NDLI: Space charge development and breakdown in XLPE under DC field

Content Provider	IEEE Xplore Digital Library
Author	Abou-Dakka, M. Bulinski, A. Bamji, S.
Copyright Year	2002
Description	Author affiliation: Nat. Res. Council of Canada, Ottawa, Ont., Canada (Abou-Dakka, M.; Bulinski, A.; Bamji, S.)
Abstract	The correlation between space charge accumulation and insulation failure has been investigated in four, polyethylene-based materials subjected to a dc field of 50 kV/mm. Two of the materials tested were equipped with tree-retardant additives. All four materials were aged for extended periods up to 16,000 h. Periodically, the specimens were removed from the external field and subjected to space charge density measurements under no-voltage conditions using the Thermal Step technique. Not a single parameter that would consistently correlate with times to insulation failure could be derived from the space charge measurements. However, the space charge measurements provided valuable insight into a possible link between the dynamics of space charge development and the time of dc aging. In particular, the measurements have shown a consistent surge in the amount of accumulated space charge shortly before insulation breakdown. This phenomenon could be used to screen new materials for dc voltage applications.
Sponsorship	IEEE Dielectrics & Electrical Insulation Soc. IEEE Ultrasonics & Frequency Control Soc
Starting Page	62
Ending Page	66
File Size	428969
Page Count	5
File Format	PDF
ISBN	0780375602
DOI	10.1109/ISE.2002.1042944
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-03
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space charge Electric breakdown Current measurement Charge measurement Aging Materials testing Trees - insulation Additives Density measurement Time measurement
Content Type	Text
Resource Type	Article

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