Research on transmission line design method based on life cycle cost theory

In order to improve the quality of life-cycle-cost of the transmission line system, this paper introduces the basic theory of the life-cycle-cost, analyse the construction of the lifecycle-cost of transmission line. Then two main parameters, the design life of transmission line and project fund discount rate, will be researched detailedly. At last, by giving the life-cycle-cost prediction model for those main parts of transmission line and providing the life-cycle-cost calculation model of transmission line, this paper proposes a design method for transmission line based on life-cycle-cost theory. The feasibility and effectivity of this design method for the transmission line could be proved by an example.