Numerical Study of Ultra-High Voltage Transmission Tower Wind Loads Characteristics Against Tornado

doi:10.11930/j.issn.1004-9649.202305124

Abstract

Abstract:

In this paper, the wind load characteristics of the Ultra-High Voltage transmission tower under tornado are studied based on the CFD (computational fluid dynamics) numerical simulation method. The numerical model of a full-scale tornado is established. The measured radar data of Spencer tornado as the velocity inlet are adopted to generate the tornado-like wind field, and the impacts of the surface roughness are considered. The tangential velocity and core radius at different heights are obtained, then contrasted with the measured data to verify the rationality of the tornado-like vortex structure. Next, the overall refined CFD numerical modeling of the transmission tower is established, then the SST k-ω turbulence model based on RANS is used to simulate the flow around the transmission tower under tornado. The effects of the different locations and wind directions on the shape coefficients of each section of the transmission tower are studied. It is found that the wind loads of the top section 1 to section 4 of the transmission tower would take the maximum when the tower is located at the wind field of 1.5D (D is the core radius), and the wind loads of the bottom section 5 to section 9 of the transmission tower are the maximum when the tower is located at the wind field of 1.0D. The wind loads of transmission tower reach the maximum when the tower is located at the wind field of 1.0D. The worst wind attack angle of the transverse directions of the transmission tower increases from 60° to 90°, and the worst wind attack angle of the longitudinal directions of the transmission tower varies in the range of 0° to 30° as the distance from the center of tornado increases. The simulated wind load shape coefficient of the transmission tower at the locations of 1.0D and 1.5D are larger than the code values, and all sections (except for the section 7, 8 and 9 at the location of 1.5D) are also larger than the code values.

Key words: tornado, transmission tower, surface roughness, wind loads, CFD numerical simulation

Shun ZHANG, Zhenguo WANG, Wendong JIANG, Feng XU, Zhongdong DUAN. Numerical Study of Ultra-High Voltage Transmission Tower Wind Loads Characteristics Against Tornado[J]. Electric Power, 2023, 56(10): 153-163.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202305124

https://www.electricpower.com.cn/EN/Y2023/V56/I10/153

Figures/Tables 16

Fig.1 Tornado CFD numerical model

Fig.2 Comparison of core radius and maximum tangential wind speed with different grid numbers

Fig.3 Comparison of numerical simulation and measured tangential wind speed with radial variation

Fig.4 Velocity contours and trajectories of the internal flow field

Fig.5 Transmission tower 3D model and segment

Fig.6 Overall grid division of computational domain

Fig.7 Grid division of calculation domain overall and transmission tower surface

Fig.8 Coordinate system and wind direction angle

Fig.9 Comparison of core radius and maximum tangential wind speed of tornado wind field before and after loading the transmission tower

Fig.10 Variation of wind load shape coefficients for different tower sections and overall wind field positions

Fig.11 Variation of body shape coefficient with wind direction angle for different tower sections at 0.5D position

Fig.12 Variation of body shape coefficient with wind direction angle for different tower sections at 1.0D position

Fig.13 Variation of body shape coefficient with wind direction angle for different tower sections at 1.5D position

Fig.14 Variation of body shape coefficient with wind direction angle for different tower sections at 2.0D position

Fig.15 Variation of body shape coefficient with wind direction angle for different tower sections at 3.0D position

Fig.16 Comparison between simulated and standard values of wind load body shape coefficient in sections

