输电线路增容改造工程导线选型的技术经济性分析

Analysis on the Technical Economy Characters of Conductor Selection for Transmission Line Reconstruction Projects

导线选型是输电线路增容改造中的一项重要内容,直接关系到工程的实施方案和各项指标。基于广东地区典型220 kV增容改造线路工程,选取了6种常规及新型导线作为改造比选方案,从载流量、机械荷载、弧垂特性、线损情况、一次性投资、等年值费用以及市场价格波动影响等7个方面进行了详细的技术经济性研究,并给出了最优方案和建议。

Conductor selection is an important assignment for the reconstruction of the transmission line capacity increasing, which di- rectly affects implement scheme and indexes of the project. Based on the typical 220 kV transmission line in Guangdong province, six different conventional and new type of conductor is selected as comparison scheme for reconstruction. Then, a detailed technical econ- omy research including current capacity, mechanical load, sag character, line losses, one-time investment, equivalent annual value and fluctuation of market price is carried out in this paper. Finally, the optimum scheme and suggestions is proposed. The conclusion and method is valuable to actual project.