Unbalanced tension of heavily iced twin-bundle conductors under the joint action of ice-shedding and wind

ZHANG Yuelong1, GUO Yong1, LOU Wenjuan2, GU Yi1

Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (14) : 32-40.

PDF(1891 KB)
PDF(1891 KB)
Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (14) : 32-40.
VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Unbalanced tension of heavily iced twin-bundle conductors under the joint action of ice-shedding and wind

  • ZHANG Yuelong*1,GUO Yong1,LOU Wenjuan2,GU Yi1
Author information +
History +

Abstract

In heavy icing aera, multi-bundle conductors may experience a phenomenon where multiple sub-conductors become bonded together by ice, forming a single unit. This severe icing significantly increases the wind-exposed area of the conductor and deteriorates its aerodynamic profile. Consequently, the integral ice-covered state of multi-bundle conductors may result in a more pronounced wind-induced swing during the ice shedding process. This paper conducts wind tunnel tests on the aerodynamic characteristics of heavily iced transmission lines with two types of icing: integral ice-covered and independently ice-covered sub-conductors. Using the nonlinear finite element method, the dynamic responses of heavily iced twin-bundle conductors under joint action of ice-shedding and wind was simulated. The numerical simulation comprehensively considers the coupling effects of wind loads in the along-wind and vertical wind directions, the significant aerodynamic damping effect caused by fluid-structure interaction, and the abrupt change in wind load due to the alteration in aerodynamic shape and coefficients at the moment of ice shedding. The study analyzes the influence of icing types, wind attack angles, and wind speeds on the unbalanced tension, jump height, and axial force of insulator strings following conductor ice shedding. A simplified formula for calculating the maximum unbalanced tension is proposed. The results indicate that the maximum unbalanced tension during the ice-shedding process of heavily iced twin-bundle conductors is approximately 1.65 times the static unbalanced tension of ice accretion. Wind action may increase the maximum unbalanced tension and jump height of heavily iced twin-bundle conductors following ice shedding by approximately 29% and 16%, respectively, while its impact on the axial force can be neglected. This study provides a reference for the design of transmission lines in heavy icing aeras and for revisions to current standards.

Key words

Transmission line / Integral ice-covered shape / Wind tunnel test / Joint action of ice-sheddin

Cite this article

Download Citations
ZHANG Yuelong1, GUO Yong1, LOU Wenjuan2, GU Yi1. Unbalanced tension of heavily iced twin-bundle conductors under the joint action of ice-shedding and wind[J]. Journal of Vibration and Shock, 2025, 44(14): 32-40

