Study on Radial Temperature Distribution and Current-carrying Capacity of Overhead Conductors
[1]Zhang Meng,Liang Ren,Zhao Guifeng.Study on Radial Temperature Distribution and Current-carrying Capacity of Overhead Conductors[J].Journal of Zhengzhou University (Engineering Science),2020,41(01):1-7.[doi:10.13705/j.issn.1671-6833.2020.01.021]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 01
Page number:
1-7
Column:
Public date:
2020-03-10
- Title:
- Study on Radial Temperature Distribution and Current-carrying Capacity of Overhead Conductors
- Keywords:
- overhead conductors; radial temperature difference; sensitivity analysis allowable temperature ; allowable ampacity
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2020.01.021
- 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.
- References:
- -
- Similar References:
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Last Update:
2020-02-22