增强输电线路各元件的协调性，可以提高其载流能力。介绍了电缆载流能力的计算方法，分析了计算过程中几项关键参数的取值过程。根据典型敷设条件下220 kV电缆载流量的计算，提出了输电线路架空线与电缆的导体截面匹配方案。

Enhance the coordination of components, the current carrying capacity of transmission lines could be increased. This paper introduced the calculation methods of current carrying capacity for power cable lines, and analyzed the key parameters during calculation. Based on the calculation results of current carrying capacity for 220 kV power cable lines under representative laying modes, some suggestions were proposed for the matching scheme of conductors cross-section between 220 kV overhead lines and cable lines.