关于架空输电线路载流量计算方法的分析及改进

Analysis and Improvement of Calculation Method for Current Carrying Capacity of Overhead Transmission Lines

摘要:

为了解决架空输电线路载流量计算方法与实际环境存在偏差的问题，通过对目前输电线载流量计算方法的 分析，建立了与输电线所处实际环境一致的辐射散热计算方法，并在此基础上修正了架空输电线载流量的计算公式。 研究结果表明，目前基于 Morgan 公式的载流量计算公式在计算架空输电线的载流量时过于保守，环境温度的降低和 风速的提高可以使输电线载流量显著提高。

Abstract:

In order to solve the problem of deviation between the calculation method of the current － carrying capacity of overhead transmission lines and the actual environment，a calculation method of radiation heat dissipation consistent with the actual environment of transmission line is established by analyzing the calculation method of the current transmission line flow rate． On this basis，the calculation formula for the current carrying capacity of overhead transmission lines are corrected． The research results show that the current formula based on Morgan formula is very conservative when calculating the current － carrying capacity of overhead transmission lines，and the reduction of ambient temperature and the increase of wind speed can significantly increase the current carrying capacity of transmission lines．