分布式光纤传感技术在电力电缆监测的应用

为了保证电力电缆的安全问题,电力电缆的温度监测十分关键。针对目前一些光纤测温产品的不足,提出了一种长距离分布式光纤传感器,其具有测量灵敏度高、响应速度快、误报率低、测量长度大、工作稳定等优点。该传感器基于布里渊光时域反射原理,构造了用于实时监测的分布式光纤测试系统。对该系统的性能进行了检测实验,实验验证该测温系统测温精度误差范围在±0.50C左右,且具有很好的稳定性,同时,定位精度很高,可以准确的定位故障点,以此可以避免电缆事故的发生。

Application of Distributed Opitical Fiber Sensing Technology to Power Cable

In order to ensure the safety of electrical cables, temperature monitoring for power cables is critical. For the weak points of existing perimeter security alarm products, the distributed optical fiber sensor is researched which boasts high sensitivity measurement, fast response, low false alarm rate, long measuring length. The sensor is based on the principle of Brillouin optical time domain reflectometer. The testing system of distributed optical fiber is constructed for real-time monitoring. The performance of the system is tested, which verifies the measurement accuracy of the system is about ±0.5℃ with good stability, while the positioning function can accurately locate the fault point to avoid cable accidents.