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| 覆冰分裂导线扭转刚度研究 |
| Study on Iced Bundle conductors Torsional Stiffness |
| 投稿时间：2016-07-11 修订日期：2016-08-12 |
| DOI： |
| 中文关键词: 扭转刚度 输电线路 覆冰形状 偏心 |
| 英文关键词: torsional stiffness transmission line ice shape eccentricity |
| 基金项目:创新研究群体科学基金；高等学校学科创新引智计划 |
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| 中文摘要: |
| 因分裂导线覆冰而导致的扭转刚度变化是舞动发生的重要原因之一，为了有效防治舞动，研究覆冰分裂导线扭转刚度很有必要。本文提出了一种考虑覆冰偏心的分裂导线覆冰扭转刚度计算方法，分析了覆冰对扭转刚度的影响。计算结果表明：覆冰导线的扭转刚度随覆冰量的增大而增大；常见易引发舞动的冰形中，扇形覆冰的偏心影响最大；覆冰偏心对扭转刚度有影响，初始结冰角越大，扭转刚度越大；受覆冰偏心的影响，覆冰导线在顺时针与逆时针的扭转刚度基本相同，但临界扭转角和临界扭矩不同；不均匀覆冰会对分裂导线的扭转刚度产生显著影响。本文所得结果对舞动的防治可提供参考。 |
| 英文摘要: |
| The torsional stiffness changed by ice on the bundle conductor is one of the important reasons for galloping. In order to prevent and control transmission line galloping, it is very necessary to study on torsional stiffness of iced bundle conductor. This paper proposes a new method to calculate the torsional stiffness of iced bundled conductors with consideration for the eccentricity of ice, and the effect of ice on torsional stiffness are discussed. The result shows that the torsional stiffness of iced conductors increases with the increase of ice. Among the common ice shape which can cause galloping, the eccentricity of sector ice have the greatest impact on torsional stiffness. Under the influence of the icing eccentricity, the torsion stiffness of the iced conductor is basically the same as that under the clockwise and anti-clockwise torque, but the critical torsional angle and the critical torque are different. Uneven ice have significant effect on torsion stiffness. The obtained results can provide a reference for preventing and controlling galloping. |
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