Transmission cables

which are not affected by natural conditions and good for urban aesthetics

high transmission safety and low maintenance cost

etc.

have gradually become rhe preferred alternative to urban overhead lines. However

traditional planning only considers the initial cost of the cable while selecting cables

less work have taken the cost of ventilation and heat dissipation during the cable operation into account. Aming at this lack of study

the selection method of transmission cable considering the annual investment operation cost is proposed

which is of great significance to reduce the comprehensive cost of cable engineering.