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Space charge behaviour in oil and impregnated pressboard combined insulation system

Space charge behaviour in oil and impregnated pressboard combined insulation system
Space charge behaviour in oil and impregnated pressboard combined insulation system
Dielectric performance of oil-pressboard insulation system used in high voltage direct current (HVDC) convertor transformers can be affected by the presence of space charge. In this paper, the space charge behaviors in a 0.5mm thick oil film combined with a 1mm thick impregnated pressboard have been investigated by the pulsed electroacoustic (PEA) technique under 12kV/mm and 20kV/mm at room temperature. Two types of oil with different aging status were used for comparison. The results show that a charge peak is quickly formed at the interface between oil and pressboard with the same polarity as the electrode at the oil film side. However, the dynamics of the interfacial charges are very different for fresh oil and aged oil samples. The maximum electric field occurs in the middle of the pressboard, which is significantly enhanced in the aged oil samples. Difference in the electric field between those obtained from measurement results and those calculated from Maxwell-Wagner theory has been discussed
978-1-4799-2063-1
1-4
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Zhou, Yuan
22d46dcb-26b9-4416-80a3-efc58d81a061
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wilson, Gordon
fd02d259-a5b6-44ce-be29-47073c552c5b
Jarman, Paul
f0133a9d-702e-489a-afc5-2950eeba10ab
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Zhou, Yuan
22d46dcb-26b9-4416-80a3-efc58d81a061
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wilson, Gordon
fd02d259-a5b6-44ce-be29-47073c552c5b
Jarman, Paul
f0133a9d-702e-489a-afc5-2950eeba10ab

Hao, Miao, Zhou, Yuan, Chen, George, Wilson, Gordon and Jarman, Paul (2014) Space charge behaviour in oil and impregnated pressboard combined insulation system. 2014 IEEE International Conference on Liquid Dielectrics (ICDL), Slovenia. 29 Jun - 03 Jul 2014. pp. 1-4 . (doi:10.1109/ICDL.2014.6893154).

Record type: Conference or Workshop Item (Paper)

Abstract

Dielectric performance of oil-pressboard insulation system used in high voltage direct current (HVDC) convertor transformers can be affected by the presence of space charge. In this paper, the space charge behaviors in a 0.5mm thick oil film combined with a 1mm thick impregnated pressboard have been investigated by the pulsed electroacoustic (PEA) technique under 12kV/mm and 20kV/mm at room temperature. Two types of oil with different aging status were used for comparison. The results show that a charge peak is quickly formed at the interface between oil and pressboard with the same polarity as the electrode at the oil film side. However, the dynamics of the interfacial charges are very different for fresh oil and aged oil samples. The maximum electric field occurs in the middle of the pressboard, which is significantly enhanced in the aged oil samples. Difference in the electric field between those obtained from measurement results and those calculated from Maxwell-Wagner theory has been discussed

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More information

Published date: 30 June 2014
Venue - Dates: 2014 IEEE International Conference on Liquid Dielectrics (ICDL), Slovenia, 2014-06-29 - 2014-07-03
Organisations: EEE

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Local EPrints ID: 373692
URI: http://eprints.soton.ac.uk/id/eprint/373692
ISBN: 978-1-4799-2063-1
PURE UUID: c554cd5b-7b23-483a-889d-44d5e06aa224

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Date deposited: 30 Jan 2015 11:55
Last modified: 02 Dec 2019 20:38

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