基于光纤传感稳态热容平衡模型的架空线路导线温度监测  

Temperature Monitoring of Overhead Line Conductor Based on Optical Fiber Sensing Steady-State Heat Capacity Balance Model

作　　者：王亚鸽 房明磊 李成龙 WANG Yage;FANG Minglei;LI Chenglong(College of Mechanics and Photoelectric Physics,Anhui University of Science and Technology,Huainan Anhui 232001,China;School of Mathematics and Big Data,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001 [2]安徽理工大学数学与大数据学院,安徽淮南232001

出　　处：《传感技术学报》2024年第1期171-176,共6页Chinese Journal of Sensors and Actuators

基　　金：安徽省高校自然科学基金项目(KJ2021A0451)。

摘　　要：架空线路温度监测过程中,受环境温度、日照等因素的影响,导致其监测数据失真,降低监测准确度。提出基于光纤传感器的架空线路导线温度监测方法。建立架空线路导线的稳态热容平衡模型,分析影响导线温度相关因素。通过光纤温度传感器得到热膨胀的反应系数,计算求得光纤布拉格光栅对温度变化的灵敏度系数,构建传感稳态热平衡方程。结合环境温度、风速和日照辐射等参数,利用导线温升公式计算出传感导线各部位热阻值,获得相对应温度监测数据,实现架空线路导线温度监测。实验结果表明,所提方法在不影响线路正常运行情况下,实验测得导线上表面、侧方位和下表面的温度分别为27.8℃、26.6℃和23.4℃,温度监测准确,误差小。In the process of overhead line temperature monitoring,due to the influence of environmental temperature,sunshine and other factors,the monitoring data is distorted and the monitoring accuracy is reduced.A temperature monitoring method for overhead line con-ductor based on optical fiber sensor is proposed.The steady-state heat capacity balance model of overhead line conductor is established,and the factors affecting conductor temperature are analyzed.The response coefficient of thermal expansion is obtained through the fiber temperature sensor,the sensitivity coefficient of fiber Bragg grating to temperature change is calculated,and the sensing steady-state thermal balance equation is constructed.Combined with the parameters such as ambient temperature,wind speed and sunlight radiation,the thermal resistance of each part of the sensing conductor is calculated by using the conductor temperature rise formula,and the corre-sponding temperature monitoring data are obtained to realize the overhead line conductor temperature monitoring.The experimental re-sults show that,without affecting the normal operation of the line,the temperatures of the upper surface,the side orientation and the low-er surface of the conductor measured by using the proposed method are 27.8℃,26.6℃and 23.4℃respectively.The temperature mo-nitoring is accurate and the error is small.

关 键 词：光纤传感器 架空线路监测 导线温度检测 光纤光栅 线路结构 

分 类 号：TM74[电气工程—电力系统及自动化]