Open AccessAnalysis of Electrothermal Characteristics of Conductive Concrete Foundation of Power Tower
Author(s) -
Xu Tian,
Feng Pei,
Xin Liu,
Lulu Jia,
Chao Deng,
Fen Lan,
Hongbo Cheng
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/571/1/012057
Subject(s) - ground , electrical conductor , multiphysics , lightning strike , foundation (evidence) , electric power transmission , electrical engineering , transmission line , engineering , structural engineering , materials science , finite element method , archaeology , history
Conductive concrete has a good application prospect in transmission line tower grounding. The electrothermal effect and thermal stress distribution under lightning current impulse have an important influence on the design, application and maintenance of conductive concrete foundations. Based on the principle of thermoelectric coupling, the lightning current impulse model of conductive concrete foundation under electric-thermal-mechanical coupling is established by using COMSOL Multiphysics. The electric potential distribution, heat distribution and thermal stress distribution of the conductive concrete foundation are simulated and analyzed, and compared with conventional transmission line tower foundation. The simulation results show the conductive concrete foundation, as a natural grounding body, has a better grounding dispersion effect when it is impacted by lightning current, the internal temperature is lower, the thermal stress is smaller, and it has better electrothermal characteristics, which is more suitable for the field of power system grounding engineering without laying grounding body.