NDLI: A model for bipolar charge transport in insulators

Content Provider	IEEE Xplore Digital Library
Author	Alison, J.M. Hill, R.M.
Copyright Year	1995
Description	Author affiliation: Dept. of Phys., King's Coll., London, UK (Alison, J.M.; Hill, R.M.)
Abstract	Failure of electrical cable insulation is still a major problem for the electricity generation and supply industries. Under high field conditions (>10/sup 8/ Vm/sup -1/), space charge and the concomitant electric field dynamics are involved in the initiation of dielectric breakdown. Space charge is established either by charge transferred across electrode-insulator interfaces, or by field assisted ionisation of centres within the bulk of the dielectric. The action of high fields upon charge provides mechanisms by which electrical energy is transformed into potentially destructive mechanical energy. Measurements of the dynamic space charge distribution within plane parallel samples of insulators contained between aluminium electrodes under high voltage DC stress have been previously obtained using a pulsed electro-acoustic (PEA) apparatus. The pulsed electro-acoustic technique has been developed to provide a high resolution and reliable method of measuring the space charge density dynamics within insulators. It is a flexible alternative to the pressure wave propagation method. In this paper, experimental data for space charge dynamics within degassed cross-linked polyethylene (XLPE) is compared to a simple numerical simulation, which has been derived from concepts first utilised in semiconductor physics.
Starting Page	319
Ending Page	323
File Size	254506
Page Count	5
File Format	PDF
ISBN	0780320409
DOI	10.1109/ICSD.1995.523001
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-07-10
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space charge Pulse measurements Dielectrics and electrical insulation Current measurement Charge measurement Pulsed electroacoustic methods Cable insulation Power generation Electricity supply industry Virtual manufacturing
Content Type	Text
Resource Type	Article

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Measurement of space charge distribution in XLPE cable insulation at high temperature

Space charge and associated electroluminescence processes in XLPE cable peelings

Interfacial conditions and space charge in PE laminates

Input of optimization techniques for implementing charge transport models in electrical insulation

Space charge evolution in XLPE cable insulation under high electric fields

Measurement of space-charge distributions in insulators under very rapidly varying voltage

Mobility evaluation from space charge measurements performed by the pulsed electroacoustic technique

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Evaluation via PEA measurements of paper-oil insulation submitted to gamma radiation

A model for bipolar charge transport in insulators

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