Study of breakdown factors of XLPE cables

被引：0
|
作者：
Katakai S. [1 ]
Murata Y. [1 ]
Yamazaki T. [1 ]
机构：
[1] Technology Development Department, Electric Wire and Cable Energy Business Unit, Sumitomo Electric Industries ltd., 5-1-1, Hitaka-cho, Hitachi
来源：
Katakai, Shoshi (katakai-shoshi@sei.co.jp) | 2018年 / Institute of Electrical Engineers of Japan卷 / 138期
关键词：
Breakdown; Defect; Peroxide decomposition products; Temperature dependence; Treeing; XLPE cable;
D O I：
10.1541/ieejfms.138.521
中图分类号：
学科分类号：
摘要：
Breakdown factors of XLPE cables are studied, using model cables and block XLPE samples. The influences of defects and peroxide decomposition products on breakdown strength and tree inception stress are evaluated. The breakdown strength of XLPE cables is greatly affected by the existence of defects. In addition, AC breakdown strength is increased by the effect of peroxide decomposition products, especially in cases where the size of the defects is small. The effect is caused by the concentration of decomposition products around defects due to dielectrophoresis, because decomposition products have high permittivity and low resistivity. Stress relaxation and an apparent increase of tip radius occurs. These effects are weakened at high temperature. © 2018 The Institute of Electrical Engineers of Japan.
引用
收藏
页码：521 / 530
页数：9
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