电缆群排管敷设形式下的分流运行优化方法

李秋芳; 周文俊; 田智; 程萌; 王航; 周承科

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.
Li Qiu-fang,Zhou Wen-jun,Tian Zhi,Cheng Meng,Wang Hang,Zhou Chengke.Optimization of circuit current redistribution in a trench with multiple cable conduits to limit maximum temperature[J].Electrical Measurement & Instrumentation,2018,55(3):129-136.

电缆群排管敷设形式下的分流运行优化方法

Optimization of circuit current redistribution in a trench with multiple cable conduits to limit maximum temperature

DOI：

中文关键词: 排管敷设电缆群温度场优化方法有限元法

英文关键词:Cable laying Cable group Temperature field Optimization method Finite element method

基金项目:

作者中文名	作者英文名	单位
李秋芳	Li Qiu-fang	武汉大学电气工程学院
周文俊	Zhou Wen-jun	武汉大学电气工程学院
田智	Tian Zhi	国网湖北省电力公司武汉供电公司
程萌	Cheng Meng	国网湖北省电力公司武汉供电公司
王航	Wang Hang	武汉大学电气工程学院
周承科	Zhou Chengke	武汉大学电气工程学院

摘要点击次数: 1877

中文摘要:

夏季地下排管电缆聚集运行温度异常,电缆温度过高会加速电缆绝缘材料的老化,热量累积到一定程度,还可能引起起火事故。为降低地下排管中电缆运行温度,提出了电缆群排管敷设形式的优化方法。基于有限元法计算地下排管中电缆群运行温度场,建立了电缆群敷设形式优化计算模型。以电缆群中最高温电缆的温度降到最低为目标函数,电缆群中总载流量不变为约束条件,对电缆群中温度较高的电缆进行分流优化计算。通过Comsol Multiphysics软件仿真计算的结果可见,与未优化之前相比,采用优化方法后排管中最高温电缆的导体芯温度降低了约11%,电缆群最大温差降低了3.6℃,增加了电缆群温度场分布的均匀度,优化效果显著。

英文摘要:

The temperature of power cables in an underground cable conduit, which depend on ambient environment and operational current, can reach levels 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 increase 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°C, 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 optimisation 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.

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