The University of Southampton
University of Southampton Institutional Repository

Space charge and AC electric breakdown strength in polyethylene

Space charge and AC electric breakdown strength in polyethylene
Space charge and AC electric breakdown strength in polyethylene
The effect of space charge on dielectric performances is generally neglected under high voltage alternate current (HVAC) electric fields, due to the limited charge amount accumulated. This paper intends to expound the characteristics of space charge in polymeric under AC stresses and its importance to the breakdown strength of polyethylene. A numerical model based on space charge dynamics under high voltage electric fields has been used to explain the differences of the breakdown strength in polyethylene under AC and DC stresses. Bipolar charge transport theory is adopted to analyse the charge transportation processes. Space charge profiles at the time of breakdown occurrence under different electric fields (including DC voltage, 0.5, 5 and 50 Hz AC voltages) and in the samples with different thicknesses (from 50 to 200 µm) are simulated. The relationship between space charge and the breakdown strength is discussed. The simulated results agree well with the trend of experimental breakdown results: generally, breakdown occurs easier under AC stress than DC stress; the breakdown strength is increased with the decrease of the sample thickness. The results suggest the presence of space charge under AC stresses has a great impact on electric breakdown strength of the material.
978 - 1 - 4673 - 7498 - 9
Zhou, Churui
c790215c-c3e7-4398-bb05-c4f9fc27558f
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhou, Churui
c790215c-c3e7-4398-bb05-c4f9fc27558f
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Zhou, Churui and Chen, G. (2015) Space charge and AC electric breakdown strength in polyethylene. IEEE Conference on Electrical Insulation and Dielectric Phenomena, United States. 18 - 20 Oct 2015. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

The effect of space charge on dielectric performances is generally neglected under high voltage alternate current (HVAC) electric fields, due to the limited charge amount accumulated. This paper intends to expound the characteristics of space charge in polymeric under AC stresses and its importance to the breakdown strength of polyethylene. A numerical model based on space charge dynamics under high voltage electric fields has been used to explain the differences of the breakdown strength in polyethylene under AC and DC stresses. Bipolar charge transport theory is adopted to analyse the charge transportation processes. Space charge profiles at the time of breakdown occurrence under different electric fields (including DC voltage, 0.5, 5 and 50 Hz AC voltages) and in the samples with different thicknesses (from 50 to 200 µm) are simulated. The relationship between space charge and the breakdown strength is discussed. The simulated results agree well with the trend of experimental breakdown results: generally, breakdown occurs easier under AC stress than DC stress; the breakdown strength is increased with the decrease of the sample thickness. The results suggest the presence of space charge under AC stresses has a great impact on electric breakdown strength of the material.

Text
CEIDP2015-000158.pdf - Accepted Manuscript
Download (1MB)

More information

Published date: 18 October 2015
Venue - Dates: IEEE Conference on Electrical Insulation and Dielectric Phenomena, United States, 2015-10-18 - 2015-10-20
Organisations: EEE

Identifiers

Local EPrints ID: 383626
URI: http://eprints.soton.ac.uk/id/eprint/383626
ISBN: 978 - 1 - 4673 - 7498 - 9
PURE UUID: fef20b0b-06d7-4740-a714-af62b1779bb2

Catalogue record

Date deposited: 27 Nov 2015 12:08
Last modified: 02 Dec 2019 20:29

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×