The Whole Process Analysis for Non-uniform Ice Shedding of Transmission Lines
LU Yuan-bing ; LOU Wen-juan ;LI Huan-long
Author information+
Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, P.R.China
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History+
Received
Revised
Published
2009-06-11
2009-08-14
2010-09-25
Issue Date
2010-09-25
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.
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