The Whole Process Analysis for Non-uniform Ice Shedding of Transmission Lines

LU Yuan-bing;LOU Wen-juan;LI Huan-long

Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (9) : 47-50.

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PDF(1452 KB)
Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (9) : 47-50.
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The Whole Process Analysis for Non-uniform Ice Shedding of Transmission Lines

  • LU Yuan-bing ; LOU Wen-juan ;LI Huan-long
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Abstract

ABSTRACT: A finite element model of a three-span transmission lines system was built with ANSYS. The form-finding of cables was completed, and the dynamic characteristics pre and post ice-shedding were discussed. The whole process analysis for non-uniform ice-shedding of transmission lines was realized by simulating the steady response during icing, the transient and the steady response after ice-shedding. The study found that the static equilibrium-based form-finding method is efficient, and the frequencies of the system change little while icing. The maximum tensions of the cable and the insulator string increase to 3.9 and 4 times of the initial tensions respectively when the ice thickness raises up to 30mm. The influence of the non-uniform ice-shedding on the cable tension can be ignored, while it enlarges the insulator string tension significantly and produces an unbalanced tension with a transient magnitude of 2 times of the cable’s initial tension, threatening the transmission towers.

Key words

transmission lines / ice-shedding / icing / form-finding / dynamic characteristics.

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LU Yuan-bing;LOU Wen-juan;LI Huan-long. The Whole Process Analysis for Non-uniform Ice Shedding of Transmission Lines[J]. Journal of Vibration and Shock, 2010, 29(9): 47-50
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