References 30

1	李政麒, 蔡晔, 曹一家, 等. 美国得州“2·15”停电事故分析及对中国新型电力系统供电充裕度的启示[J]. 电力科学与技术学报, 2022, 37 (5): 17- 24.
	LI Zhengqi, CAI Ye, CAO Yijia, et al. Analysis of "2·15" blackout in Texas and its enlightenment to China's new power system supply adequacy[J]. Journal of Electric Power Science and Technology, 2022, 37 (5): 17- 24.
2	方健, 王红斌, 刘育权, 等. 配电网灾后动态抢修滚动优化决策方法[J]. 南方电网技术, 2021, 15 (5): 122- 128. DOI
	FANG Jian, WANG Hongbin, LIU Yuquan, et al. Rolling optimization decision strategy of dynamic repairing in power distribution network after disasters[J]. Southern Power System Technology, 2021, 15 (5): 122- 128. DOI
3	何嘉兴, 张行, 王红斌, 等. 极端灾害下考虑应急转供的配网停电过程仿真方法[J]. 智慧电力, 2020, 48 (4): 104- 111. DOI
	HE Jiaxing, ZHANG Hang, WANG Hongbin, et al. Simulation method of distribution network outages porcess considering emergency transfer under exetreme disaster[J]. Smart Power, 2020, 48 (4): 104- 111. DOI
4	胡源, 薛松, 张寒, 等. 近30年全球大停电事故发生的深层次原因分析及启示[J]. 中国电力, 2021, 54 (10): 204- 210.
	HU Yuan, XUE Song, ZHANG Han, et al. Cause analysis and enlightenment of global blackouts in the past 30 years[J]. Electric Power, 2021, 54 (10): 204- 210.
5	HAMADA A, EL DAMATTY A A, HANGAN H, et al. Finite element modelling of transmission line structures under tornado wind loading[J]. Wind and Structures an International Journal, 2010, 13 (5): 451- 469. DOI
6	李改琴, 许庆娥, 吴丽敏, 等. 一次龙卷风天气的特征分析[J]. 气象, 2014, 40 (5): 628- 636. DOI
	LI Gaiqin, XU Qing'e, WU Limin, et al. Characteristics analysis of tornado weather[J]. Meteorological Monthly, 2014, 40 (5): 628- 636. DOI
7	黄大鹏, 赵珊珊, 高歌, 等. 近30 a中国龙卷风灾害特征研究[J]. 暴雨灾害, 2016, 35 (2): 97- 101. DOI
	HUANG Dapeng, ZHAO Shanshan, GAO Ge, et al. Disaster characteristics of tornadoes over China during the past 30 years[J]. Torrential Rain and Disasters, 2016, 35 (2): 97- 101. DOI
8	单葆国, 刘青, 张莉莉, 等. 新形势下“十四五”后三年中国电力需求形势研判[J]. 中国电力, 2023, 56 (3): 1- 11.
	SHAN Baoguo, LIU Qing, ZHANG Lili, et al. Analysis of China's power demand situation in the last three years of the "14 th five-year plan" under the new situation[J]. Electric Power, 2023, 56 (3): 1- 11.
9	姚远, 赵文彬, 卢武, 等. 多风速段下低风阻导线抗风能力实验分析及导线截面结构参数优化[J]. 电力系统保护与控制, 2021, 49 (21): 97- 106. DOI
	YAO Yuan, ZHAO Wenbin, LU Wu, et al. Wind resistance test and optimal design of cross-sectional structure of a drag-reduced conductor at multiple wind speed levels[J]. Power System Protection and Control, 2021, 49 (21): 97- 106. DOI
10	白俊峰, 鞠彦忠, 曾聪. 龙卷风作用下空间桁架的受力分析[J]. 东北电力大学学报, 2011, 31 (S1): 46- 51. DOI
	BAI Junfeng, JU Yanzhong, ZENG Cong. Force analysis of space truss subjected to tornado loads[J]. Journal of Northeast Dianli University, 2011, 31 (S1): 46- 51. DOI
11	赖嘉贤. 龙卷风作用下输电铁塔稳定性分析[D]. 广州: 广州大学, 2018.
	LAI Jiaxian. Stability analysis of transmission tower under tornado[D]. Guangzhou: Guangzhou University, 2018.
12	庞小龙. 龙卷风作用下高压输电塔-线体系倒塌破坏机理研究[D]. 广州: 广州大学, 2020.
	PANG Xiaolong. Study on collapse failure mechanism of high voltage transmission tower-line system under tornado[D]. Guangzhou: Guangzhou University, 2020.
13	国家能源局. 架空输电线路荷载规范: DL/T 5551—2018[S]. 北京: 中国计划出版社, 2018.
	National Energy Bureau of the People's Republic of China. Load code for the design of overhead transmission line: DL/T 5551—2018[S]. Beijing: China Planning Press, 2018.
