基于水滴碰冻效率的扩径导线防冰特性分析

doi:10.19595/j.cnki.1000-6753.tces.220350

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Abstract Conductor icing endangers the safety of power grid. Conductor anti-icing and de-icing methods have always been the focus of domestic scholars. In recent years, the method of using expanded conductor for anti-icing has been put forward by some scholars.
In order to understand the anti-icing characteristics of expanded conductor, firstly, the water droplet collision and freezing process on the conductor with different diameter are analyzed. Based on the boundary element method, considering the drag effect of airflow on water droplets, a computational model of airflow field on conductors is established, and the overall collision efficiency of water droplets on conductors is obtained by tracking the trajectory of water droplets, which represents the droplet capture ability of conductors with different diameters.
Secondly, the influence of conductor diameter on water droplet collision efficiency and icing rate is studied. The simulation results show that the airflow drag force on the water droplets increases due to the increase of the conductor diameter, which reduces the ratio of the water droplet collided with the conductor due to the inertial effect. And the overall droplet collision efficiencyon conductor surface gradually decreases with the increase of the conductor diameter. However, as the maximum local droplet collision efficiency is at the stagnation point on the windward side, with the increase of conductor diameter, the maximum local droplet collision efficiency at the stagnation point gradually decreases.And the collision range is expanding, resulting in the amount of captured water droplets stopping decreasing with the increase of conductor diameter. Therefore, it is necessary to calculate the overall water droplets capturedby the conductor per unit time dM/dt to determine the droplets capturing capacity ofconductorswithdifferentdiameters.
Thirdly, the definition of the critical anti-icing diameter of the expanded conductor is proposed as follows: under the same environmental conditions, when the diameter of the expanded conductor is greater than D_P, the icing rate of the conductor continues to decrease, D_P is the critical diameter of anti-icing of the expanded conductor under this environmental condition.The simulation results show that the larger the wind velocity is, the larger the critical diameter D_P. With the increase of MVD, the larger water droplets are more likely to collide with the conductor under the inertial action, and the corresponding D_P under the condition of large MVD is also greater.
The anti-icing performance of the expanded conductor is verified by the natural icing test of aluminum tubes with different diameters. The results show that the maximum droplet collision efficiency decreases with the increase of conductor diameter, but the droplets collision range will expand; As the water droplet capture rate and icing rate first increase and then decrease with the increase of conductor diameter, the diameter of expanded conductor for anti-icing needs to be greater than D_P. The larger the wind velocity and median volume diameter of water droplets, the higher the ambient temperature, and the greater the value of D_P.

Key words： Expanded conductor icing water droplets collision efficiency anti-icing

Received: 10 March 2022

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TM85

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	Wu Haitao
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	Jiang Xingliang
	Guo Sihua

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Wu Haitao,Han Xingbo,Jiang Xingliang等. Analysis of Anti-Icing Characteristics of Expanded Diameter Conductor Based on Water Droplet Collision and Freezing Efficiency[J]. Transactions of China Electrotechnical Society, 2023, 38(11): 3033-3040.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.220350 OR https://dgjsxb.ces-transaction.com/EN/Y2023/V38/I11/3033

