Journal of South China University of Technology(Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (4): 91-97.doi: 10.3969/j.issn.1000-565X.2018.04.013

• Energy，Power & Electrical Engineering • Previous Articles     Next Articles

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)

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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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