Finite element method modeled dielectric response for condition evaluation of transformer insulation

Cui, Yi, Ekanayake, Chandima, Saha, Tapan K., Du, Peidong and Ma, Hui (2013). Finite element method modeled dielectric response for condition evaluation of transformer insulation. In: 2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Chenzhen, China, (39-42). 20-23 October 2013. doi:10.1109/CEIDP.2013.6748314

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Author Cui, Yi
Ekanayake, Chandima
Saha, Tapan K.
Du, Peidong
Ma, Hui
Title of paper Finite element method modeled dielectric response for condition evaluation of transformer insulation
Conference name 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
Conference location Chenzhen, China
Conference dates 20-23 October 2013
Proceedings title 2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)   Check publisher's open access policy
Journal name Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP   Check publisher's open access policy
Place of Publication Piscataway, NJ, United States
Publisher IEEE
Publication Year 2013
Year available 2013
Sub-type Fully published paper
DOI 10.1109/CEIDP.2013.6748314
Open Access Status
ISBN 9781479925971
ISSN 0084-9162
Start page 39
End page 42
Total pages 4
Collection year 2014
Language eng
Abstract/Summary Defects such as cracks and voids in the insulation medium of a power transformer may affect the dielectric response of transformer insulation system. This paper uses the finite element method (FEM) to analysis the influence of electric field distribution on the dielectric response of transformer oilpaper insulation system. Firstly a simple transformer winding insulation model consisting of several layers of pressboard and oil ducts is established in FEM. Here, two circumstances are taken into consideration to represent normal insulation and insulation with cracks penetrating all the layers. The complex capacitance (real part and imaginary part) is calculated to obtain general tendency of dielectric response of winding insulation in a transformer. Secondly, this paper proposes FEM model of a three phase oil-immersed power transformer insulation system. Based on the developed model, the dependency between electric field displacement, current density at the selected point with the applied electric field is discussed in detail. Moreover, the complex capacitance of transformer insulation is also studied. This will help to understand the correlations among insulation defects, electric field variations, and dielectric response of insulation.
Keyword Dielectric response
Insulation degradation
Oil-paper insulation
FEM
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Wed, 12 Mar 2014, 11:47:10 EST by Ms Dulcie Stewart on behalf of Scholarly Communication and Digitisation Service