[1] 蒋兴良, 侯乐东, 韩兴波, 等. 输电线路导线覆冰扭转特性的数值模拟[J]. 电工技术学报, 2020, 35(8): 1818-1826.
Jiang Xingliang, Hou Ledong, Han Xingbo, et al.Numerical simulation of torsion characteristics of transmission line conductor[J]. Transactions of China Electrotechnical Society, 2020, 35(8): 1818-1826.
[2] 何青, 李军辉, 邓梦妍, 等. 架空输电导线覆冰冻结系数计算及其影响因素分析[J]. 电工技术学报, 2019, 34(19): 4162-4169.
He Qing, Li Junhui, Deng Mengyan, et al.Calculation and influencing factors of icing freezing coefficient of overhead transmission line[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 4162-4169.
[3] 贵州电网有限责任公司组. 电网防冰关键技术工程应用[M]. 北京: 中国电力出版社, 2014.
[4] 蒋兴良, 申强. 环境参数对导线覆冰厚度影响的试验分析[J]. 高电压技术, 2010, 36(5): 1096-1100.
Jiang Xingliang, Shen Qiang.Experimental research on influence of environmental parameters on the conductor icing thickness[J]. High Voltage Engineering, 2010, 36(5): 1096-1100.
[5] 黄亚飞, 蒋兴良, 任晓东, 等. 采用涡流自热环防止输电线路冰雪灾害的方法研究[J]. 电工技术学报, 2021, 36(10): 2169-2177.
Huang Yafei, Jiang Xingliang, Ren Xiaodong, et al.Study on preventing icing disasters of transmission lines by use of eddy self-heating ring[J]. Transactions of China Electrotechnical Society, 2021, 36(10): 2169-2177.
[6] He Qing, Zhang Jian, Deng Mengyan, et al.Rime icing on bundled conductors[J]. Cold Regions Science and Technology, 2019, 158: 230-236.
[7] 蒋兴良, 姜方义, 汪泉霖, 等. 基于最优时间步长模型的输电导线雾凇覆冰预测[J]. 电工技术学报, 2018, 33(18): 4408-4418.
Jiang Xingliang, Jiang Fangyi, Wang Quanlin, et al.Prediction of rime accretion on transmission line based on optimal time step model[J]. Transactions of China Electrotechnical Society, 2018, 33(18): 4408-4418.
[8] 尹芳辉, 蒋兴良, Masoud Farzaneh.导线表面电场强度对导线覆冰的影响[J]. 高电压技术, 2018, 44(3): 1023-1033.
Yin Fanghui, Jiang Xingliang, Farzaneh M.Influences of electric field of conductors surface on conductor icing[J]. High Voltage Engineering, 2018, 44(3): 1023-1033.
[9] 蒋兴良, 张满, 胡建林, 等. 混合凇覆冰对导线起晕电压的影响研究[J]. 电网技术, 2013, 37(9): 2534-2540.
Jiang Xingliang, Zhang Man, Hu Jianlin, et al.Research on the influences of mixed-phase ice on corona inception voltage of stranded conductor[J]. Power System Technology, 2013, 37(9): 2534-2540.
[10] Imai I.Studies on ice accretion[J]. Researches on Snow and Ice, 1954, 3(1): 35-44.
[11] Chaîné P M, Castonguay G.New approach to radial ice thickness concept applied to bundle-like conductors[R]. Toronto, Environment Canada, Atmospheric Environment, 1974.
[12] Makkonen L.Models for the growth of rime, glaze, icicles and wet snow on structures[J]. Philosophical Transactions of the Royal Society of London Series A: Mathematical, Physical and Engineering Sciences, 2000, 358(1776): 2913-2939.
[13] 韩兴波, 吴海涛, 郭思华, 等. 用于覆冰环境测量的旋转多导体直径选择方法研究[J]. 电工技术学报, 2022, 37(15): 3973-3980.
Han Xingbo, Wu Haitao, Guo Sihua, et al.research on diameter selection method of rotating multi-conductor for measurement of icing environmental parameters[J]. Transactions of China Electro technical Society, 2022, 37(15): 3973-3980
[14] 郭昊, 刘沛清, 屈秋林, 等. 输电线雾凇覆冰的工程估算方法[J]. 高电压技术, 2011, 37(4): 1041-1049.
Guo Hao, Liu Peiqing, Qu Qiulin, et al.Estimation engineering method of rime accretion process on transmission lines[J]. High Voltage Engineering, 2011, 37(4): 1041-1049.
[15] 陈凌, 蒋兴良, 胡琴, 等. 自然条件下基于旋转多圆柱体覆冰厚度的绝缘子覆冰质量估算[J]. 高电压技术, 2011, 37(6): 1371-1376.
Chen Ling, Jiang Xingliang, Hu Qin, et al.Evaluation of ice mass on insulator under natural icing condition based on the ice thickness accumulated on rotating multi-cylinder[J]. High Voltage Engineering, 2011, 37(6): 1371-1376.
[16] Montambault S, Pouliot N.Design and validation of a mobile robot for power line inspection and maintenance[M]//Berlin, Heidelberg: Springer Berlin Heidelberg, 2008.
[17] 刘文涛, 和识之, 陈亦平, 等. 基于直流融冰的电网大面积冰灾防御策略[J]. 电力系统自动化, 2012, 36(11): 102-107.
Liu Wentao, He Shizhi, Chen Yiping, et al.Defensive strategy for wide area ice disaster of power grid based on DC deicer[J]. Automation of Electric Power Systems, 2012, 36(11): 102-107.
[18] 谷山强, 陈家宏, 蔡炜, 等. 输电线路激光除冰技术试验分析及工程应用设计[J]. 高电压技术, 2009, 35(9): 2243-2249.
Gu Shanqiang, Chen Jiahong, Cai Wei, et al.Experimental analysis and engineering designing of laser de-icing technology for transmission lines[J]. High Voltage Engineering, 2009, 35(9): 2243-2249.
[19] 董玉明, 万建成, 王孟, 等. 扩径导线在张拉载荷下的股线分层应力计算[J]. 电力科学与工程, 2015, 31(7): 65-69.
Dong Yuming, Wan Jiancheng, Wang Meng, et al.Stress calculation of between layered strands of expanded conductor under tension[J]. Electric Power Science and Engineering, 2015, 31(7): 65-69.
[20] 毕聪来, 蒋兴良, 韩兴波, 等. 采用扩径导线替代分裂导线的防冰方法[J]. 电工技术学报, 2020, 35(11): 2469-2477.
Bi Conglai, Jiang Xingliang, Han Xingbo, et al.Anti-icing method of using expanded diameter conductor to replace bundle conductor[J]. Transactions of China Electrotechnical Society, 2020, 35(11): 2469-2477.
[21] 陆彬, 高山, 孙逊, 等. 不同直径下导线覆冰增长特性[J]. 高电压技术, 2014, 40(2): 458-464.
Lu Bin, Gao Shan, Sun Xun, et al.Icing accretion characteristics of wires with different diameters[J]. High Voltage Engineering, 2014, 40(2): 458-464.
[22] 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.
[23] 韩兴波, 蒋兴良, 毕聪来, 等. 基于分散型旋转圆导体的覆冰参数预测[J]. 电工技术学报, 2019, 34(5): 1096-1105.
Han Xingbo, Jiang Xingliang, Bi Conglai, et al.Prediction of icing environment parameters based on decentralized rotating conductors[J]. Transactions of China Electrotechnical Society, 2019, 34(5): 1096-1105.
[24] Fu Ping, Farzaneh M, Bouchard G.Two-dimensional modelling of the ice accretion process on transmission line wires and conductors[J]. Cold Regions Science and Technology, 2006, 46(2): 132-146.