References

[1] 侯慧, 尹项根, 陈庆前, 等. 南方部分500kV主网架2008年冰雪灾害中受损分析与思考[J]. 电力系统自动化, 2008(11):12-15+38. 
Hou H, Yin X G, Chen Q Q, et al. Review on the Wide Area Blackout of 500 kV Main Power Grid in Some Areas of South China in 2008 Snow Disaster [J]. Automation of Electric Power Systems, 2008(11):12-15+38.
[2] 吴登国. 强风作用下输电线路风偏和倒塔事故风险评估[D]. 浙江大学, 2020. 
Wu D G. The Risk Assessment of Transmission Line Flashover and Transmission Tower Collapse Accident Under Strong Wind Load [D]. Zhejiang University, 2020.
[3] 黄强, 王家红, 欧明勇.2005年湖南电网冰灾事故分析及其应对措施[J].电网技术,2005,29(24):16-19. 
Huang Qiang, Wang Jiahong, OU Mingyong. Analysis on Accidents Caused by Icing Damage in Hunan Power Grid in 2005 and Its Countermeasures [J]. Power System Technology, 2005, 29(24):16-19.
[4] 张跃龙, 楼文娟, 黄赐荣, 等. 局部脱冰对导线跳跃高度影响的参数化分析及局部脱冰效应系数研究[J].中南大学学报(自然科学版),2022,53(10):3959-3966.
Zhang Yuelong, Lou Wenjuan, Huang Cirong, et al. Parametric analysis of the effect of partial ice shedding on conductor jump height and study of the partial shedding effect factor[J]. Journal of Central South University(Science and Technology), 2022, 53(10):3959-3966.
[5] 杨风利, 李清华, 邵帅, 等. 脱冰工况下特高压输电铁塔地线横担受力特征及破坏模式[J].中国电机工程学报,2024,44(10):4157-4167.
Yang Fengli, Li Qinghua, Shao Shuai, et al. Mechanical Characteristics and Destroyed Modes for Cross-arm Supporting Ground Wires of UHV Transmission Tower Under Ice Shedding[J]. Proceedings of the CSEE, 2024, 44(10):4157-4167.
[6] 黄增浩, 杨旗, 李昊, 等. 相间间隔棒对紧凑型输电线路脱冰跳跃响应影响研究[J].电网技术,2024,48(02):923-932.
Huang Zenghao, Yang Qi, Li Hao, et al. Influence of Phase-to-phase Spacers on Ice-shedding Jumping of Compact Transmission Lines[J]. Power System Technology, 2024, 48(02):923-932.
[7] 张宇卓,江岳,李小亭,等.架空输电导线不均匀脱冰跳跃高度计算[J].振动与冲击,2023,42(11):75-86.
Zhang Yuzhuo, Jiang Yue, Li Xiaoting, et al. Calculation of jump height for uneven ice-shedding of overhead transmission lines[J]. Journal of Vibration and Shock, 2023, 42(11):75-86.
[8] Huang G Z, Yan B, Wen N, et al. Study on jump height of transmission lines after ice-shedding by reduced-scale modeling test[J]. Cold Regions Science and Technology, 2019, 165: 102781.
[9] Cui F J, Liu X J, Zhang S X, et al. Study on the influence of interphase spacers on ice shedding of three-phase iced eight-bundled transmission lines[J]. Cold Regions Science and Technology, 2020, 174: 103043.
[10] Huang G Z, Yan B, Guo Y J, et al. Experimental study on dynamic response characteristics of isolated-span transmission lines after ice-shedding[J]. High Voltage, 2022, 8(1): 196-208.
[11] Yang L, Chen Y F, et al. Prediction method for response characteristics parameters of isolated-span overhead lines after ice-shedding based on finite element simulation and machine learning[J]. Electric Power Systems Research, 2024, 229(2024): 110141.
[12] Wu K, Yan B, Yang H X, et al. Dynamic response characteristics of isolated-span transmission lines after ice-shedding[J]. IEEE Transactions on Power Delivery, 2023, 38(5): 3519-3530.
[13] 郭裕钧,闫向龙,黄桂灶,等.非均匀覆冰下输电导线的脱冰跳跃动力特性[J].高电压技术,2023,49(10):4411-4420.
Guo Yujun, Yan Xianglong, Huang Guizao, et al. Dynamic Characteristics of Transmission Line Conductors With Non-uniform Accreted Ice After Ice-shedding[J]. High Voltage Engineering, 2023,49(10):4411-4420.
[14] 王金锁,刘美瑶,岳华刚,等.不同覆冰形式的导线脱冰动力响应研究[J].振动与冲击,2021,40(20):193-199.
