Variation law of temperature field of a type of overhead conductor in the summer operating environment in Xining
The special and changeable climatic conditions in the plateau cold area result in signifi-cant variations in the temperature field of overhead conductors,which directly impact thermal defor mation and layered stress of strands,ultimately leading to fatigue fractures.Therefore,it is crucial to conduct research on the temperature field variations of overhead conductors in the operating environ-ment of plateau cold area.Based on the two-dimensional steady-state thermal equilibrium gover-ning equation,a numerical method for solving the radial temperature field of overhead conductors is established by considering the contact structure and porosity between steel and aluminum strands.The method is applied to the JL/G1A-630/55-48/7 steel core aluminum stranded wire to investi-gate its radial temperature distribution and temperature field variation in different environments.The results show that there is a radial temperature difference in the conductor which cannot be ignored.Wind speed,light intensity and ambient temperature have significant influence on the temperature field of overhead conductors.
overhead conductorradial temperature fieldtwo-dimensional steady-state thermal equilibriumfinite element methodnumerical simulation
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