Polymer insulated high voltage cables

Vahedy, V.

doi:10.1109/mei.2006.1639025

Cited by 66 publications

(35 citation statements)

References 23 publications

(9 reference statements)

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“…Manufacture of cables with XLPE insulation is carried out on electrical complexes consisting of dozens of local systems interconnected via mobile cable products under the conditions of many undetermined disturbing factors [1][2][3]. The application of polyethylene insulation to a conductive core that moves at a speed of about 50 m/min is car ried out using a unit of three extruders 1 (Fig.…”

Section: The Object Of Research and Its Technological Auditmentioning

confidence: 99%

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Identification of the parameters of the cable production process

Ostroverkhov

Silvestrov

Kryvoboka³

2017

TAPR

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Section: The Object Of Research and Its Technological Auditmentioning

confidence: 99%

“…A significant amount of scientific research has been devoted to the problem of parametric identification in the industrial production of cables [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, in the modern theory of identi fication there is a significant gap between the theoretical part and the real situation.…”

Section: Introductionmentioning

confidence: 99%

Identification of the parameters of the cable production process

Ostroverkhov

Silvestrov

Kryvoboka³

2017

TAPR

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“…Currently, XLPE is often used as insulation in high‐voltage cable of up to 220 kV. Some XLPE insulation cable of 500 kV has also been used in extra high‐voltage line . During the application of high‐voltage cable, it was found that such insulators trap charge carriers (electrons and/or ions) to form ‘‘space charges’’ that have been thought to be correlated with electric breakdown or electrical tree.…”

Section: Introductionmentioning

confidence: 99%

Trap mechanism based on frontier molecular orbitals of additives in polyethylene insulators: A theoretical study and molecular design strategy

Yang

Zhang

Zhao

et al. 2015

Int. J. Quantum Chem.

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In this work, the energy gaps (E g ) of highest occupied orbitals and lowest unoccupied orbitals, trap energies (E t (e) and E t (h)) and excited energies of polyethylene model compound, typical defect compound, acetophonene, and 33 designed additives are obtained using density functional method at B3LYP/6-3111G(d, p) level. The correlation between trapping-electrons (holes) abilities of additives and molecular frontier orbitals is established, and a new understanding for trap mechanism based on chemical molecular orbital levels is given for the first time which could be used to filter qualitative additives as volt-age stabilizers of polyethylene. The role of trap energies and the energy gaps on discussing space charge accumulation and electric breakdown is analyzed in detail. A molecular design strategy for potential additives of cross-linked polyethylene insulated high-voltage cable is shown based on conjugation effect, substituents character, and polycyclic aromatic compounds.

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“…Because of the intrinsic breakdown strength of up to 800kV/mm and increased maximum operating temperature from 70°C to 90°C after cross linking [2], XLPE cables are the best choice and dominating in power industry nowadays. Since the XLPE cables were introduced in the 1960s, numerous tests on cables at all voltages have clearly shown that the semiconductive screening layers play a very important role in the successful operation of a power cable.…”

Section: Introductionmentioning

confidence: 99%

“…In power cables, conducting carbon black (CB)-filled ethylene copolymers, such as ethylene-butyl acrylate, ethylene vinyl acetate and ethylene ethyl acrylate, are commonly used as a semiconducting layer [2]. Different kinds of cables should have different suitable shields.…”

Section: Introductionmentioning

confidence: 99%

Influence of semicon shields on the dielectric loss of XLPE cables

Liu

Fothergill

Dodd

et al. 2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-Dielectric response measurement techniques in both time and frequency domains are studied in order to measure the dielectric loss of XLPE cables, which have very low losses. A high sensitivity transformer ratio bridge system, which can measure loss tangents as low as 10 -5 , has been developed with the ability to measure these cables. A tuned amplifier was designed to help to extend the frequency range from 200Hz to 20kHz. Different model cables from Borealis AB with different semiconducting materials have been measured in the temperature range 15⁰C to 120⁰C. It is found that the semiconducting layers dominate the dielectric loss in the insulation system of the XLPE cables, when the outer semicon is treated as measuring electrode. In this case, steadily increasing dielectric loss has been measured at higher frequencies. The resistivity of the semiconducting materials was measured, which confirmed that the increasing slope is due to the semiconducting layers. After using conductive tapes to wrap the cable samples, monotonically decreasing losses were measured, corresponding to the actual dielectric frequency response of the XLPE cables. It is concluded that the axial resistance of semiconducting shields have a substantial influence on the dielectric loss of XLPE cables, especially for dielectric response in high frequency range. A device on measuring the loss of such cables is presented. Permanent repository link

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Polymer insulated high voltage cables

Cited by 66 publications

References 23 publications

Identification of the parameters of the cable production process

Identification of the parameters of the cable production process

Trap mechanism based on frontier molecular orbitals of additives in polyethylene insulators: A theoretical study and molecular design strategy

Influence of semicon shields on the dielectric loss of XLPE cables

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