基于非均匀排布的双回电缆线路温度分布特性研究

摘要

The temperature distribution has a significant effect on the comprehensive life of power cables.This paper studies the temperature distribution characteristics of YJLW03-64/110kV-400mm2 and YJLW03-64/110 kV-630 mm2 cable schemes.Firstly,the coupling model of electromagnetic field and temperature field of cable is established by ANSYS;and the temperature distribution law of equal-spacing equal-section cable is analyzed.Furthermore,the distribution law of cable temperature distribution with equal spacing and unequal spacing under unequal load and different cross-section conditions is analyzed and compared.The results show that the maximum temperature rise of the cable is obviously lower than that of the uniform arrangement when the cable is unevenly distributed.In this example,the maximum temperature of the cable is reduced from 55.6℃ to 54.3℃;the reduction ratio is 4.2％.Nonuniform arrangement of the cable temperature distribution under the optimization of the design and selection of cable lines has a certain significance.%温度分布对电力电缆的综合寿命影响显著,为此本文根据实际工程对YJLW03-64/110kV400mm2和YJLW03-64/110kV-630mm2组合电缆方案的温度分布特性进行研究.首先,采用ANSYS软件建立电缆电磁场-温度场耦合模型,分析了等间距等截面等荷载电缆温度分布规律;进一步地,对比分析了不等载荷不同截面条件下的等间距和不等间距排布的电缆温度分布规律.结果显示:电缆非均匀排布不等载荷时,其最高温升相较于均匀排布时有明显的下降,本实例中电缆最高温从55.6℃降低至54.3℃,降低比例为4.2％.非均匀排布方式下优化电缆温度分布,对电缆线路的设计和选型具有一定指导意义.