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Effect of voltage reversal on space charge in oil and oil-impregnated pressboard under temperature gradient

Effect of voltage reversal on space charge in oil and oil-impregnated pressboard under temperature gradient
Effect of voltage reversal on space charge in oil and oil-impregnated pressboard under temperature gradient

Polarity reversal operation can affect the stability of the converter transformers due to the sudden electric field enhancement within the oil. With the purpose to study the transient electric field of oil after polarity reversal operation, the pulsed electroacoustic (PEA) method will be utilized in this paper to measure the space charge of two layers oil and pressboard during the polarity reversal operation. Two factors including different polarities of voltage and the temperature gradient effect are focused in this paper. Experimental results indicate that after the polarity reversal operation, the maximum electric field of the oil is higher when the polarity changed from negative (-) to positive (+) compared to the reversed voltage polarity operation under the temperature gradient. Moreover, the maximum electric field in the oil gap occurs at the transient state after the polarity reversal operation under the ambient temperature while that occurs at the steady state under the temperature gradient.

oil and oil-impregnated pressboard, PEA method, polarity reversal, Space charge, temperature gradient
98-101
Institute of Electrical and Electronics Engineers Inc.
Huang, Bo
8213448b-060c-4d70-b898-d00c6ac754a5
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Xu, Zhiqiang
743b5214-0142-4fbe-aaf8-2e1c03e29d44
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Tang, Chao
2aa1528d-e0fb-4f9a-ba6b-fe98d714c36f
Huang, Bo
8213448b-060c-4d70-b898-d00c6ac754a5
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Xu, Zhiqiang
743b5214-0142-4fbe-aaf8-2e1c03e29d44
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Tang, Chao
2aa1528d-e0fb-4f9a-ba6b-fe98d714c36f

Huang, Bo, Hao, Miao, Xu, Zhiqiang, Chen, George and Tang, Chao (2018) Effect of voltage reversal on space charge in oil and oil-impregnated pressboard under temperature gradient. In ICPADM 2018 - 12th International Conference on the Properties and Applications of Dielectric Materials. vol. 2018-May, Institute of Electrical and Electronics Engineers Inc. pp. 98-101 . (doi:10.1109/ICPADM.2018.8401112).

Record type: Conference or Workshop Item (Paper)

Abstract

Polarity reversal operation can affect the stability of the converter transformers due to the sudden electric field enhancement within the oil. With the purpose to study the transient electric field of oil after polarity reversal operation, the pulsed electroacoustic (PEA) method will be utilized in this paper to measure the space charge of two layers oil and pressboard during the polarity reversal operation. Two factors including different polarities of voltage and the temperature gradient effect are focused in this paper. Experimental results indicate that after the polarity reversal operation, the maximum electric field of the oil is higher when the polarity changed from negative (-) to positive (+) compared to the reversed voltage polarity operation under the temperature gradient. Moreover, the maximum electric field in the oil gap occurs at the transient state after the polarity reversal operation under the ambient temperature while that occurs at the steady state under the temperature gradient.

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More information

Published date: 29 June 2018
Venue - Dates: 12th International Conference on the Properties and Applications of Dielectric Materials, Xi'an, China, 2018-05-20 - 2018-05-24
Keywords: oil and oil-impregnated pressboard, PEA method, polarity reversal, Space charge, temperature gradient

Identifiers

Local EPrints ID: 424942
URI: http://eprints.soton.ac.uk/id/eprint/424942
PURE UUID: 08118f1f-5f01-471f-b2a5-3800b6bd9f0d

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Date deposited: 05 Oct 2018 16:30
Last modified: 13 Mar 2019 18:13

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Contributors

Author: Bo Huang
Author: Miao Hao
Author: Zhiqiang Xu
Author: George Chen
Author: Chao Tang

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