Abstract

AbstractUHV transmission is an important form of long-distance and large capacity power transmission. Icing, high wind and other harsh environments are important factors leading to the damage of UHV transmission tower and line systems. Based on the finite element method, the integrated modelling of the tower and line system of the UHV transmission line were studied in conjunction with the mechanical characteristics of the tower and line system; a four-tower, three-span simulation model of the UHV AC double transmission line was established to analyze the stress distribution of the towers under different wind speeds and ice thicknesses, and to obtain the critical failure load combination of the towers. The results are close to the design wind speed and ice thicknesses. The analysis of structural weak spot distribution, tower failure and maximum node displacement of the pole tower was carried out to obtain the distribution of weak spots and node displacement of the pole tower, and the relationship with the thickness of ice cover and wind speed was studied. The results can be used in the research of pole tower monitoring and early warning.KeywordsUHVTower-line systemFinite element methodStressWeak spot

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