| 风速对基于BOTDA架空导线覆冰监测有效性的影响 |
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| 作者姓名： | 徐志钮 李先锋 郭一帆 赵丽娟 |
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| 作者单位： | 华北电力大学 电气与电子工程学院 河北 保定 071003,华北电力大学 电气与电子工程学院 河北 保定 071003,华北电力大学 电气与电子工程学院 河北 保定 071003,华北电力大学 电气与电子工程学院 河北 保定 071003 |
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| 基金项目： | 河北省自然科学基金资助项目(E2020502010)，国家自然科学基金(61775057)和中央高校基本科研业务费专项资金项目(2021MS072) |
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| 摘 要： | 为了获得架空导线温度在不同气象条件下的变化特征和风速对基于分布式光纤传感技术的架空导线覆冰监测有效性的影响，本文建立了光纤复合相线覆冰的温度场三维模型，并采用了有限元方法进行求解，分析获得了光纤温度在不同的环境温度、风速和覆冰厚度下的变化规律特征；指出了覆冰段与未覆冰段光纤的温差与环境温度初始值大小无关；提供了单独考虑环境温度变化速率或覆冰厚度情况下的临界风速表达式，给出了常见范围内环境温度变化速率以及覆冰厚度下的临界风速值，基于风速值和插值方法可以得到常见范围环境温度变化速率以及覆冰厚度下比较准确的临界风速。本文对研究覆冰架空导线在不同气象条件下的温度变化特征以及风速对基于分布式光纤传感的架空导线覆冰监测有效性的影响方面有着一定的学术和工程指导价值。
关键词：架空导线；覆冰识别；光纤传感；温度场；临界风速
中图分类号：TM755
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| 关 键 词： | 架空导线 覆冰识别 光纤传感 温度场 临界风速 |
| 收稿时间： | 2021/5/23 0:00:00 |
| 修稿时间： | 2021/7/10 0:00:00 |
Influence of wind speed on the effectiveness of monitoring of ice-covered overhead transmission line based on BOTDA |
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| Authors: | XU Zhiniu LI Xianfeng GUO Yifan ZHAO Lijuan |
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| Affiliation: | School of Electrical and Electronic Engineering,North China Electric Power University,School of Electrical and Electronic Engineering,North China Electric Power University,School of Electrical and Electronic Engineering,North China Electric Power University,School of Electrical and Electronic Engineering,North China Electric Power University |
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| Abstract: | In order to obtain the temperature variation characteristics of the overhead transmission line under different me-teorological conditions and the influence of wind speed on the effectiveness of the icing monitoring of the over-head transmission line based on the distributed optical fiber sensing technology, a 3D model of the ice-covered optical phase conductor in the temperature field is established, and with finite element analysis. In this paper, analyzed and obtained the characteristics of the variation law of the optical fiber temperature under different ambient temperature, wind speed and icing thickness. It is pointed out that the temperature difference between the optical fiber in the iced section and the optical fiber in the uniced section has nothing to do with the initial value of the ambient temperature, provided a critical wind speed expression considering the environmental tem-perature change rate or icing thickness alone, and given the critical wind speed value under the temperature change rate and icing thickness in the common range. Based on the wind speed value and interpolation, a more accurate critical wind speed expression can be measured under the ambient temperature change rate and ic-ing-thickness within the common range. Therefore, this paper has some academic and engineering guiding value in researching the temperature variation characteristics of icing overhead transmission lines under different me-teorological conditions and the influence of wind speed on the effectiveness of overhead transmission line icing monitoring based on distributed optical fiber sensing technology.
Keywords: Overhead transmission line; ice-coating identification; optical fiber sensing; temperature field; critical wind speed |
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| Keywords: | Overhead transmission line ice-coating identification optical fiber sensing temperature field critical wind speed |
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