HVDC cable design and space charge accumulation. Part 3: Effect of temperature gradient

被引：145

作者：

Fabiani, D. ^{[1
]}

Montanari, G. C. ^{[1
]}

Laurent, C. ^{[2
]}

Tayssedre, G. ^{[2
]}

Morshuis, P. H. F. ^{[3
]}

Bodega, R. ^{[4
]}

Dissado, L. A. ^{[5
]}

机构：

[1] Univ Bologna, DIE, Dept Elect Engn, I-40136 Bologna, Italy

[2] Univ Toulouse 3, Lab Genie Elect, F-31062 Toulouse, France

[3] Delft Univ Technol, NL-2628 CD Delft, Netherlands

[4] Prysmian Cables & Syst, Delft, Netherlands

[5] Univ Leicester, Dept Engn, Leicester LE1 7RH, Leics, England

来源：

IEEE ELECTRICAL INSULATION MAGAZINE | 2008年 / 24卷 / 02期

关键词：

temperature gradient; space charge; homocharge; heterocharge; conductivity; field inversion;

D O I：

10.1109/MEI.2008.4473049

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：

An investigation was conducted on the extent of space charge accumulation due to a temperature gradient in comparison with other charge-supply mechanisms, especially injection from the electrodes. In order to realize the feat, space-charge measurements were conducted out on HVDC cable models under application of different temperature gradients across the cable insulation, above and close to the threshold field for space-charge accumulation. Results show that in space charge generation in HVDC cable models at low fields, nonuniform conductivity due to a temperature gradient can play a role, not too far from the threshold for space-charge accumulation in samples with a uniform geometric field, especially if cable insulation thickness is huge. In addition, blocking and injection of charge at the electrodes may prevail over bulk charge accumulation produced by a temperature gradient, if the electric field is considerably larger than the threshold.

引用

页码：5 / 14

页数：10

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