

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Highly efficient shielding of high-voltage underground power lines by pure iron screens

Cited by 13 publications

References 8 publications

Influence of contact resistance on shielding efficiency of shielding gutters for high-voltage cables

Influence of contact resistance on shielding efficiency of shielding gutters for high-voltage cables

Electric power transmission: An overview of associated burdens

Evaluation of the Electromagnetic Environment Around Underground HVDC Lines

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