On the aging mechanism of solid insulating materials exposed to repetitive high voltage pulses

authored by

K. Niayesh, Ernst Gockenbach

Abstract

This paper proposes an explanation for the aging of solid insulating materials exposed to high frequency voltage impulses based on thermal stimulating processes triggered by losses generated in insulating materials due to damped oscillations of molecular dipoles in high frequency electrical fields. For this purpose, total dissipation of insulating materials is calculated based on frequency domain description of applied voltage and frequency dependent dielectric properties of insulating materials. To validate the proposed theory, different experimental investigations are carried out on thin oil impregnated paper exposed to high voltage square wave shape pulses with different pulse durations, rise times and repetition rates. The trends obtained in experimental studies can be satisfactorily explained using the proposed theory.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

External Organisation(s)

University of Tehran

Type

Article

Journal

IEEE Transactions on Dielectrics and Electrical Insulation

Volume

21

Pages

304-310

No. of pages

7

ISSN

1070-9878

Publication date

02.2014

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electrical and Electronic Engineering

Electronic version(s)

https://doi.org/10.1109/TDEI.2013.004055 (Access: Closed)