Mechanical Calculation of Power Lines and Strands in Overhead Transmission Lines
1 Computational Mechanics, Northeast Dianli University, 132012 Jilin, China
2 Civil Engineering, Northeast Dianli University , 132012 Jilin, China
3 Transmission Engineering, Northeast Dianli University, 132012 Jilin, China
This paper discusses the issue of shape and stress of overhead transmission lines. It fully considers that the conductor is subjected to axial force, shear, bending moment simultaneousiy. And the flat wire is basically in the elastic range. Because the stress is the strength of a certain point, the bending rigidity of the overhead lines can not be ignored. However, the catenary has been used in previous research and the force of the overhead lines is obtained on this basis. The author establishes a model of wire calculation under real condition, and gives a feasible simplified model. And then it gives the line shape formula, internal force formula, formula of stress in the strands. The results show that the original stress is significantly smaller.In this paper, the stress formula is almost close to the reality. It proves the reliability of the simplified model that the line shape includes the original flexible part.The results can not only fill the gaps in the theoretical study of the overhead lines, but also have some guidance to the production and design of overhead lines.
© Owned by the authors, published by EDP Sciences, 2016
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