10kV地下排管电缆的分布式光纤在线测温技术的应用研究

On-line Temperature Monitoring of 10 kV Underground Cables-in-pipe Row Based on Distributed Optical Fiber Sensing Technology

在电力电缆监测中,温度是一个非常关键的参数,精确的、连续的温度数据对于电力电缆的工作状态监测、动态负荷测定、过热点报警和电缆管道的火灾监测等都具有非常重要的意义。笔者采用基于拉曼散射效应和拉曼光学时域反射测量技术的分布式光纤测温系统,对10kV地下排管敷设的电缆温度进行实时地、多测量点监测,获得了精确的点位温度值,可有效用于在线连续监测,为电缆载流量的确定提供了参考数据。

Temperature is a vital parameter in monitoring of power cables.Accurate and continuous temperature data are very important to working condition monitoring,dynamic load determination,overheating alarm,and fire forecast of the power cables.In this paper,the distributed temperature sensing （DTS） system based on Raman scattering effect and optic time domain reflection （OTDF） was applied in real-time temperature monitoring of 10 kV underground cables-in-pipe row,and the temperature data of the power cables were obtained accurately,which can be adopted as reference for determination of current carrying capacity of power cables.