Open AccessImproved calculation method of dynamic current carrying capacity of transmission line
Author(s) -
Ruopeng Zhang,
Mingxing Tian,
Lijun Sun,
Zhaoxu Su
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1920/1/012039
Subject(s) - ampacity , transmission line , environmental science , current (fluid) , electric power transmission , carrying capacity , dissipation , conductor , meteorology , computer science , electrical conductor , engineering , electrical engineering , telecommunications , materials science , physics , thermodynamics , ecology , composite material , biology
The calculation of the dynamic current carrying capacity of transmission lines in a domestic traction network is based on IEEE 738 standard. However, because IEEE 738 standard is derived under specific climate and geographical conditions, only when the climate and geographical conditions are stable can the accurate ampacity be calculated. However, in practical application, due to the rapid change of climate factors and large meteorological monitoring error, the results calculated by IEEE 738 standard have large errors. Therefore, this paper puts forward the method of using convective heat dissipation coefficient and equivalent radiation heat dissipation coefficient to deal with the problems caused by unstable meteorological factors. By this method, the dynamic current carrying capacity of the transmission line can be calculated only by measuring the conductor temperature and ambient temperature, which simplifies the calculation process of the dynamic current carrying capacity of the transmission line and reduces the dependence on meteorological parameters.