Wang Jinsuo, Liu Meiyao, Yue Huagang, et al. A study of dynamic response characteristic of ice-shedding on conductors for overhead lines under different ice-coating types[J]. Journal of Vibration and Shock, 2021,40(20):193-199.
[15] Kermani M, Farzaneh M, & Kollar, L E. The effects of wind induced conductor motion on accreted atmospheric ice[J]. IEEE Transactions on power delivery, 2013, 28(2), 540-548.
[16] 姚陈果,张薷方,张磊,等.架空输电塔-线体系导线风振对脱冰的影响[J].高电压技术,2014,40(02):381-387.
Yao Chenguo, Zhang Leifang, Zhang Lei, et al. Influence of wind vibration of overhead transmission tower-line system on ice shedding[J]. High Voltage Engineering, 2014, 40(02):381-387.
[17] 刘敏,晏致涛,冯上铭,等.多跨覆冰导线脱冰振动模型风洞试验研究[J].振动与冲击,2018,37(03):223-229.
Liu Min, Yan Zhitao, Feng Shangming, et al. Wind tunnel model tests for ice-shedding vibration of multi-span icing conductors[J]. Journal of Vibration and Shock, 2018,37(03):223-229.
[18] Lou W, Lv J, Huang M F, Yang L, & Yan D. Aerodynamic force characteristics and galloping analysis of iced bundled conductors[J]. Wind & structures, 2014, 18(2), 135-154.
[19] Yan B, Chen K Q, Guo Y M, et al. Numerical Simulation Study on Jump Height of Iced Transmission Lines After Ice Shedding[J]. IEEE Transactions on Power Delivery, 2013, 28(1): 216-225.
[20] Yang F L, Yang J B, Zhang Z F. Unbalanced tension analysis for UHV transmission towers in heavy icing areas[J]. Cold Regions Science and Technology, 2012, 70: 132-140.
[21] Yu Y P, Chen L H, Wang J J, et al. Dynamic Characteristics Analysis of Ice-Adhesion Transmission Tower-Line System under Effect of Wind-Induced Ice Shedding[J]. Computer Modeling in Engineering & Sciences, 2020, 125(2): 647-670.
[22] Lou W J, Zhang Y L, Xu H W, & Huang M F. Jump height of an iced transmission conductor considering joint action of ice-shedding and wind[J]. Cold Regions Science and Technology, 2022, 199, 103576.
[23] 楼文娟,张跃龙,徐海巍.考虑冰风耦合作用的输电导线脱冰动张力及参数影响分析[J].高电压技术,2022,48(03):1052-1059.
Lou Wenjuan, Zhang Yuelong, Xu Haiwei. Dynamic Tension Following Ice Shedding and Parameters’ Influence Analysis of Transmission Conductor Considering the Coupling Effect of Ice and Wind[J]. High Voltage Engineering, 2022, 48(03):1052-1059.
[24] 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.
Jiang X L, Yi H. Iced transmission line and protection[M]. Beijing, China: China Power Press, 2002.
[25] Yang F L, Yang J B, Han J K, et al. Dynamic responses of transmission tower-line system under ice shedding[J]. International Journal of Structural Stability and Dynamics, 2010, 10(3): 461-481.
[26] 中华人民共和国住房和城乡建设部.GB50009-2012, 建筑结构荷载规范[S].中国建筑工业出版社, 北京, 2012.
[27] Kaimal J C, Wyngaard J C, Izumi Y, et al. Spectral characteristics of surface-layer turbulence[J]. Quarterly Journal of the Royal Meteorological Society, 1972, 98(417): 563-589.
[28] Davenport A G. The dependence of wind loads on meteorological parameters[C]//Proceedings of the International Research Seminar “Wind Effects on Buildings and Structures”. Ottawa, Canada: University of Toronto Press, 1967: 19-82.
[29] 楼文娟,吴登国,苏杰,等. 超高压输电线路风偏闪络及导线风荷载取值讨论[J]. 高电压技术,2019,45(4):1249-1255.
Lou Wenjuan, Wu Dengguo, Su Jie, et al. Discussion on wind-induced swing flashover and conductor wind load of EHV transmission lines[J]. High Voltage Engineering, 2019, 45(4):1249-1255.
[30] DL/T 5440-2020, 重覆冰架空输电线路设计技术规程[S].中国计划出版社, 北京, 2020.
[31] 中国电力企业联合会.GB 50545-2010, 110kV~750kV架空输电线路设计规范[S]. 中国计划出版社, 北京, 2010. 
PDF(1891 KB)

230

Accesses

0

Citation

Detail

Sections
Recommended

/