Optimization of cable terminations

Nikolajevic, S.V.; Pekarić-Nađ, Neda; Dimitrijevic, R.M.

doi:10.1109/61.584315

Cited by 24 publications

(9 citation statements)

References 2 publications

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“…HIGH-VOLTAGE E-field grading [1][2][3][4] is typically implemented via the use of composites with high dielectric constant or composites that possess desirable high field nonlinear resistive behavior. The latter, high field nonlinear resistive field grading composites [4][5][6][7][8][9][10], which serve to avoid excess electrical stress concentrations under both ac and dc applications, are commonly made of an insulating polymer matrix, especially rubber such as ethylene propylene diene monomer (EPDM) or silicone rubber, loaded with conducting carbon black, and/or ceramic semiconductor such as SiC, ZnO, or even an organic semiconductor like polyaniline emeraldine base.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms leading to nonlinear electrical response of a nano p-SiC/silicone rubber composite

Wang

Nelson

Schadler

et al. 2010

IEEE Trans. Dielect. Electr. Insul.

104

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It is well known that hopping of charge carriers via spatially and energetically distributed localized states is a primary transport mechanism in many disordered semiconductors and polymeric dielectrics. In this contribution, the nonlinear I-V physics of a 25vol% 50nm p-SiC/silicone rubber composite for high voltage field grading application was investigated, and a composite bulk hopping mechanism proposed. It is hypothesized that nearest-neighbor hole hopping occurs through thin rubbery layers between the SiC particles, and is the mechanism governing the nonlinear electric response of SiC/silicone rubber nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Mechanisms leading to nonlinear electrical response of a nano p-SiC/silicone rubber composite

Wang

Nelson

Schadler

et al. 2010

IEEE Trans. Dielect. Electr. Insul.

104

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“…At the places of cable connecting, the exterior cover is removed and the radial character of electric field is disturbed. There is high intensity of axial electric field at the end of the cable isolation [10][11][12][13][14][15][16][17].…”

Section: N Raičevićmentioning

confidence: 99%

Electrical field modelling at the cable joints

Raicevic

2007

FACTA U EE

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There is a large number of parameters that influence to the way of the producing cable joints, and therefore the greatest attention is paid on the electrical field density shaping. This is done in order to efficiently reduce electrical field density, especially the tangential electrical field component at the insulator surface. The described problem solving presents very important and complex task of high power technology for producing power cables and corresponding accessories. Finite elements method, finite difference method, charge simulation method, boundary relaxation method or boundary elements method can be applied for cable joints calculations, as well as equivalent electrodes method (EEM) [1, 2]. The simplest calculation can be carried out using equivalent electrodes method and it obtains very high accuracy of calculated values. Equivalent electrodes method is applied on non-modelled, as well as on some geometrically modelled cable joints, when they are assumed as deflectors of funnel form, which border lines can have elliptical shape, the shape of polynomial or exponential function, as well as the form generated as the combination of the shapes mentioned above. The results for the distribution of the electrical potential, radial and axial electrical field components are presented in the paper. The equipotential surfaces in the vicinity of cable joints are also presented.

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“…Several techniques are in vogue, e.g. electrode shape modification (geometric control) [5], use of very high permittivity material (refractive control) [6,7] or use of material with relatively high conductivity (impedance control) [8][9][10][11]. However, all such methods have drawbacks.…”

Section: Introductionmentioning

confidence: 99%