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Space charge behaviours in polyethylene under combined AC and DC electric fields

Space charge behaviours in polyethylene under combined AC and DC electric fields
Space charge behaviours in polyethylene under combined AC and DC electric fields
Polyethylene has been one of the widely studied polymeric insulation materials. One of the major issues related to polymeric materials is the easy formation of space charge which may cause electric field enhancement. In this paper, a numerical simulation based on a bipolar charge injection/transport model is used to obtain characteristics of space charge in polyethylene under the combined AC and DC high voltage at room temperature. The bipolar charge injection/transport model, which is widely used in HVDC space charge simulation, is applied in this combined condition. The overall applied voltage, consisted of root mean square (RMS) values of 50 Hz AC voltage and DC voltage, is kept the same, while the DC component has been varied from 0 to 1. The simulated charge distributions present notable differences when DC offset is added compared with pure AC conditions. Besides, these differences become more significant when the offset ratio is increased. The total positive and negative charge amounts are calculated respectively by integrating the charge in the material, and a curve of net charge amount changing along with time is obtained
978-1-4799-7525-9
1-4
Zhou, Churui
c790215c-c3e7-4398-bb05-c4f9fc27558f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhou, Churui
c790215c-c3e7-4398-bb05-c4f9fc27558f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Zhou, Churui and Chen, George (2014) Space charge behaviours in polyethylene under combined AC and DC electric fields. 2014 Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Des Moines, United States. 18 - 21 Oct 2014. pp. 1-4 .

Record type: Conference or Workshop Item (Paper)

Abstract

Polyethylene has been one of the widely studied polymeric insulation materials. One of the major issues related to polymeric materials is the easy formation of space charge which may cause electric field enhancement. In this paper, a numerical simulation based on a bipolar charge injection/transport model is used to obtain characteristics of space charge in polyethylene under the combined AC and DC high voltage at room temperature. The bipolar charge injection/transport model, which is widely used in HVDC space charge simulation, is applied in this combined condition. The overall applied voltage, consisted of root mean square (RMS) values of 50 Hz AC voltage and DC voltage, is kept the same, while the DC component has been varied from 0 to 1. The simulated charge distributions present notable differences when DC offset is added compared with pure AC conditions. Besides, these differences become more significant when the offset ratio is increased. The total positive and negative charge amounts are calculated respectively by integrating the charge in the material, and a curve of net charge amount changing along with time is obtained

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Published date: 20 October 2014
Venue - Dates: 2014 Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Des Moines, United States, 2014-10-18 - 2014-10-21
Organisations: EEE

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Local EPrints ID: 373701
URI: http://eprints.soton.ac.uk/id/eprint/373701
ISBN: 978-1-4799-7525-9
PURE UUID: 74a40070-c050-496d-a7f6-b3372efb695b

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Date deposited: 02 Feb 2015 10:09
Last modified: 01 May 2020 16:33

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