Space charge evolution in XLPE with long-term aging under DC voltage - the effect of temperature and polarity reversals

被引：4
|
作者：
Abou-Dakka, M. [1 ]
Bulinski, A. T. [1 ]
Bamji, S. S. [1 ]
机构：
[1] Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, Canada
来源：
2006 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA | 2006年
关键词：
D O I：
10.1109/CEIDP.2006.311988
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
DC field long-term breakdown characteristics of commercially available cable-grade cross-linked polyethylene (XLPE) and tree retardant XLPE (TR-XLPE) were investigated. At room temperature, under a unipolar field of 50 kV/mm, more than 90% of XLPE specimens survived 52,000 h (similar to 6 yrs) of aging, whereas all TR-XLPE specimens broke down within less than 1,200 h. Reversing the polarity increased the life-time of TR-XLPE by more than 20 times but reduced significantly the life-time of the XLPE specimens. At 75 degrees C and with polarity reversals both materials survived almost 2 1,000 h without any breakdown. These results are discussed in terms of the space charge accumulation and retention properties of the two materials with emphasis on the role of additives in determining insulation proper-ties under dc fields.
引用
收藏
页码：537 / 540
页数：4
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