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Effect of thermally aged oil on space charge dynamics in oil/paper insulation system

Effect of thermally aged oil on space charge dynamics in oil/paper insulation system
Effect of thermally aged oil on space charge dynamics in oil/paper insulation system
The formation of space charge in oil/paper insulation system can lead to material degradation in the high electrical field region and affect system reliability. Therefore, it is important to understand factors that affect space charge formation in oil/paper insulation system. In the present study the effect of thermally aged oil on space charge dynamics in oil/paper insulation system has been investigated using the pulsed electroacoustic (PEA) technique under different dc electrical fields at room temperature. The condition of oil was characterised. The ultraviolet/visible (UV/Vis) spectrum of oil shifts to visible wavelength and the oil acidity increased as the ageing time increased. It has been found that oil property has a significant effect on the space charge distribution of oil/paper insulation system. The more the deterioration of the oil and the higher the applied voltage, the larger the amount of negative charge injected into the paper near to the cathode and the positive charge accumulated at the paperpaper interface near to the cathode. The maximum electric field strength for oil/paper sample with seriously aged oil under 4kV and 6kV is more than 20% higher than its average electric field strength.
1-9
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) Effect of thermally aged oil on space charge dynamics in oil/paper insulation system. CIGRE SC A2/D1 Joint Colloquium on Transformers, Materials and Emerging Test Techniques, Kyoto, Japan. 10 - 15 Sep 2011. pp. 1-9 .

Record type: Conference or Workshop Item (Paper)

Abstract

The formation of space charge in oil/paper insulation system can lead to material degradation in the high electrical field region and affect system reliability. Therefore, it is important to understand factors that affect space charge formation in oil/paper insulation system. In the present study the effect of thermally aged oil on space charge dynamics in oil/paper insulation system has been investigated using the pulsed electroacoustic (PEA) technique under different dc electrical fields at room temperature. The condition of oil was characterised. The ultraviolet/visible (UV/Vis) spectrum of oil shifts to visible wavelength and the oil acidity increased as the ageing time increased. It has been found that oil property has a significant effect on the space charge distribution of oil/paper insulation system. The more the deterioration of the oil and the higher the applied voltage, the larger the amount of negative charge injected into the paper near to the cathode and the positive charge accumulated at the paperpaper interface near to the cathode. The maximum electric field strength for oil/paper sample with seriously aged oil under 4kV and 6kV is more than 20% higher than its average electric field strength.

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Published date: 12 September 2011
Additional Information: Event Dates: September 11 - 16
Venue - Dates: CIGRE SC A2/D1 Joint Colloquium on Transformers, Materials and Emerging Test Techniques, Kyoto, Japan, 2011-09-10 - 2011-09-15
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272809
URI: http://eprints.soton.ac.uk/id/eprint/272809
PURE UUID: 449fcd20-1e24-4e55-aaa0-f06ace5a9ae9

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Date deposited: 20 Sep 2011 08:38
Last modified: 30 Sep 2020 16:32

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