Vol. 62 | no. 3 | July - September 2014 Article 5

Change of Dielectric Parameters of XLPE Cable due to Thermal Aging
(full text in English)

Martin GERMAN-SOBEK, Roman CIMBALA, Jozef KIRÁLY
Abstract
The change of dielectric parameters points to the aging or defect of HV equipment insulation. Cross-linked polyethylene (XLPE) is the globally preferred modern insulation for power cables, both for distribution and transmission system applications. Many studies and experiments show an influence of aging to degradation of XLPE insulation. It is subsequently reflected by changing of dielectric parameters of insulation. The measurement of dielectric parameters of XLPE cable sample was carried out by the method of dielectric relaxation spectroscopy (DRS) in frequency domain. DRS represents method suitable for measuring the dielectric parameters of polymeric composites during aging. The results are compared and it was observed a change of parameters in consequence of additional aging.
Keywords: insulation, XLPE cable, aging of XLPE, capacitance, dissipation factor, thermal aging, dielectric relaxation spectroscopy

 

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