华南理工大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (4): 91-97.doi: 10.3969/j.issn.1000-565X.2018.04.013

• 能源、动力与电气工程 • 上一篇    下一篇

高压架空导线的电流分布计算与载流量分析

刘刚 郭德明 李炀 王亦清 陈垣   

  1. 华南理工大学 电力学院,广东 广州 510640
  • 收稿日期:2016-08-18 修回日期:2017-10-27 出版日期:2018-04-25 发布日期:2018-03-01
  • 通信作者: 刘刚( 1969-) ,男,博士,副教授,主要从事电气设备在线监测与故障诊断、过电压及其防护、电力设备外绝缘技术 研究 E-mail:liugang@scut.edu.cn
  • 作者简介:刘刚( 1969-) ,男,博士,副教授,主要从事电气设备在线监测与故障诊断、过电压及其防护、电力设备外绝缘技术 研究
  • 基金资助:
    国家高技术研究发展计划( 863 计划) 项目( 2015AA050201) 

Calculation of Current Distribution and Analysis of Current Carrying Capacity for Overhead Transmission Line
 

 LIU Gang GUO Deming LI Yang WANG Yiqing CHEN Yuan    

  1.  School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-08-18 Revised:2017-10-27 Online:2018-04-25 Published:2018-03-01
  • Contact: 刘刚( 1969-) ,男,博士,副教授,主要从事电气设备在线监测与故障诊断、过电压及其防护、电力设备外绝缘技术 研究 E-mail:liugang@scut.edu.cn
  • About author:刘刚( 1969-) ,男,博士,副教授,主要从事电气设备在线监测与故障诊断、过电压及其防护、电力设备外绝缘技术 研究
  • Supported by:
     Supported by the National High-Tech R&D Program of China( 863 Program) ( 2015AA050201)

摘要: 为准确计算架空导线径向截面温度分布,需要确定交流场中导线的各层电流分 布规律. 文中根据钢芯铝绞线的结构特点,以及复合导体磁链之间的耦合规律,推导了架 空导线内部各层导体的自感系数和互感系数,并求得流过每层导体的电流相量值,同时与 数值计算结果进行对比,所得平均误差仅为 3. 56%. 将计算的导体产热率施加到有限元 模型来计算截面温度分布,并通过实验验证了所述方法的准确性. 在此基础上分析了径向 温度分布对载流量计算的影响,发现导体最高允许运行温度的位置结构不同时,可提高的 载流量会有差异,对于线路增容具有借鉴意义. 

关键词: 钢芯铝绞线, 电流分布, 温度分布, 载流量 

Abstract: In order to calculate the radial temperature distribution of overhead transmission lines accurately,it is necessary to determine the current distribution firstly in alternating field. In this paper,the self-inductance and mutual inductance of the conductor in the overhead conductor WERE deduced,and the current phasor value of each conductor was obtained on the basis of the structural characteristics of ACSR ( Aluminium Conductor Steel Reinforced) and the coupling law between composite conductor fluxes. The average error we got was 3. 56% in comparison with numeraicl results. To get the cross-section temperature,we put heat generation rate on the finite element model. The accuracy of the method was verified by strict experiments in accordance with which the influence of the radial temperature distribution on the calculation of the current carrying capacity was analyzed,which provided a reference for dynamic rating of overhead lines. 

Key words: aluminium conductor steel reinforced, current distribution, temperature distribution, current rating

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