A new concept in construction of cable terminations for medium voltages

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

doi:10.1109/61.686964

Cited by 13 publications

(5 citation statements)

References 7 publications

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“…On the basis of the expressions for potential (5)(6)(7)(8), and for L L L 1 2 = = , approximate expressions for electric field's radial and axial components are determined.…”

Section: A Geometric Methods For Cable Terminations Modellingmentioning

confidence: 99%

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New EEM/BEM hybrid method for electric field calculation in cable terminations

Raicevic

Tasić

Ilić

et al. 2011

2011 IEEE EUROCON - International Conference on Computer as a Tool

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From the aspect of design and operation, cables and cable accessories are still very actual. Technological developments and the increasing need for electricity cause wider everyday cable termination applications. To ensure reliable performance over the cable system lifetime, design concepts, based on numerical calculations, must be correct. An Equivalent Electrodes Method/Boundary Elements Method-hybrid approach that allows electromagnetic field calculations in multilayer dielectric media including inhomogeneous regions is presented. Applications of the method to electric field calculations in cable terminations with finite thickness of dielectric stripes and stress cones are presented. Electric field distribution is considered for multilayer dielectrics with constant dielectric permittivity. The proposed method obtained results are compared with values obtained by using the finite elements method. It is shown that application of this hybrid numerical method is easier than the finite elements calculations in complex regions, and that the high degree of accuracy is achieved along with saving the computational time. A number of different constructions of cable terminations are experimentally verified using the proposed hybrid method.

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“…On the basis of the expressions for potential (5)(6)(7)(8), and for L L L 1 2 = = , approximate expressions for electric field's radial and axial components are determined.…”

Section: A Geometric Methods For Cable Terminations Modellingmentioning

confidence: 99%

“…There is a number of cable terminations developed in the last few years [8], but cable failures still happen, causing a great economic loss. For that reason any improvement in the cable termination construction is of interest.…”

Section: Introductionmentioning

confidence: 99%

New EEM/BEM hybrid method for electric field calculation in cable terminations

Raicevic

Tasić

Ilić

et al. 2011

2011 IEEE EUROCON - International Conference on Computer as a Tool

View full text Add to dashboard Cite

show abstract

“…In this way is reduced emission of strong electric field in environment. Nonlinear materials, i.e., materials whose resistivity vary with applied voltage, are among the most recent developments for stress-control systems (Pokryvailo et al, 2010;Nikolajevic et al, 1998;Dimitrijevic et al, 2011).…”

Section: Modeled Cable Termination 1019mentioning

confidence: 99%

“…Geometric grading (Raicevic et al, 2011;Raicevic, 1999Raicevic, , 2008) can be implemented by adding a cone-shaped (stress cone) dielectric. Another solution is to add a shaped multi-dielectric layer (Raicevic et al, 2010;Pokryvailo et al, 2010;Nikolajevic et al, 1998) of insulation with a different permittivity than the surrounding region.…”

Section: Introductionmentioning

confidence: 99%

Reducing the impact of ELF electromagnetic fields of HV power cables on the environment by modeling the cable accessories

Raicevic

2015

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

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Purpose – Underground cables can produce higher electromagnetic fields directly above them than an overhead line. The majority of cable failures on distribution system are caused by defects in the cable accessories. Nowadays, significant research has been carried out worldwide into examining whether electricity, and in particular, the presence of electric and magnetic fields have an adverse impact on health, especially the occurrence of cancer and childhood leukemia. The purpose of this paper is to optimize the electric field distribution in underground cable accessories. This reduces the impact of the harmful effects of the fields on living beings and humans. Design/methodology/approach – Cable terminations and joints are designed to eliminate the stress concentration at the termination screen to avoid the breakdown of the cable and high values of electric field at these points. Any improvement in the cable termination and joints construction is of great interest. There are several methods for the solution of electric field distribution. These can be summarized as analytical, experimental, free-hand field mapping, analogue methods and numerical methods. In this paper cable accessories are modeled by using multilayer dielectric system and very thin deflector’s cones. Findings – This model includes specific insulators design and smart choice of electrodes position. Stress-grading nonlinear materials in form of tapes and tubes were used with much success. In order to optimize the cable joint parameters, two criteria were monitored – total electric field magnitude and magnitude of the tangential component. More than 30 percent is reduced impact of cables on the environment. Originality/value – In order to investigate the accuracy of the applied numerical model, various configurations of the cable accessories are studied. The first time is applied new Hybrid Boundary Elements Method on the protection of the environment.

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“…The cable accessories should operate safely same with cable body in a long terms, and has the same service life with the cable. High voltage cable connection head must cores, insulate well and the structure complies with the critical strip cut size in general [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Development of a Novel High Voltage Cable Head Positioner for Scribing and Cutting

Zhu

et al. 2014

AMM

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Principle of vernier caliper is a reference of the working principle of high voltage cable head positioner for scribing and cutting (HVCHPSC), considering the HVCHPSC is suitable for 35kV and below grade high voltage cable termination, the desired measurement range and position is 0-600mm and the measurement accuracy is 0.1mm of HVCHPSC are determined. According to the characteristics of production and installation process during 35kV and lower grade high voltage cable termination, identified the desired number of vernier on HVCHPSC is six, the required measuring span is 20mm. Designed and produced HVCHPSC, mainly constructed of a set of main scale and six sets of deputy ruler, each of which have a snap ring structure match with high voltage cable. Tests proved that the tool is easy to use, precise in positioning, well in performance.

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A new concept in construction of cable terminations for medium voltages

Cited by 13 publications

References 7 publications

New EEM/BEM hybrid method for electric field calculation in cable terminations

New EEM/BEM hybrid method for electric field calculation in cable terminations

Reducing the impact of ELF electromagnetic fields of HV power cables on the environment by modeling the cable accessories

Development of a Novel High Voltage Cable Head Positioner for Scribing and Cutting

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