The University of Southampton
University of Southampton Institutional Repository

Partial Discharge Characterization of Streamers in Liquid Nitrogen under Applied AC Voltages

Partial Discharge Characterization of Streamers in Liquid Nitrogen under Applied AC Voltages
Partial Discharge Characterization of Streamers in Liquid Nitrogen under Applied AC Voltages
Streamer growth has been examined with the aim to further understand the issues related to using liquid nitrogen as a part of a dielectric system within power apparatus using high temperature superconducting conductors (HTSC). An experiment has been designed to image streamer events in liquid nitrogen for applied electric fields with alternating current using a technique that allows time correlated partial discharge signal and image capture of the density-change streamers. This method employs high speed digital imaging at 5,000 and 30,000 frames per second with stroboscopic backlighting of samples. Samples are point-plane with divergent electric field geometry and consists of liquid nitrogen and a composite solid barrier preventing total field collapse during discharge. Magnitude of apparent charge and phase relationship of partial electrical discharge in liquid nitrogen have been correlated to simultaneously captured images of the resulting density-change streamer. Images of streamers at different points on the applied wave are shown to highlight that different physical mechanisms of propagation occur. ?-q-n plots of partial discharge activity are presented for a range of applied voltages, bulk liquid temperatures and pressures. Analysis of obtained results support the hypothesis that positive filamentary streamer growth is caused by ionization processes occurring in the liquid phase.
1070-9878
635-646
Swaffield, D J
31f6f52e-fb48-44f9-99d3-3cbd2539f1b9
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Swingler, S G
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Swaffield, D J
31f6f52e-fb48-44f9-99d3-3cbd2539f1b9
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Swingler, S G
4f13fbb2-7d2e-480a-8687-acea6a4ed735

Swaffield, D J, Lewin, P L, Chen, G and Swingler, S G (2008) Partial Discharge Characterization of Streamers in Liquid Nitrogen under Applied AC Voltages. IEEE Transactions on Dielectrics & Electrical Insulation, 15 (3), 635-646.

Record type: Article

Abstract

Streamer growth has been examined with the aim to further understand the issues related to using liquid nitrogen as a part of a dielectric system within power apparatus using high temperature superconducting conductors (HTSC). An experiment has been designed to image streamer events in liquid nitrogen for applied electric fields with alternating current using a technique that allows time correlated partial discharge signal and image capture of the density-change streamers. This method employs high speed digital imaging at 5,000 and 30,000 frames per second with stroboscopic backlighting of samples. Samples are point-plane with divergent electric field geometry and consists of liquid nitrogen and a composite solid barrier preventing total field collapse during discharge. Magnitude of apparent charge and phase relationship of partial electrical discharge in liquid nitrogen have been correlated to simultaneously captured images of the resulting density-change streamer. Images of streamers at different points on the applied wave are shown to highlight that different physical mechanisms of propagation occur. ?-q-n plots of partial discharge activity are presented for a range of applied voltages, bulk liquid temperatures and pressures. Analysis of obtained results support the hypothesis that positive filamentary streamer growth is caused by ionization processes occurring in the liquid phase.

Text
04543099.pdf - Version of Record
Restricted to Registered users only
Download (3MB)
Request a copy

More information

Published date: 15 June 2008
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 265956
URI: http://eprints.soton.ac.uk/id/eprint/265956
ISSN: 1070-9878
PURE UUID: c2b2d05c-e7f6-43e2-aeac-a2952aedcc3e
ORCID for P L Lewin: ORCID iD orcid.org/0000-0002-3299-2556

Catalogue record

Date deposited: 16 Jun 2008 17:49
Last modified: 15 Mar 2024 02:43

Export record

Contributors

Author: D J Swaffield
Author: P L Lewin ORCID iD
Author: G Chen
Author: S G Swingler

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.

×