Effect of the Formation of the Dry Zone Around Underground Power Cables on Their Ratings

被引：60
|
作者：
Gouda, Ossama E. [1 ]
El Dein, Adel Z. [2 ]
Amer, Ghada M. [3 ]
机构：
[1] Cairo Univ, Dept Elect Engn, High Voltage Grp, Cairo, Egypt
[2] S Valley Univ, High Inst Energy, Dept Elect Engn, Aswan 81528, Egypt
[3] Benha Univ, High Inst Technol, Dept Elect Engn, Banha, Egypt
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2011年 / 26卷 / 02期
关键词：
Cable ampacity; de-rating factor; dry zone; temperature distribution; INTERNAL THERMAL-RESISTANCE; AMPACITY; SOIL; TEMPERATURE; CURRENTS; FILLERS; HEAT;
D O I：
10.1109/TPWRD.2010.2060369
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：
Many factors affect the loading of the underground power cables, such as ambient temperature, depth of laying of cable, number of parallel circuits of cable, and thermal resistivity of the surrounding soil. One important factor, usually ignored, is the formation of dry zones around the underground power cables. Dry zones are usually formed around underground power cables under loading conditions due to the migration of moisture within the soil. In this paper, the effect of the formation of the dry zone on the ampacity of underground power cables is investigated. The derating factor for the formation of dry zones around underground power cables is suggested and calculated for different types of natural backfill soil. IEC 60287-1-3 is taken as a reference. Experimental work was conducted to study the phenomena of the dry zone as related to different types of soils.
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页码：972 / 978
页数：7
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