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Space charge characteristics and the electric field distortion after polarity reversal operation in two layers of oil-impregnated paper and oil

Space charge characteristics and the electric field distortion after polarity reversal operation in two layers of oil-impregnated paper and oil
Space charge characteristics and the electric field distortion after polarity reversal operation in two layers of oil-impregnated paper and oil
The formation of space charge in the oil-impregnated paper and oil insulation system under HVDC condition can influence the electric field distribution. In the case of HVDC converter transformer, the distortion of electric field may affect its performance. It is, therefore, important to analyse factors that can affect space charge formation and dissipation characteristics such as moisture, temperature, electric stress level and ageing process. This paper mainly focuses on the effect of oil ageing on space charge characteristics in the oil-impregnated paper and oil system. The pulsed electroacoustic method was used to monitor space charge dynamics and these data were further incorporated into the model established using COMSOL to estimate its impact on electric field distribution. The results show that there is a significant electric field enhancement after polarity reversal operation due to the injected charges. It is also noticed that the status of the oil has a profound effect on the injected charge dynamics, therefore, the electric field enhancement.
Huang, Bo
8213448b-060c-4d70-b898-d00c6ac754a5
Hao, Miao
1ca8b57a-b1a6-40f9-8308-b8dfdfb8aead
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Fu, Jin
ffe9caa5-b98c-41af-aac2-948ad3de0287
Wang, Qian
a9a64412-49cc-4ab7-9bb6-646551219d66
Huang, Bo
8213448b-060c-4d70-b898-d00c6ac754a5
Hao, Miao
1ca8b57a-b1a6-40f9-8308-b8dfdfb8aead
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Fu, Jin
ffe9caa5-b98c-41af-aac2-948ad3de0287
Wang, Qian
a9a64412-49cc-4ab7-9bb6-646551219d66

Huang, Bo, Hao, Miao, Chen, George, Hao, Jian, Fu, Jin and Wang, Qian (2015) Space charge characteristics and the electric field distortion after polarity reversal operation in two layers of oil-impregnated paper and oil. 19th International Symposium on High Voltage Engineering, Czech Republic. 23 - 28 Aug 2015. 6 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

The formation of space charge in the oil-impregnated paper and oil insulation system under HVDC condition can influence the electric field distribution. In the case of HVDC converter transformer, the distortion of electric field may affect its performance. It is, therefore, important to analyse factors that can affect space charge formation and dissipation characteristics such as moisture, temperature, electric stress level and ageing process. This paper mainly focuses on the effect of oil ageing on space charge characteristics in the oil-impregnated paper and oil system. The pulsed electroacoustic method was used to monitor space charge dynamics and these data were further incorporated into the model established using COMSOL to estimate its impact on electric field distribution. The results show that there is a significant electric field enhancement after polarity reversal operation due to the injected charges. It is also noticed that the status of the oil has a profound effect on the injected charge dynamics, therefore, the electric field enhancement.

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Published date: 23 August 2015
Venue - Dates: 19th International Symposium on High Voltage Engineering, Czech Republic, 2015-08-23 - 2015-08-28
Organisations: EEE

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Local EPrints ID: 383649
URI: http://eprints.soton.ac.uk/id/eprint/383649
PURE UUID: e23f1c34-fab2-42b7-8d0c-85d45eba4cd9

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Date deposited: 17 Nov 2015 16:41
Last modified: 27 Nov 2018 17:31

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