Influence of Various Biomass Smoldering Flue Gas on Physical Characteristics of High Voltage Transmission Line

Abstract

Through intelligent resistivity tester and universal tensile testing machine, the physical properties of steel-cored aluminum strand above smoldering biomass fuel were analyzed. The results show that compared with the original aluminum single wire, the resistivity of each aluminum single wire under each biomass smoldering condition increases, and the increase amplitude increases with the decrease of the height of the aluminum single wire. The height of the steel core aluminum strand has no obvious effect on the tensile strength before and after smoldering. When the height of the steel-cored aluminum strand from the combustible surface is 5 cm, the Young 's modulus of all aluminum single wires decreases, among which the Young 's modulus of aluminum single wires after smoldering Eucalyptus leaves and poplar sawdust decreases the most. When the height of the steel-cored aluminum strand from the fuel surface is 15 cm and 25 cm, the Young 's modulus of the aluminum single wire after smoldering of different fuels varies (224.4-821.9 MPa). When the height of the steel-cored aluminum strand from the combustible surface is 5cm, the flue gas temperature is high, and the outer aluminum strand of the steel-cored aluminum strand can absorb a certain amount of heat, thereby causing a small shape change occurrence.