架空输电线路载流量计算方法的比较

Comparison of Calculation of Conductor Current Carrying Ampacity on Overhead Transmission Line

介绍了目前国际上计算架空输电线载流量的摩根公式和架空输电线载流量计算IEEE标准的方法,由于这两种算法所考虑的影响因素有所不同,所以计算结果也不同。比较了影响架空输电线载流量的各种因素,在变化时采用不同算式所计算的载流量发现:在风速影响下,载流量的最大差异为7%;在环境温度的影响下,载流量的最大差异为1%;在日照的影响下,载流量的最大差异为1%。可见,在计算架空输电线载流量时,不管是采用摩根公式还是采用架空输电线载流量计算IEEE标准的算法,计算误差最大为7%,因此可以说这两个算法基本上可以通用。

This article introduces two internationally commonly used methods of overhead line ampacity calcula- tion, that is, Morgan Formulas and IEEE calculation. The considered influencing factors of these two methods are different, thus the calculation results are also different. This article compares the ampaeity results which are calculated by different formulas while the influenced factors of ampacity vary： It is discovered that the max- imum discrepancy can reach 7 ~ under the influence of wind speed, 1 ~ under the influence of ambient temper- ature and 1 ~ under the influence of sunshine. So, the maximum error of the overhead line ampacity calculation is only 7 ~ when calculated by those two different formulas. Therefore, these two formulas can be applied uni- versally and interchangeably.