摘要
针对电力电缆在线运行中潜在故障难以检测和目前故障处理手段滞后性问题,提出采用基于拉曼散射分布式光纤温度传感系统用于电力电缆本体的温度在线检测方法。首先,描述了测温光纤在电力电缆中敷设的方式,然后根据拉曼散射基本原理分析了拉曼散射反斯托克斯光与斯托克斯光比值与温度分布的关系,并给出了光时域反射距离定位解析表达式。根据拉曼散射原理设计了用于电缆测温光纤的分布式光纤测温解调系统,通过对1km长实验光纤进行人为局部点升温实验证明该分布式光纤测温系统可实现沿长度方向局部点的温度测量和定位。最后给出本文设计测温系统的性能指标,可用于电力电缆本体全线在线温度监测。
A distributed optical fiber temperature measurement system was designed to detect power cable potential fault and solve processing methods lag. The laying method was described in this paper. The relationship between anti-Stokes light/ Stokes light and temperature was analyzed on the basis of Raman scattering principle. The analytical expression of distance was described in accordance to optical time domain reflect theory. The distributed optical fiber temperature demodulation system was designed. Experimental investigation showed that temperature and positional information were obtained from the temperature measurement system. Performance index of the system were shown at last, and the distributed optical fiber temperature measurement system monitoring system could be used for power cable temperature monitoring.
出处
《广东电力》
2013年第5期23-26,33,共5页
Guangdong Electric Power
关键词
电缆故障监测
分布式光纤测温
拉曼散射
光时域反射
在线监测
power cable faults detectation
distributed optical fiber temperature measurement Raman scatting
optical timedomain reflect
on-line monitoring
