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Space charge in polyethylene under combined AC and DC voltages

Space charge in polyethylene under combined AC and DC voltages
Space charge in polyethylene under combined AC and DC voltages
In contrast to extensive publication on the behavior of space charge in polymeric insulation materials subject to individual dc or ac voltages, space charge in the situation of composite voltages has not yet been reported. In this paper, the dynamics of space charge in polyethylene subjected to combined ac and dc voltages have been experimentally investigated using the pulsed electroacoustic technique. Results show that combined voltages could significantly enhance the space charge accumulation. The dc component voltage determines the charge accumulation in the bulk of polyethylene while ac component influences the charge density on the electrodes. The amount of charge in the bulk depends on the ratio between ac and dc voltage components. This result is important to understand the electrical performance of high voltage equipment where insulation may experience the combined ac and dc voltages.
space charge, polyethylene, combined ac and dc voltages
1757-1763
Zhao, Junwei
26a92db8-e8e8-4024-9631-9f5f55f7a88f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhong, Lisheng
255706e0-8092-4cac-a05b-94167a66729a
Zhao, Junwei
26a92db8-e8e8-4024-9631-9f5f55f7a88f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhong, Lisheng
255706e0-8092-4cac-a05b-94167a66729a

Zhao, Junwei, Chen, George and Zhong, Lisheng (2014) Space charge in polyethylene under combined AC and DC voltages. IEEE Transactions on Dielectrics & Electrical Insulation, 21 (4), 1757-1763. (doi:10.1109/TDEI.2014.004213).

Record type: Article

Abstract

In contrast to extensive publication on the behavior of space charge in polymeric insulation materials subject to individual dc or ac voltages, space charge in the situation of composite voltages has not yet been reported. In this paper, the dynamics of space charge in polyethylene subjected to combined ac and dc voltages have been experimentally investigated using the pulsed electroacoustic technique. Results show that combined voltages could significantly enhance the space charge accumulation. The dc component voltage determines the charge accumulation in the bulk of polyethylene while ac component influences the charge density on the electrodes. The amount of charge in the bulk depends on the ratio between ac and dc voltage components. This result is important to understand the electrical performance of high voltage equipment where insulation may experience the combined ac and dc voltages.

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Accepted/In Press date: 11 April 2014
Published date: August 2014
Keywords: space charge, polyethylene, combined ac and dc voltages
Organisations: EEE

Identifiers

Local EPrints ID: 368825
URI: http://eprints.soton.ac.uk/id/eprint/368825
PURE UUID: 35d8651d-207d-4f9e-92b6-a1958eb5811d

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Date deposited: 13 Sep 2014 09:54
Last modified: 25 Nov 2019 20:40

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