电工技术学报  2022, Vol. 37 Issue (17): 4508-4516    DOI: 10.19595/j.cnki.1000-6753.tces.211098
高电压与放电 |
输电线路单导线覆冰和扭转的相互影响机制分析
韩兴波1, 吴海涛2, 郭思华2, 蒋兴良3, 王钰洁4
1.交通工程应用机器人重庆市工程试验室(重庆交通大学) 重庆 400074;
2.国网重庆市电力公司电力科学研究院 重庆 401123;
3.输配电装备及系统安全与新技术国家重点试验室(重庆大学) 重庆 400044;
4.重庆交通大学机电与车辆工程学院 重庆 400074
Analysis of Interaction Mechanism between Icing and Torsion of Single Transmission Lines
Han Xingbo1, Wu Haitao2, Guo Sihua2, Jiang Xingliang3, Wang Yujie4
1. Chongqing Engineering Laboratory for Transportation Engineering Application Robot Chongqing Jiaotong University Chongqing 400074 China;
2.State Grid Chongqing Electric Power Company Chongqing Electric Power Research Institute Chongqing 401123 China;
3. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China;
4. School of Mechatronics and Vehicle Engineering Chongqing Jiaotong University Chongqing 400074 China
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摘要 覆冰威胁输电线路的安全稳定运行,准确地预测导线覆冰增长是输电线路防冰减灾工作的基础。导线覆冰增长一般都伴随着导线的扭转过程,扭转和覆冰增长的相互影响使得导线各个位置覆冰速率不同、冰形更为多样复杂。为提高导线覆冰数值计算的准确度,该文从流体力学和导线扭转基本力学出发,综合考虑导线各处扭转角度的差异和扭转冰形对空气中过冷却水滴扰流特性的影响,建立了导线覆冰扭转动态数值计算模型。通过仿真计算重点分析了三种不同型号的导线不同位置覆冰后扭转角度的变化规律,以及导线扭转对覆冰增长的影响特性。结果表明:覆冰后,导线扭转角度从两端向中心逐渐增大;相对于未扭转,导线扭转条件下的水滴碰撞范围更大,覆冰速率更快;导线端部和中心位置覆冰形态差异较大,导线端部扭转角度较小,覆冰趋于翼形;导线中部扭转角度大,覆冰趋于圆筒形,风速和空气中水滴中值体积直径较大时,大直径导线在扭转条件下的覆冰增长速率更快。
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关键词 导线覆冰扭转    
Abstract:Icing threatens the safe and stable operation of transmission lines. Accurate prediction of the icing process of conductor can help the work of anti-icing and disaster reduction of transmission lines. Generally, the icing of conductor is accompanied by the torsion process of conductor. Because of the interaction of conductor torsion and icing, there is a big difference of the icing shape and rate between different positions on conductors. In order to improve the accuracy of numerical calculation of conductor icing, a dynamic numerical calculation model of conductor icing torsion is established based on hydrodynamics and basic mechanics of conductor torsion in this paper. Comprehensively, the model takes the effects of torsion angles and torsion icing shapes on the icing process of conductor into consideration, including the effects on the trajectories of water droplets in the air. Through the simulation, the change law of torsion of three different types of conductors after icing at different positions and the influence of conductor torsion on icing are analyzed. The results show that the torsion angle of the conductor increases from both ends to the center after icing; compared with the untwisted conductor, the droplet collision range and icing rate of the twisted conductor are larger; and there is a great difference between the icing shape at the end and the center of twisted conductors. The icing shape at the end of conductors tends to be wing shaped while the icing shape tends to be a cylinder at the middle. When the wind velocity and the median volume diameter of water droplets are both large, the icing rate of conductors with a larger diameter under torsion condition is faster.
Key wordsConductor    icing    torsion   
收稿日期: 2021-07-19     
PACS: TM85  
基金资助:交通工程应用机器人重庆市工程试验室开放基金(CELTEAR-KFKT-202106)、重庆市教育委员会科学技术研究计划项目(KJQN202000727)和国家自然科学基金重点项目(51637002)资助
通讯作者: 韩兴波 男,1992 年生,博士研究生, 研究方向为复杂大气环境下输电线路外绝缘及防护。E-mail:hanxingbocqu@163.com   
作者简介: 吴海涛 男,1991年生,硕士,工程师, 研究方向为架空输电线路运检、在线监测、故障诊断等。E-mail:978201734@qq.com
引用本文:   
韩兴波, 吴海涛, 郭思华, 蒋兴良, 王钰洁. 输电线路单导线覆冰和扭转的相互影响机制分析[J]. 电工技术学报, 2022, 37(17): 4508-4516. Han Xingbo, Wu Haitao, Guo Sihua, Jiang Xingliang, Wang Yujie. Analysis of Interaction Mechanism between Icing and Torsion of Single Transmission Lines. Transactions of China Electrotechnical Society, 2022, 37(17): 4508-4516.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.211098          https://dgjsxb.ces-transaction.com/CN/Y2022/V37/I17/4508