14	SAVORY E, PARKE G A R, ZEINODDINI M, et al. Modelling of tornado and microburst-induced wind loading and failure of a lattice transmission tower[J]. Engineering Structures, 2001, 23 (4): 365- 375. DOI
15	ASCE 74-2009. Guidelines for electrical transmission line structural loading[S]. America: American Society of Civil Engineers, 2009.
16	HAMADA A, EI DAMATTY A A. Behaviour of guyed transmission line structures under tornado wind loading[J]. Computers & Structures, 2011, 89 (11/12): 986- 1003.
17	EI DAMATTY A A, HAMADA A. F2 tornado velocity profiles critical for transmission line structures[J]. Engineering Structures, 2016, 106, 436- 449. DOI
18	HAMADA A, EI DAMATTY A A. Behaviour of transmission line conductors under tornado wind[J]. Wind and Structures, 2016, 22 (3): 369- 391. DOI
19	ALTALMAS A, EI DAMATTY A A. Finite element modelling of self-supported transmission lines under tornado loading[J]. Wind and Structures, 2014, 18 (5): 473- 495. DOI
20	王勇, 吕令毅. 龙卷风作用下输电塔结构的单向流固耦合分析[J]. 特种结构, 2017, 34 (2): 13- 19.
	WANG Yong, LV Lingyi. One-way fluid-structure interaction analysis of transmission tower under tornado loading[J]. Special Structures, 2017, 34 (2): 13- 19.
21	ALEXANDER C R, WURMAN J. The 30 may 1998 spencer, South Dokota, storm. part Ⅰ: the structural evolution and environment of the tornadoes[J]. Monthly Weather Review, 2005, 133 (1): 72- 97. DOI
22	WURMAN J, ALEXANDER C R. The 30 may 1998 spencer, South Dokota, storm. part Ⅱ: comparison of observed damage and radar-derived winds in the tornadoes[J]. Monthly Weather Review, 2005, 133 (1): 97- 119. DOI
23	MOCHIDA A, TABATA Y, IWATA T, et al. Examining tree canopy models for CFD prediction of wind environment at pedestrian level[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2008, 96 (10/11): 1667- 1677.
24	张洪华. OpenFOAM中稳态大气边界层风洞的开发研究[D]. 哈尔滨: 哈尔滨工业大学, 2013.
	ZHANG Honghua. Development and research of steady-state atmospheric boundary layer wind tunnel in OpenFOAM[D]. Harbin: Harbin Institute of Technology, 2013.
25	马杰. 移动龙卷风对低矮建筑物风荷载特性研究[D]. 哈尔滨: 哈尔滨工业大学, 2018.
	MA Jie. Study on wind load characteristics of moving tornado on low buildings[D]. Harbin: Harbin Institute of Technology, 2018.
26	中华人民共和国住房和城乡建设部. 建筑工程风洞试验方法标准: JGJ/T 338—2014[S]. 北京: 中国建筑工业出版社, 2015.
	Ministry of Housing and Urban-Rural Development of the People's Republic of China. Standard for wind tunnel test of buildings and structures: JGJ/T 338—2014[S]. Beijing: China Architecture & Building Press, 2015.
27	杨风利. 角钢输电铁塔横担角度风荷载系数取值研究[J]. 工程力学, 2017, 34 (4): 150- 159.
	YANG Fengli. Study on skewed wind load factor on cross-arms of angle steel transmission towers under skewed wind[J]. Engineering Mechanics, 2017, 34 (4): 150- 159.
28	ZHANG D K, HU X Y, SONG X Q, et al. Investigation on aerodynamic characteristics for steel tubular cross-arms of transmission tower under skew wind[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2022, 222, 104914. DOI
29	刘道永. 龙卷风作用方位对结构的荷载影响研究[D]. 南京: 东南大学, 2016.
	LIU Daoyong. Study on the influence of tornado action direction on the load of structure[D]. Nanjing: Southeast University, 2016.
30	中华人民共和国住房和城乡建设部. 1000 kV架空输电线路设计规范: GB 50665—2011[S]. 北京: 中国计划出版社, 2012.
	Ministry of Housing and Urban-Rural Development of the People's Republic of China. Code for design of 1000 kV overhead transmission line: GB 50665—2011[S]. Beijing: China Planning Press, 2012.

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