分布式光纤载流量/温度安全监测系统的研究

针对电力电缆安全监测的应用需求,提出了一种以拉曼分布式光纤温度传感技术为核心的分布式光纤载流量/温度安全监测系统设计方法。该系统利用拉曼分布式光纤温度传感器对电网中的电力电缆线路的温度、载流量等运行状况进行全方位实时智能监测。试验结果表明,该系统可实现20km的电缆导体温度和载流量运行状态监测预警,计算导体温度与实测导体温度最大偏差不超过1℃,定位精度0.5m,采用有限元算法得到的电缆温度和电缆载流量的对应关系与实际情况基本吻合。

Research on distributed optic fiber carrying capacity and temperature security monitoring system

In order to meet the application requirements of power cable security monitoring, a design method of distributed Optic Fiber Carrying Capacity and temperature security monitoring system with Raman distributed fiber temperature sensing technology as core is proposed. This system uses Raman distributed fiber temperature sensor to monitor the temperature, the carrying capacity and other running status of the power cable line in the power grid in a real-time, intelligent and all-around way. The experiment shows that, the system can supervise the conductor′s temperature and carrying capacity′s running status of 20 km long power cable, and calculating the conductor′s temperature and actual measurement with the maximum deviation less than 1 ℃ and the locating accuracy is 0.5 m. Using finite element calculation, the correspondence of cable temperature and cable carrying capacity were obtained, which coincide with the actual condition.