A model for the simulation of relaxation phenomena in dielectrics

Author

Esposti, G. Degli ; Tommasini, D.

Author_Institution

Dept. of Electr. Eng., Pavia Univ., Italy

Volume

25

Issue

4

fYear

1990

fDate

8/1/1990 12:00:00 AM

Firstpage

617

Lastpage

621

Abstract

A simulation of the behavior of the complex permittivity in a polymeric material as a function of frequency is presented. Starting from experimental data and taking into account the occurrence of a distribution function in the relaxation times, an electrical equivalent circuit for each material can be established. Then, the model is used to analyze some insulating systems. The curves are calculated for a stratified insulation and for a single material subjected to chemical degradation. An experimental study on ad hoc polypropylene films purposely processed with different concentrations of a particular polar additive is presented and discussed on the basis of the model. Several possible applications are considered

Keywords

dielectric relaxation; equivalent circuits; organic insulating materials; permittivity; polymer films; complex permittivity; distribution function; electrical equivalent circuit; insulating systems; polar additive; polymeric material; polypropylene films; relaxation phenomena; stratified insulation; Chemicals; Circuit simulation; Degradation; Dielectric materials; Distribution functions; Equivalent circuits; Frequency; Insulation; Permittivity; Polymers;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.57082

Filename

57082