Measurement of charge distributions in insulating materials for high voltage cables

Evolutions in time of charge distributions in thick dielectric insulators such as those used in high-voltage DC insulation are investigated. The pressure wave propagation (PWP) method has been applied to low-density, high-density, and cross-linked polyethylene under electric stress. It is shown that...

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Bibliographic Details
Published inProceedings., Second International Conference on Properties and Applications of Dielectric Materials pp. 434 - 437 vol.2
Main Authors Alquie, C., Ditchi, T., Lewiner, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1988
Subjects
Charge measurement
Current measurement
Dielectric materials
Dielectric measurements
Dielectrics and electrical insulation
Electrodes
Impurities
Polyethylene
Space charge
Stress
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Summary:Evolutions in time of charge distributions in thick dielectric insulators such as those used in high-voltage DC insulation are investigated. The pressure wave propagation (PWP) method has been applied to low-density, high-density, and cross-linked polyethylene under electric stress. It is shown that the impurities contained in carbon-loaded polyethylene electrodes play a very significant role in the development of a space charge distribution within the insulator. It is suggested that, by studying the evolution of the charge distributions, it is possible to determine whether a stabilization occurs and how much time is required to reach this stabilization, depending on the temperature and the applied voltage. Consequently, such a measurement made on samples having the same structure as the cables will help in defining tests and standard procedures for equipment evaluation.< >
DOI:10.1109/ICPADM.1988.38427