Research on uneven iced transmission lines and the dynamic response after ice-shedding

Subjects: Mechanics >> Solid Mechanics submitted time 2023-06-21 Cooperative journals: 《应用力学学报》

张健 张宇卓 王金锁 褚忠凯 孙清 周文武 江岳

Abstract： The finite element method is used to analyze the deformation law and ice-shedding dynamic response law of 750 kV EHV transmission line under uneven icing condition.The model of “insulator string six bundle conductor” is established,and the conductor shape and its ice-shedding dynamic response under uniform icing,three section icing,linear icing and high altitude icing are compared and analyzed.The influences of span number,span length,height difference,icing thickness and ice-shedding rate on the shape change and ice-shedding jump height of conductors under high altitude icing conditions are mainly discussed.The results show that the conductor deformation and ice-shedding jump height increase with the increase of span number,span length and icing thickness.When the height difference of the fourth span increases,the slip along the horizontal direction of the conductor increases,while the ice-shedding jump height decreases.When the fourth span is 1 000 m under uniform icing,the ice shedding jump height of the conductor has a peak value,which is 25.627 m.The above research results show that the UHV transmission line is uniformly covered.

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