110kV电缆排管敷设下载流量变化规律研究

The Variation of the Current Carrying Capacity of the 110kV Cable Laid in Pipes

电缆载流量是关系到电缆安全运行的重要影响因子。针对排管敷设的110 kV电缆,采用有限元软件进行电力电缆温度场分析计算,确定电缆载流量,并在此基础上研究了110 kV电缆载流量随地表温度的变化规律。计算结果表明,地表温度是影响载流量最重要的因素,且电缆载流量随地表温度增加而线性下降。

The current carrying capacity of power cable is one of important factors for the security of the power cables. In this study, the temperature field of the 110 kV cables laid in pipes have computed by finite element software, based on the computed results, the current carrying capacity was confirmed, and the variation of the current carrying capacity of the 110 kV cable laid in pipes with the ground surface temperature was studied. The results showed that the ground surface temperature was the most important factor for the cable current carrying capacity, and it decreases linearly with the increase of ground surface temperature.