沿海配网新建线路中架空线和电缆间选择的经济性分析

Economic Analysis of Choice Between Overhead Line and Cable in Coastal New Distribution Network Line

为兼顾线路初期投资和后期运行成本,从全生命周期成本(LCC)角度出发,对沿海新建配网线路中架空线和电缆间的选择进行了经济性分析。构建了架空线和电缆的LCC模型,选取某10 k V配网新建线路为案例,对架空线和电缆的LCC进行计算和比较,结果发现在同等载流量条件下,架空线和电缆间的选择不能根据传统的仅比较初始投资的方法,而应更关注电缆在电能损耗成本上相对架空线的优势,架空线或电缆间的选择也应视拟建线路所处风区、成本电价和社会折现率等多因素而定,为沿海配网新建线路中架空线和电缆间的选择提供了理论依据。

In order to take into account the initial investment and the late running cost,this paper made an economic analysis of thechoice between the overhead line and the cable in the new distribution network line from the perspective of life cycle cost(LCC).This paperestablished the LCC models of overhead line and cable,and chose the case of a new10kV distribution network line to carry out calculationand comparison for LCC of overhead line and cable.The results show that under the condition of same ampacity,the choice betweenthe overhead line and the cable should not be based on the traditional method of comparing only the initial investment,but rather pay moreattention to the advantages of the overhead line in the cost of electric energy loss compared to the cable,and the final choice can’t be generalizedand many factors should be considered instead,such as the wind area where the proposed line is located,the cost of electricity andthe social discount rate,which provides a theoretical basis for the choice between the overhead line and the cable in coastal new distributionnetwork line.