高压架空输电线路经济运行参数的研究

Research on the Economical Operating Parameters of High-voltage Overhead Transmission Lines

在架空输电线路总损耗的基础上,用数学极值方法推导出了考虑电压变化影响时架空输电线路经济负荷功率的计算公式,并得出当架空输电线路按经济功率Sj=((G/R)～(1/2))U2运行时,其输电效率最高ηmax=1-2((GR)～(1/2))/cosφ,线路的损耗最小的结论。

On the basic of total consumption of overhead electric power transmission line, using mathematical method of extremum, a computational formula considered the impact of voltage changing of overhead transmission line economic load power was deduced.And a conclusion is drawn that when overhead transmission line operates according to the economic load power（Sf=√G/R·U^2）, its power transmission cfficiency is the highest（ηmax=1-2√GR/cosφ） and the line loss is the minimum.