The University of Southampton
University of Southampton Institutional Repository

Automatic equal phase shift principle for space charge measurement under periodic stress of arbitrary waveform

Automatic equal phase shift principle for space charge measurement under periodic stress of arbitrary waveform
Automatic equal phase shift principle for space charge measurement under periodic stress of arbitrary waveform
An automatic equal phase shift principle (AEPS) is proposed to simplify space charge detection under periodic stress with the pulsed electroacoustic method. For pulse frequency, fp is a non-integral multiple with periodic stress frequency fa; the detecting phase can be automatically shifted with a certain value after each cycle of periodic stress. The pulse position will be at the same phase of periodic stress after several cycles. The minimum amounts of periodic stress cycles and pulse generated during this process are defined as Na (>1) and Np, respectively. They can be uniquely confirmed by the characteristic equation Na/fa = Np/fp. Moreover, the positions of pulse generated during this process are equally distributed in the periodic stress from 0º to 360° with a characteristic sequence of pulse. The phase interval, i.e. phase resolution Δ', is 2π divided by Np. Consequently, the phase resolution can be easily enhanced through an increase in the pulse amount Np by selection of fp, according to the characteristic equation. Finally, space charge behaviours in low-density polyethylene under 50 Hz AC stress were measured with three different pulse frequencies fp, i.e. 25.5, 1010 and 1001 Hz, to validate the proposed AEPS principle. Results show that the space charge distribution can be successfully acquired with a phase resolution from 7.07° to 0.36°, even if the pulse frequency is lower than the AC frequency at 25.5 Hz. This result indicates that AEPS can overcome the frequency limitation of the pulse generator, and a high phase resolution can be realised.
1820-1828
Wu, Jiandong
edc6e0a4-ace1-4914-b6b8-dee06be5137d
Wan, Jiadong
53d0ef98-0270-4523-b383-7be9799a3f24
Yin, Yi
38ba3cb5-e2ff-4a4e-9087-d97c9439ff64
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wu, Jiandong
edc6e0a4-ace1-4914-b6b8-dee06be5137d
Wan, Jiadong
53d0ef98-0270-4523-b383-7be9799a3f24
Yin, Yi
38ba3cb5-e2ff-4a4e-9087-d97c9439ff64
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Wu, Jiandong, Wan, Jiadong, Yin, Yi and Chen, George (2016) Automatic equal phase shift principle for space charge measurement under periodic stress of arbitrary waveform. IEEE Transactions on Dielectrics & Electrical Insulation, 23 (3), 1820-1828. (doi:10.1109/TDEI.2016.005684).

Record type: Article

Abstract

An automatic equal phase shift principle (AEPS) is proposed to simplify space charge detection under periodic stress with the pulsed electroacoustic method. For pulse frequency, fp is a non-integral multiple with periodic stress frequency fa; the detecting phase can be automatically shifted with a certain value after each cycle of periodic stress. The pulse position will be at the same phase of periodic stress after several cycles. The minimum amounts of periodic stress cycles and pulse generated during this process are defined as Na (>1) and Np, respectively. They can be uniquely confirmed by the characteristic equation Na/fa = Np/fp. Moreover, the positions of pulse generated during this process are equally distributed in the periodic stress from 0º to 360° with a characteristic sequence of pulse. The phase interval, i.e. phase resolution Δ', is 2π divided by Np. Consequently, the phase resolution can be easily enhanced through an increase in the pulse amount Np by selection of fp, according to the characteristic equation. Finally, space charge behaviours in low-density polyethylene under 50 Hz AC stress were measured with three different pulse frequencies fp, i.e. 25.5, 1010 and 1001 Hz, to validate the proposed AEPS principle. Results show that the space charge distribution can be successfully acquired with a phase resolution from 7.07° to 0.36°, even if the pulse frequency is lower than the AC frequency at 25.5 Hz. This result indicates that AEPS can overcome the frequency limitation of the pulse generator, and a high phase resolution can be realised.

Text
TDEI_6_1.pdf - Version of Record
Restricted to Repository staff only
Request a copy

More information

Accepted/In Press date: 29 January 2016
Published date: June 2016
Organisations: EEE

Identifiers

Local EPrints ID: 402999
URI: http://eprints.soton.ac.uk/id/eprint/402999
PURE UUID: d1ea5795-8abb-4cf3-9fb0-11a571fbe08b

Catalogue record

Date deposited: 21 Nov 2016 15:03
Last modified: 09 Dec 2019 19:22

Export record

Altmetrics

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.

×