[1]张猛,梁任,赵桂峰.架空导线径向温差及允许载流量研究[J].郑州大学学报(工学版),2020,41(01):1-7.
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架空导线径向温差及允许载流量研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41
期数:
2020年01期
页码:
1-7
栏目:
出版日期:
2020-03-10

文章信息/Info

Title:
Study on Radial Temperature Distribution and Current-carrying Capacity of Overhead Conductors
作者:
张猛梁任赵桂峰
郑州大学 土木工程学院
关键词:
架空导线径向温差 敏感性分析允许温度允许载流量
Keywords:
overhead conductorsradial temperature differencesensitivity analysis allowable temperature allowable ampacity
文献标志码:
A
摘要:
以常用的LGJ300/50钢芯铝绞线为例,基于稳态热平衡方程和IEEE Std 738-2012 标准,考虑线股空气间隙和实际接触情况,利用 ANSYS 建立了精细化导线模型,对其径向温差及考虑径向温差时的允许载流量进行了分析。 结果表明:导线运行时存在内部高、表面低的径向温度场,温差可达4~10 ℃ ;导线温度对风速 0~3m/s、风向角 0~45°以及导线直径(型号)较为敏感;径向温差对导线允许载 流量的影响可达10%以上。考虑径向温差时,导线允许温度限值的定义对其允许载流量影响较大,建议将规范规定的导线允许工作温度理解为导线的平均温度。
Abstract:
Accurate understanding of the temperature distribution pattern of overhead conductor cross section can effectively predict the maximum ampacity of current line, and provide basis for real-time dynamic capacity-increase.This paper taking the commonly used conductor LGJ300/50 and LGJ400/35 as examples, based on the conductor steady-state heat balance equation and the IEEE 738-2012 standard, considering the air gap within the conductor and the actual contact between the strands, using the ANSYS software, the radial temperature distribution of overhead conductors and the influence of radial temperature difference on the allowable current carrying capacity of conductors are analyzed. The results show that there is a temperature field along the radial direction when the conductor is running. The temperature difference can reach 4℃~10 ℃, and it has a great influence on the allowable ampacity of the conductor.The definition of allowable temperature limit of conductor has a great influence on the allowable ampacity of the conductor. It is suggested that the allowable temperature limit shall be understood as the average temperature of the conductor.
更新日期/Last Update: 2020-02-22