电测与仪表2018，Vol.55Issue(3)：129-136,8.
电缆群排管敷设形式下的分流运行优化方法
Optimization method of circuit current redistribution in a trench with multiple cable conduits to limit maximum temperature
李秋芳 1周文俊 1田智 2程萌 2王航 1周承科1
作者信息
- 1. 武汉大学电气工程学院,武汉430072
- 2. 国网湖北省电力公司武汉供电公司,武汉430072
- 折叠
摘要
Abstract
The temperature of power cables in an underground cable conduit,which depends on ambient environment and operational current,can reach levds in excess of the maximum allowed values in summer.Over temperature due to accumulation of heat accelerates the aging of power cable insulation materials,and increases risk of fire accident.In order to limit the operating temperature of cables in an underground cable conduit,an optimization method is proposed in this paper to reallocate the current ratings of the multiple cable circuits in a cable conduit.Based on the finite element method,the temperature field in an underground conduit which houses a group of cables is calculated.An optimization model of reallocating the current in the cable group is established.On the basis that the temperature of the highest temperature cable in the cable group should never be allowed to exceed 90 ℃,and achieves a minimum and that the total current of all the cables in the conduit should remain unchanged,the cable with the highest temperature in the cable group is optimized by distributing its current.It is found from results of simulation by Comsol Multiphysics that,compared with before the results of not adopting the proposed optimization method,the conductor core temperature of cable with the highest temperature in the conduit is reduced by almost 11％ and the maximum temperature difference of among the cables in the conduit is reduced by 3.6 degrees,meaning that the uniformity of temperature field distribution of the cable group is increased after using the optimization method.关键词
排管敷设/电缆群/温度场/优化方法/有限元法Key words
cable laying/cable group/temperature field/optimization method/finite element method分类
信息技术与安全科学引用本文复制引用
李秋芳,周文俊,田智,程萌,王航,周承科..电缆群排管敷设形式下的分流运行优化方法[J].电测与仪表,2018,55(3):129-136,8.
