University of Leicester
Browse
Dielectric Response and Space Charge in Epoxy.pdf (1.32 MB)

Dielectric response and space charge in epoxy impregnated paper composite laminates

Download (1.32 MB)
journal contribution
posted on 2020-02-28, 11:28 authored by Qingyu Wang, Zongren Peng, SJ Dodd, LA Dissado, NM Chalashkanov
As the main material of the converter transformer dry-type bushing, the dielectric properties of epoxy/crepe paper at different temperatures and frequencies are related to the electric field and thermal field distribution of the bushing, which directly affects the safe and stable operation of the bushing. Here we report the dielectric response of samples of dry-type bushing insulation measured at a range of temperatures appropriate to operation and down to frequencies below those usually used. A significant loss peak observed below power frequency is interpreted as originating from the charging of internal epoxy resin interfaces by the transport of charge carriers on structured paths in the epoxy-impregnated crepe paper layers. A simulation model is proposed that allows estimation of the space charge and field distribution at any given frequency.

History

Citation

IEEE Transactions on Dielectrics and Electrical Insulation ( Volume: 26 , Issue: 5 , Oct. 2019 )

Author affiliation

Department of Engineering

Version

  • AM (Accepted Manuscript)

Published in

IEEE Transactions on Dielectrics and Electrical Insulation

Volume

26

Issue

5

Pagination

1532 - 1540

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

issn

1070-9878

eissn

1558-4135

Acceptance date

2019-09-25

Copyright date

2019

Publisher version

https://ieeexplore.ieee.org/document/8858122

Language

English