基于光纤网的光缆线路温度突变定位方法研究

Research on Temperature Mutation Location Method of Optical Cable Line Based on Optical Fiber Network

摘要: 光缆线路的正常运行是保障电力系统安全稳定运行的重要条件，及时掌握光缆线路的温度状态，是保证电缆安全温度的基本前提。光时域反射原理(OTDR)主要测量光纤的功率损耗，如果光缆温度存在很大波动，则这些数量会受到很大影响。因此本文首先构建了基于光纤传感网的光缆线路温度监测系统架构，接着研究了光纤传感温度检测技术，并建立了包含传感子系统、数据采集处理子系统以及智能终端子系统的光缆线路温度定位系统，最后本文基于小波突变检测算法，结合研究的光缆线路温度突变监测系统对云南省某变电站进行仿真分析，为实现对光缆安全评定管理奠定基础。

Abstract: The normal operation of optical fiber cable is an important condition to ensure the safe and stable operation of power system. It is important to grasp the real-time operating status of the optical fiber line in time. The Optical Time Domain Reflectometry (OTDR) is a technique for studying the quality of optical fibers. It mainly measures the power loss and reflection characteristics of optical fibers. If there are fiber faults (fiber breaks, bends, connectors, and connectors), these numbers can be greatly affected. Therefore, OTDR equipment can be used to locate fiber faults. At the same time, this paper also introduces the principle of wavelet transform to detect the noise and singularity of the signal collected by OTDR. Based on the above principles, an optical fiber fault location system is designed, which can be divided into three levels: a front-end hardware detection device, an intermediate data processing center, and an intelligent terminal installed with an optical cable fault location system.