Analyzing Loads from Ice Shedding Conductors for UHV Transmission Towers in Heavy Icing Areas
Publication: Journal of Cold Regions Engineering
Volume 28, Issue 3
Abstract
In this paper, a finite element analysis (FEA) model of seven span continuous conductors and insulators for an ultra high voltage (UHV) transmission line in a heavy icing area was established for ice shedding analysis. The parameters considered in the ice shedding simulation analysis include damping ratio, ice shedding ratio, ice shedding modes, and ice thickness. The dynamic responses including jumping heights, unbalanced tensions, and vertical loads at the end of the insulator were obtained. The effects of each of the parameters on the dynamic responses were discussed. The design values for unbalanced tensions and vertical loads were proposed for the UHV suspension tower in a heavy icing area based on the analyses results. The dynamic magnification factors of the vertical load should be between 1.06 and 1.11. For the suspension tower in 20 and 30 mm icing areas, the uplift load percentage is proposed to be 10%. For the suspension towers in 40 and 50 mm icing areas, the uplift load percentage is proposed to be 5%.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This work has been funded by the State Grid Corporation of China, and the financial aid number is GC71-10-007. The authors would like to thank the sponsor State Grid Corporation of China.
References
ANSYS [Computer software]. ANSYS Inc., Berkeley, CA.
Chen, Y., Hu, W., Wang, L. M., and Hou, L. (2009). “Research on ice-shedding characteristics of icing conductors.” Proc. Chin. Soc. Electr. Eng., 29(28), 115–121.
China Electricity Council (CEC). (2009). “Technical code for designing of overhead transmission line in medium & heavy icing area.”, Beijing, China.
China Electric Power Research Institute (CEPRI). (2008). “Study on the measurements for preventing accidents of the transmission line system under ice shedding.”, Beijing, China.
Du, J. J. (2010). “Structural damping effect on compressor blade vibration response.” Aero-Engine Eng. Technol., 31(4), 12–14.
Hou, L., Wang, L. M., Zhu, P. X., and Guan, Z. C. (2008). “Dynamic behavior computation of ice shedding of UHV overhead transmission lines.” Proc. Chin. Soc. Electr. Eng., 28(6), 1–6.
Hu, W., et al. (2010). “Ice-shedding characteristics of 1000kV AC double circuit transmission line on the same tower.” High Voltage Eng., 36(1), 275–280.
Jake, J. (2001). “Numerical modeling of snow-shedding effects on a 110kV overhead power line in Slovenia.” Proc., Eleventh Int. Offshore and Polar Engineering Conf., The International Society of Offshore and Polar Engineers, Stavanger, Norway, 690–694.
Kalman, T., Farzaneh, M., and McClure, G. (2007). “Numerical analysis of the dynamic effects of shock-load-induced ice shedding on overhead ground wires.” Comput. Struct., 85(7–8), 375–384.
Meng, X. B., et al. (2011). “Dynamic characteristic of ice-shedding on UHV overhead transmission lines.” Cold Regions Sci. Technol., 66(1), 44–52.
North-East Electric Power Design Institute (NEPDI) of State Power Corporation of China. (2002). Design manual for high-voltage transmission lines of electric power engineering, China Electric Power Press, Beijing, China.
Roshan Fekr, M., and McClure, G. (1998). “Numerical analysis of the dynamic response of ice shedding on electrical transmission lines.” Atmos. Res., 46(1–2), 1–11.
Shen, G. H., Xu, X. B., Lou, W. J., and Sun, B. N. (2011). “Applicability analysis of finite element methodologies to simulate the ice-accreting and ice-shedding on transmission lines.” Eng. Mech., 28(10), 9–15.
State Grid Electric Power Research Institute (SGEPRI). (2008). “Study on the ice shedding from conductors of 1000kV double circuit AC transmission lies.”, Beijing, China.
Yan, Z. T., Li, Z. L., and Wang, Z. S. (2010). “Simulation of ice-shedding of transmission tower-line system in heavy ice regions.” Eng. Mech., 27(1), 209–227.
Yang, F. L., Yang, J. B., Fu, D. J., and Han, J. K. (2010a). “Analysis on dynamic responses of transmission tower-line system under ice shedding.” J. Vibr. Eng., 23(1), 86–93.
Yang, F. L., Yang, J. B., Li, Z., Han, J. K., and Fu, D. J. (2010b). “Study on the ice shedding and vibration suppression of transmission line.” J. Vibr. Shock, 29(5), 20–25.
Yang, F. L., Yang, J. B., and Zhang, Z. F. (2012). “Unbalanced tension analysis for UHV transmission towers in heavy icing areas.” Cold Regions Sci. Technol., 70, 132–140.
Zhu, K. J., Liu, B., Liu, C. Q., and Fu, D. J. (2008). “Research on anti-galloping for UHV transmission line.” Proc. Chin. Soc. Electr. Eng., 28(34), 12–20.
Information & Authors
Information
Published In
Journal of Cold Regions Engineering
Volume 28 • Issue 3 • September 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 10, 2012
Accepted: Feb 20, 2014
Published online: Apr 28, 2014
Published in print: Sep 1, 2014
Discussion open until: Sep 28, 2014
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.