摘要
分布式光纤测温系统在电力行业电缆温度监测中发挥着重要的作用。本文介绍了光纤拉曼散射测温基本原理和基于光时域反射(OTDR)定位原理。以青岛供电公司二回三相4 km长电缆温度监测工程为例,介绍了光缆的选择、系统功能和监测情况。经综合分析,系统温度精度为±1℃,距离定位精度±2 m,为电缆温度实时监测和输电安全提供了科学依据。
Distributed fiber optic temperature sensing （DTS） system is important in the surveillance of cable temperature. This paper presents the principles of the Raman back-scattering effect based temperature sensing and the OTDR （Optical Time-Domain Reflectometry） based positioning. We take the temperature surveillance system of a 4 km electrical cable of Qingdao as an instance, in which we present the selection of optical cable and system functionalities. Its temperature precision is ±1℃ and location accuracy is ±2 m so it provides the scientific basis for the surveillance of cable temperature and the safety of electric distribution.
出处
《山东科学》
CAS
2008年第6期50-54,共5页
Shandong Science
基金
国家高技术研究发展计划(863计划)项目(2006AA06Z213)
山东省科技攻关计划项目(2006[93])
