The University of Southampton
University of Southampton Institutional Repository

Numerical Modelling of Needle-Grid Electrodes Negative Surface Corona Charge System

Numerical Modelling of Needle-Grid Electrodes Negative Surface Corona Charge System
Numerical Modelling of Needle-Grid Electrodes Negative Surface Corona Charge System
Surface potential decay measurement is a simple and low cost tool to examine electrical properties of insulation materials. During corona charging stage, needle-grid electrodes system is often used to achieve uniform charge distribution on the surface of the sample. However, there is little report on the effects of geometrical parameters and voltage values of the charging system on the surface potential and its characteristics. In the present report simulations based on gas discharging physics similar to [1] have been carried out to investigate dynamic surface charge formation. The geometry of in the model includes a 174?m radius of curvature needle setting perpendicular to a 0.5mm thickness grid electrode and a 27.5mm diameter with 50?m thickness polyethylene. The bottom surface of the polyethylene is grounded and it is 3cm and 1.5cm away from the needle electrode and grid electrode respectively. The simulations were initially performed under the following conditions: the needle electrode was set as -8000V and the grid electrode -2000V. It has been found that an impulse current appeared after 0.3?s charging which represented the corona effect. The effect of adding a grid electrode can be clearly seen from the logarithmic plot of electrons. Finally, surface charge density on the sample has been obtained.
72
Zhuang, Y
7ad37619-d28d-4486-b985-c2646cf4faf6
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Rotaru, M
c53c5038-2fed-4ace-8fad-9f95d4c95b7e
Zhuang, Y
7ad37619-d28d-4486-b985-c2646cf4faf6
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Rotaru, M
c53c5038-2fed-4ace-8fad-9f95d4c95b7e

(2011) Numerical Modelling of Needle-Grid Electrodes Negative Surface Corona Charge System. UHVnet 2011, United Kingdom. 18 - 19 Jan 2011. p. 72 .

Record type: Conference or Workshop Item (Poster)

Abstract

Surface potential decay measurement is a simple and low cost tool to examine electrical properties of insulation materials. During corona charging stage, needle-grid electrodes system is often used to achieve uniform charge distribution on the surface of the sample. However, there is little report on the effects of geometrical parameters and voltage values of the charging system on the surface potential and its characteristics. In the present report simulations based on gas discharging physics similar to [1] have been carried out to investigate dynamic surface charge formation. The geometry of in the model includes a 174?m radius of curvature needle setting perpendicular to a 0.5mm thickness grid electrode and a 27.5mm diameter with 50?m thickness polyethylene. The bottom surface of the polyethylene is grounded and it is 3cm and 1.5cm away from the needle electrode and grid electrode respectively. The simulations were initially performed under the following conditions: the needle electrode was set as -8000V and the grid electrode -2000V. It has been found that an impulse current appeared after 0.3?s charging which represented the corona effect. The effect of adding a grid electrode can be clearly seen from the logarithmic plot of electrons. Finally, surface charge density on the sample has been obtained.

PDF
Yuan_Zhang_Paper_009.pdf - Version of Record
Download (143kB)
Other
Yuan_-_UHVnet_Poster_--_yz205.pptx - Other
Download (3MB)

More information

Published date: 18 January 2011
Additional Information: Event Dates: 18-19 January 2011
Venue - Dates: UHVnet 2011, United Kingdom, 2011-01-18 - 2011-01-19
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 271890
URI: http://eprints.soton.ac.uk/id/eprint/271890
PURE UUID: 4580315a-aa52-4edd-9292-ded022959573

Catalogue record

Date deposited: 09 Jan 2011 08:48
Last modified: 18 Jul 2017 06:37

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.

×