LIMM study of space charge in crosslinked polyethylene

Electric field-space charge profiles obtained using the laser-intensity-modulation-method (LIMM) are presented for XLPE samples extracted from power cable insulation cross-linked using dicumyl peroxide. The samples, 110 /spl mu/m thick with vacuum-evaporated aluminium electrodes, were subjected to d...

Full description

Saved in:
Bibliographic Details
Published in2005 12th International Symposium on Electrets pp. 196 - 199
Main Authors Pawlowski, T., Fleming, R.J., Lang, S.B.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Aluminum
Annealing
Cable insulation
Cables
Electrodes
Polyethylene
Power lasers
Power transmission
Space charge
Spatial resolution
Online AccessGet full text

Cover

More Information
Summary:Electric field-space charge profiles obtained using the laser-intensity-modulation-method (LIMM) are presented for XLPE samples extracted from power cable insulation cross-linked using dicumyl peroxide. The samples, 110 /spl mu/m thick with vacuum-evaporated aluminium electrodes, were subjected to dc fields of 48 kV/mm and both polarities at room temperature for at least 24 hr. The LIMM measurements were made at room temperature, and at various times after the end of poling. Electric field and space charge profiles obtained using the scale-transformation and polynomial regularization methods were in fair quantitative agreement, except occasionally near the electrodes. Most of the space charge was concentrated near the electrodes, with densities of order 5-10 C m/sup -3/ in those regions. Charge of the same sign tended to accumulate adjacent to a given physical electrode, for both poling polarities.
ISBN:0780391160
9780780391161
ISSN:2153-3253
2153-327X
DOI:10.1109/ISE.2005.1612354