In order to fully grasp the reliability of the overhead transmission line system

we studied the design method of overhead transmission line system based on strength matching theory after comprehensively considering the safety level

the construction cost

damage repair time and cost of each component of current transmission lines in China. Moreover

we proposed five failure sequences for each component

a design method for strength match of the transmission line system and the matching coefficients. The comparative analysis of the method in this paper with the current design method in China shows that most of the components can be kept in line with the current standard level of the reliability. The design method for strength match can realize the differentiated matching design for different overhead transmission line systems.