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Space charge dynamics in oil-impregnated pressboard under AC electric field

Space charge dynamics in oil-impregnated pressboard under AC electric field
Space charge dynamics in oil-impregnated pressboard under AC electric field
Space charge has been a general concern related with the reliability and the life-time of HVDC components. In this present work, the space charge profiles in oil-impregnated pressboards are investigated by the means of the pulsed electroacoustic (PEA) technique under AC voltage with 50 Hz at the room temperature. It has been observed that the ageing status of the mineral oil and the presence of the oil gap can influence the charge accumulation significantly. In the fresh oil impregnated pressboard, considerable negative charges are accumulated near the aluminium electrode. However, only little or no space charge can be detected in the aged oil impregnated pressboard and the oil gap and pressboard composite insulation system. The results may suggest that the amount of the AC space charge is highly dependent on the charge mobility within the dielectrics. The higher charge mobility can result in a smaller amount of AC space charge.
9781467374989
Hao, Miao
1ca8b57a-b1a6-40f9-8308-b8dfdfb8aead
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Fu, Jin
ffe9caa5-b98c-41af-aac2-948ad3de0287
Wang, Qian
a9a64412-49cc-4ab7-9bb6-646551219d66
Tang, Chao
2aa1528d-e0fb-4f9a-ba6b-fe98d714c36f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Miao
1ca8b57a-b1a6-40f9-8308-b8dfdfb8aead
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Fu, Jin
ffe9caa5-b98c-41af-aac2-948ad3de0287
Wang, Qian
a9a64412-49cc-4ab7-9bb6-646551219d66
Tang, Chao
2aa1528d-e0fb-4f9a-ba6b-fe98d714c36f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Hao, Miao, Hao, Jian, Fu, Jin, Wang, Qian, Tang, Chao and Chen, George (2015) Space charge dynamics in oil-impregnated pressboard under AC electric field. IEEE Conference on Electrical Insulation and Dielectric Phenomena, United States. 18 - 20 Oct 2015. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Space charge has been a general concern related with the reliability and the life-time of HVDC components. In this present work, the space charge profiles in oil-impregnated pressboards are investigated by the means of the pulsed electroacoustic (PEA) technique under AC voltage with 50 Hz at the room temperature. It has been observed that the ageing status of the mineral oil and the presence of the oil gap can influence the charge accumulation significantly. In the fresh oil impregnated pressboard, considerable negative charges are accumulated near the aluminium electrode. However, only little or no space charge can be detected in the aged oil impregnated pressboard and the oil gap and pressboard composite insulation system. The results may suggest that the amount of the AC space charge is highly dependent on the charge mobility within the dielectrics. The higher charge mobility can result in a smaller amount of AC space charge.

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More information

Published date: 18 October 2015
Venue - Dates: IEEE Conference on Electrical Insulation and Dielectric Phenomena, United States, 2015-10-18 - 2015-10-20
Organisations: EEE

Identifiers

Local EPrints ID: 383635
URI: http://eprints.soton.ac.uk/id/eprint/383635
ISBN: 9781467374989
PURE UUID: 8faa8374-fa7e-4240-9ac3-d8ff20076060

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Date deposited: 30 Nov 2015 11:32
Last modified: 04 Nov 2019 20:07

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