Simulation of dielectric frequency response of transformer insulation system
Simulation of dielectric frequency response of transformer insulation system
Frequency domain spectroscopy has been widely used to monitor the condition of insulation system in power transformers. For a core type of transformer, a simplified XY model of a duct has been developed which allows one to examine the contribution from oil, barrier and spacer to the overall dielectric measurement. In the present paper, we have constructed a 3D model of the duct to investigate the effects of degree of polymerization, temperature and geometry on the results such as dissipation factor and complex permittivity. The results are compared with the X-Y model so the accuracy of the simplified model can be evaluated. It reveals that the major differences between X-Y and 3D models lie in the lower frequency region and the difference is varied with the effects of degree of polymerisation, temperature and geometry of the insulation. As the dielectric response in the low frequency region is often used to estimate the moisture, the simplified X-Y model may result in potential error in estimation of moisture content in the oil-paper insulation system.
848-853
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Yu, Guo
b53a00da-4e4b-4036-b6d0-656ea9184708
25 August 2013
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Yu, Guo
b53a00da-4e4b-4036-b6d0-656ea9184708
Chen, George and Yu, Guo
(2013)
Simulation of dielectric frequency response of transformer insulation system.
18th International Symposium on High Voltage Engineering, Seoul, Korea, Republic of.
25 - 30 Aug 2013.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Frequency domain spectroscopy has been widely used to monitor the condition of insulation system in power transformers. For a core type of transformer, a simplified XY model of a duct has been developed which allows one to examine the contribution from oil, barrier and spacer to the overall dielectric measurement. In the present paper, we have constructed a 3D model of the duct to investigate the effects of degree of polymerization, temperature and geometry on the results such as dissipation factor and complex permittivity. The results are compared with the X-Y model so the accuracy of the simplified model can be evaluated. It reveals that the major differences between X-Y and 3D models lie in the lower frequency region and the difference is varied with the effects of degree of polymerisation, temperature and geometry of the insulation. As the dielectric response in the low frequency region is often used to estimate the moisture, the simplified X-Y model may result in potential error in estimation of moisture content in the oil-paper insulation system.
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Published date: 25 August 2013
Venue - Dates:
18th International Symposium on High Voltage Engineering, Seoul, Korea, Republic of, 2013-08-25 - 2013-08-30
Organisations:
EEE
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Local EPrints ID: 356493
URI: http://eprints.soton.ac.uk/id/eprint/356493
PURE UUID: 50d97b6d-7e1f-450e-a754-09f0a2162273
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Date deposited: 09 Oct 2013 13:33
Last modified: 14 Mar 2024 14:49
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Author:
George Chen
Author:
Guo Yu
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