Analysis of the Breakage Mechanism of Iced-Wire for a 220 kV Transmission Tower-Line System Considering the Microtopography

doi:10.11930/j.issn.1004-9649.2016.05.001.07

Abstract

Abstract: In order to analyze the effect of the microtopography on the imbalance tension of iced transmission lines and the amplifying effect when the iced wires are breaking, a finite model is developed for a four-tower-three-level tower-line system for the accident area. The model is applied to determine the critical thickness of the icing under different working conditions and the corresponding shocking responses when ice covered wires are breaking. Data is collected and cross-compared for different icing conditions and microtopographies. The results show that the heavy ice formulation in the microtopography and the large height difference between towers increase the imbalance tension. Further, the dynamic response effect caused by the breakage of the iced wires in the microtopography is significantly higher than in a non-microtopography area. Finally, the heavy formation of ice in the microtopography and the large height difference between towers increase the shocking effect of wire breakage.

Key words: microtopography, tower line system, finite element analysis, conductor form finding, icing, wire breakage shock

CLC Number:

TM 752+.5

ZHANG Yujiao, KONG Tao, SU Pan, DONG Xiaohu, LEI Chenghua. Analysis of the Breakage Mechanism of Iced-Wire for a 220 kV Transmission Tower-Line System Considering the Microtopography[J]. Electric Power, 2016, 49(5): 1-7.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.05.001.07

https://www.electricpower.com.cn/EN/Y2016/V49/I5/1

References

[1] 胡毅．电网大面积冰灾分析及对策探讨[J]．高电压技术，2008，34（２）：215-219．
HU Yi. Analysis and countermeasures discussion for large area icing accident on power grid [J]. High Voltage Engineering, 2008, 34(2): 215-219.
[2] 蒋兴良，易辉．输电线路覆冰及防护[M]．北京：中国电力出版社，2002．
[3] 陈鹏云，王羽．低温雨雪冰冻灾害对中国电网损毁性影响概述[J]．电网技术，２０１０，３４（１０）：１３５－１３９．
CHEN Pengyun, WANG Yu. Summary on the damaging effect of cryogenic freezing rain and snow disaster on power grid in China [J]. Power System Technology, 2010, 34(10): 135-139.
[4] 王守礼，李家垣．微地形微气象对送电线路的影响[M]．北京：中国电力出版社，1999：10－11．
[5] 晏致涛，李正良．重冰区输电塔–线体系导线断线分析[J]．中国电机工程学报，2010，30（７）：92-97．
YAN Zhitao, LI Zhengliang. Analysis of the transmission tower- line system in heavy ice regions subjected to cable rupture [J]. Proceedings of the CSEE, 2010, 30(7): 92-97.
[6] 刘春城，毛绪坤．大跨越输电塔－线体系覆冰断线数值模拟[J]．水电能源科学，201２，３０（５）：１３０－132．
LIU Chuncheng, MAO Xukun. Numerical simulation of icing broken lines of long-span transmission tower-line system [J]. Water Resources and Power, 2012, 31(3): 43-48.
[7] 刘春城，初征宇．大跨越高压输电线路覆冰断线的冲击动力学模型[J]．振动与冲击，２０１２，３１（３）：43-48．
LIU Chuncheng, CHU Zhengyu. Impact dynamics model of long span high voltage transmission lines subjected to iced wire breakage [J]. Journal of Vibration and Shock, 2012, 31(3): 43-48.
[8] 许家浩，郑伟，黄宵宁，等．微气象条件下输电线路导线覆冰预测模型[J]. 中国电力，２０１４，４７（２）：５８－６３．
XU Jiahao, ZHENG Wei, HUANG Xiaoning, et al. Transmission line icing prediction model under micro-meteorological conditions[J]. Electric Power, 2014, 47(2): 58-63.
[9] 张勇平，刘鸿斌，邓春，等．沽太500 kV双回线路覆冰舞动故障分析[J]. 中国电力，２０１０，４３（３）：２７－３０．
ZHANG Yongping, LIU Hongbin, DENG Chun, et al. Analysis of 500 kV Gu-Tai transmission line ice-coating galloping [J]. Electric Power, 2010, 43(3): 27-30.
[10] 罗朝祥，万华舰，罗文博，等．输电线路导线覆冰图像处理与识别技术[J]. 中国电力，２０１４，４７（９）：１３２－１３６．
LUO Chaoxiang, WAN Huanjian, LUO Wenbo, et al． Image processing and recognition technology for transmission line icing[J]. Electric Power, 2014, 47(9): 132-136.
[11] LUMMIS J, POHHLMAN J C. Flexible transmission structures operate to suppress cascading failures [C]//IEEE-Winter Meeting,New York, 1974.
[12] SWALD B O, SCHROEDER D, CATCHPOLE P. Investigative summary of the July 1993 Nebraska public district Grand Island Moore 345 kV transmission line failure[C]//Transmission and Distrbution Conference, Proceedings of the 1994 IEEE Power Engineering Society, 1994: 574-580.
[13] 蒋正龙，陆佳政．湖南2008年冰灾引起的倒塔原因分析[J]．高电压技术，２００８，３４（１１）：２４６８－２４７４．
JIANG Zhenglong, LU Jiazheng. Analysis of the causes of tower collapses in Hunan during the 2008 ice storm[J]. High Voltage Engineering, 2008, 34(11): 2468-2474.
[14] MCCLURE G, LAPOINTE M. Modeling the structural dynamic response of overhead transmission lines[J]. Camputer and Structres, 2003, 81: 825-834.
[15] FIEI F M, MCCLURE G. Modelling the dynamic response of iced transmission lines subjected to cable rupture and ice shedding [J]. IEEE Transactions on Power Delivery, 2013, 28(2): 948- 954.
[16] 杜志叶，张宇． 500 kV架空输电线路覆冰失效有限元仿真分析[J]．高电压技术，２０１２，３３（９）：２４３０－２４３６．
DU Zhiye, ZHANG Yu. Failure analysis of 500 kV iced overhead transmission line by finite element method[J]. High Voltage Engineering, 2012, 33(9): 2430-2436.
[17] 陆佳政，刘纯． 500 kV输电塔线覆冰有限元计算[J]．高电压技术，200７，３３（１０）：１６７－１６９．
LU Jiazheng, LIU Chun. Finite element calculation of 500 kV iced power transmission system [J]. High Voltage Engineering, 2007, 33(10): 167-169.