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Moisture effect on the dielectric response and space charge behaviour of mineral oil impregnated paper insulation

Moisture effect on the dielectric response and space charge behaviour of mineral oil impregnated paper insulation
Moisture effect on the dielectric response and space charge behaviour of mineral oil impregnated paper insulation
Dielectric response and space charge behaviour of oil-paper insulation sample with different moisture contents were investigated using the frequency dielectric spectroscopy (FDS) and the pulsed electroacoustic (PEA) technique, respectively. The influence of moisture on the dielectric response and space charge behaviour of oil impregnated paper insulation was analysed. Results show that the moisture has great effect on the FDS and space charge behaviour of oil impregnated paper insulation. In the frequency range of 10-2~106Hz, the conductivity and the capacitance of oil impregnated paper increases with its moisture content. The space charge distribution of oil-paper sample with lower and higher moisture contents is very different from each other. The higher the moisture concentration of the oil impregnated paper, the easier the negative charge penetration into the insulation paper. There is a significant amount of positive charge accumulated at the paper-paper interface near to the cathode for oilpaper sample with lower moisture content. However, the positive charge appears in the middle layer paper for oil-paper sample with higher moisture content. Due to the high conductivity, the charge trapped in the oil-paper sample with higher moisture content disappears much faster than that in the oil-paper sample with lower moisture content after removing the voltage.
1742-6588
12005
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Liao, Ruijin
e10ba49b-110d-4e1d-a102-b1a4e4a0b7e2
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Liao, Ruijin
e10ba49b-110d-4e1d-a102-b1a4e4a0b7e2

Hao, Jian, Chen, George and Liao, Ruijin (2011) Moisture effect on the dielectric response and space charge behaviour of mineral oil impregnated paper insulation. Journal of Physics: Conference Series, 310, 12005.

Record type: Article

Abstract

Dielectric response and space charge behaviour of oil-paper insulation sample with different moisture contents were investigated using the frequency dielectric spectroscopy (FDS) and the pulsed electroacoustic (PEA) technique, respectively. The influence of moisture on the dielectric response and space charge behaviour of oil impregnated paper insulation was analysed. Results show that the moisture has great effect on the FDS and space charge behaviour of oil impregnated paper insulation. In the frequency range of 10-2~106Hz, the conductivity and the capacitance of oil impregnated paper increases with its moisture content. The space charge distribution of oil-paper sample with lower and higher moisture contents is very different from each other. The higher the moisture concentration of the oil impregnated paper, the easier the negative charge penetration into the insulation paper. There is a significant amount of positive charge accumulated at the paper-paper interface near to the cathode for oilpaper sample with lower moisture content. However, the positive charge appears in the middle layer paper for oil-paper sample with higher moisture content. Due to the high conductivity, the charge trapped in the oil-paper sample with higher moisture content disappears much faster than that in the oil-paper sample with lower moisture content after removing the voltage.

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Published date: 12 August 2011
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272667
URI: http://eprints.soton.ac.uk/id/eprint/272667
ISSN: 1742-6588
PURE UUID: 50f432ba-2d03-4199-b559-3ad52a0b3023

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Date deposited: 16 Aug 2011 08:24
Last modified: 25 Nov 2019 20:58

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