输电线路上振动强度与风速关系的探究
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摘要
输电线路受风、雨、雷电等外界环境的影响,其中风灾害最为严重,风对输电线路的影响最为频繁且持续时间较长。输电线路由于受到不同风速的影响,线路上的信号也会发生变化,振动强度是衡量线路上振动信号强弱的物理量。本文采用选取不同风速情况下的实验数据,通过数据处理观察振动强度随时间的变化,分析对比不同天气下相应振动强度的变化规律。结果显示,输电线路上振动强度随时间变化趋势与风速随时间变化整体趋势一致,有着很强的线性相关性。
There are many factors influenced the transmission line, such as wind, rain, thunder and lightning etc, among of these,wind is the most serious. The influence of wind is the most frequent and a longer duration. The different wind speed can lead to different signal on the transmission lines, vibration strength is a physical quantity to measure the strong and weak of the signal. The experimental data under different wind speeds is selected in this paper, observing the change of vibration strength along with time,and analyze the change rule of the corresponding vibration strength under the different weather. The result show that the overall trend of vibration strength is consistent with wind,and a strong linear correlation between them.
There are many factors influenced the transmission line, such as wind, rain, thunder and lightning etc, among of these,wind is the most serious. The influence of wind is the most frequent and a longer duration. The different wind speed can lead to different signal on the transmission lines, vibration strength is a physical quantity to measure the strong and weak of the signal. The experimental data under different wind speeds is selected in this paper, observing the change of vibration strength along with time,and analyze the change rule of the corresponding vibration strength under the different weather. The result show that the overall trend of vibration strength is consistent with wind,and a strong linear correlation between them.
引文
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[2]曹长胜.架空输电线路防舞动技术[J].贵州电力技术,2017,20(7):39-42.
[3]李淑东.风致架空输电线路振动特性分析[D].华北电力大学机械电子工程系, 2014.
[4]杨振华.大跨越输电线路微风振动分析[D].重庆大学, 2014.
[5]朱光荭.输电线微风振动与疲劳寿命[D].哈尔滨工业大学,2011.
[6]梁政平,王乘,孔德怡等,特高压架空输电线微风振动影响因素分析[J],水电能源科学,2008,26(3):185-188.
[7]叶志雄,李黎,江宜城,基于风速概率分布的防振锤安装位置计算[J],振动与冲击,2007, 10(26):60-63.
[8]殷惠君.大跨越输电线路的风振反映分析与振动控制[D].武汉理工大学,2003.
[9]孔德怡,李黎,龙晓鸿等,输电线路微风振动疲劳寿命影响因素分析[J],武汉理工大学学报,2010,32(20):53-57.
[10]李家园,大跨越特高强度输电线微风振动与疲劳寿命影响因素研究[D],三峡大学,2015.
[11]孟遂民,孔伟,架空输电线路设计[M],北京:中国电力出版社,2007:187-189.