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Simultaneous Space Charge and Current Density Assessment in Additive-free LDPE under HVDC Condition

Simultaneous Space Charge and Current Density Assessment in Additive-free LDPE under HVDC Condition
Simultaneous Space Charge and Current Density Assessment in Additive-free LDPE under HVDC Condition
This paper presents the investigation into the electrical conduction properties of LDPE with electrode materials effect. Space charge and current measurement were monitored at two different applied electric fields. It was achieved using the Pulsed Electro-acoustic (PEA) technique on a newly constructed system, which is capable of quantifying space charge and current simultaneously in a planar sample. Tests were carried out with additive-free Low Density Polyethylene (LDPE) films under dc electric field at 30°C in a temperature-controlled environment. Aluminum (Al) and Semicon (Sc) were used for the electrode materials. The homocharges observed is alleged to be initiated from charge injection across the electrode/LDPE interfaces; this is ascribed to Schottky injection. Here, heterocharges spotted are developed when one of the electrodes partly blocks the extraction of charges injected by the other. The amount of charges injected into the bulk depends on the barrier height between the electrode/ LDPE interface, when the same material is exposed to different polarities, the barrier height also differ, therefore a contrasting feature of charges was exhibited.
Space charge, high field, electrode effect, polyethylene
7-900371-56-7
144-147
Lau, W. S.
7f9768ce-b4af-4e56-9ec4-31bfbafe99cb
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lau, W. S.
7f9768ce-b4af-4e56-9ec4-31bfbafe99cb
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Lau, W. S. and Chen, G (2003) Simultaneous Space Charge and Current Density Assessment in Additive-free LDPE under HVDC Condition. The 2nd International Conference on Insulation Condition Mornitoring of Electrical Plant, Chongqing, China. 27 - 30 Oct 2003. pp. 144-147 .

Record type: Conference or Workshop Item (Other)

Abstract

This paper presents the investigation into the electrical conduction properties of LDPE with electrode materials effect. Space charge and current measurement were monitored at two different applied electric fields. It was achieved using the Pulsed Electro-acoustic (PEA) technique on a newly constructed system, which is capable of quantifying space charge and current simultaneously in a planar sample. Tests were carried out with additive-free Low Density Polyethylene (LDPE) films under dc electric field at 30°C in a temperature-controlled environment. Aluminum (Al) and Semicon (Sc) were used for the electrode materials. The homocharges observed is alleged to be initiated from charge injection across the electrode/LDPE interfaces; this is ascribed to Schottky injection. Here, heterocharges spotted are developed when one of the electrodes partly blocks the extraction of charges injected by the other. The amount of charges injected into the bulk depends on the barrier height between the electrode/ LDPE interface, when the same material is exposed to different polarities, the barrier height also differ, therefore a contrasting feature of charges was exhibited.

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More information

Published date: 2003
Additional Information: Event Dates: October 27-30
Venue - Dates: The 2nd International Conference on Insulation Condition Mornitoring of Electrical Plant, Chongqing, China, 2003-10-27 - 2003-10-30
Keywords: Space charge, high field, electrode effect, polyethylene
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 258518
URI: http://eprints.soton.ac.uk/id/eprint/258518
ISBN: 7-900371-56-7
PURE UUID: a45717ff-bb1e-4b6a-9383-de4ef8c177df

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Date deposited: 10 Nov 2003
Last modified: 29 Jan 2020 15:32

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Contributors

Author: W. S. Lau
Author: G Chen

University divisions

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