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The impacts of the temperature and electric field on the electrical characteristics in semicon-bonded XLPE insulation

The impacts of the temperature and electric field on the electrical characteristics in semicon-bonded XLPE insulation
The impacts of the temperature and electric field on the electrical characteristics in semicon-bonded XLPE insulation
HVDC cables play a vital role in the power transmission system for renewable energy and global power trade. Nowadays, the crosslinked polyethylene (XLPE) extruded cables have been widely applied in power industry due to the superior performance on the thermo-mechanical properties and dielectric properties. The low volume conductivity and the minimized space charge accumulation are the two key requirements for a reliable high voltage direct current (HVDC) cable insulation. This paper reports on the impact of temperature and electric field on the space charge behavior and DC conductivity in XLPE material for cable insulation. The samples were carefully prepared to simulate the real cable insulation structure. A layer of LDPE film mixed with DCP (dicumyl peroxide) was sandwiched between two layers of semicons (also contain crosslink agent) and then crosslinked at 200 ?C to ensure the semicon layers were thermally bonded with the XLPE insulation. The crosslinked samples were then degassed in the vacuum oven with for 6 days at 80 ?C. The space charge characteristics and the conductivity of the semicon-bonded XLPE samples were measured at room temperature and high temperature. The electric fields were kept at 20 kV/mm and 40 kV/mm and the influences of the electric field and the temperature on space charge dynamics and conductivity in the semicon-bonded XLPE samples are discussed.
Hao, M.
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Fazal, A.
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Chen, G.
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Vaughan, A.
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Cao, J.
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Wang, H.
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Hao, M.
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Fazal, A.
926d3b48-d11b-45b1-b922-5c2e8e3ba5fd
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Vaughan, A.
6d813b66-17f9-4864-9763-25a6d659d8a3
Cao, J.
f906efb8-4878-4419-867f-e787b289b00a
Wang, H.
d23f04f1-a300-4744-bd98-2df77c7047df

Hao, M., Fazal, A., Chen, G., Vaughan, A., Cao, J. and Wang, H. (2016) The impacts of the temperature and electric field on the electrical characteristics in semicon-bonded XLPE insulation. IEEE International Conference on High Voltage Engineering and Application (ICHVE 2016), China. 19 - 22 Sep 2016. 4 pp . (doi:10.1109/ICHVE.2016.7800830).

Record type: Conference or Workshop Item (Paper)

Abstract

HVDC cables play a vital role in the power transmission system for renewable energy and global power trade. Nowadays, the crosslinked polyethylene (XLPE) extruded cables have been widely applied in power industry due to the superior performance on the thermo-mechanical properties and dielectric properties. The low volume conductivity and the minimized space charge accumulation are the two key requirements for a reliable high voltage direct current (HVDC) cable insulation. This paper reports on the impact of temperature and electric field on the space charge behavior and DC conductivity in XLPE material for cable insulation. The samples were carefully prepared to simulate the real cable insulation structure. A layer of LDPE film mixed with DCP (dicumyl peroxide) was sandwiched between two layers of semicons (also contain crosslink agent) and then crosslinked at 200 ?C to ensure the semicon layers were thermally bonded with the XLPE insulation. The crosslinked samples were then degassed in the vacuum oven with for 6 days at 80 ?C. The space charge characteristics and the conductivity of the semicon-bonded XLPE samples were measured at room temperature and high temperature. The electric fields were kept at 20 kV/mm and 40 kV/mm and the influences of the electric field and the temperature on space charge dynamics and conductivity in the semicon-bonded XLPE samples are discussed.

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More information

Accepted/In Press date: August 2016
Published date: 29 December 2016
Venue - Dates: IEEE International Conference on High Voltage Engineering and Application (ICHVE 2016), China, 2016-09-19 - 2016-09-22
Organisations: EEE

Identifiers

Local EPrints ID: 402447
URI: http://eprints.soton.ac.uk/id/eprint/402447
PURE UUID: af28551f-2c30-424f-91e2-2269671a6329
ORCID for A. Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 09 Nov 2016 10:40
Last modified: 17 Dec 2019 01:52

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