地下电缆光纤光栅测温试验  

Experimental Study on Temperature Measurement of Underground Cable by Fiber Bragg Grating

作　　者：付永长[1] 陈涛 张文斌[1] 魏志连[1] 唐建岗[1] 吕志盛 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]重庆电力科学试验研究院,重庆市渝北区401123

出　　处：《电网技术》2010年第5期212-215,共4页Power System Technology

摘　　要：电力电缆线路运行温度在线实时监测,能及时发现线路的局部过热点、检测运行线路的绝缘状态。为此设计了基于光纤光栅的电缆温度在线监测系统,实测了不同敷设方式下电缆的表皮温度;分析了电缆温度与环境温度以及线路负荷间的关系;采用等效热路法,由监测到的电缆表皮温度拟合出电缆的实际载流量,实现了对电缆温度及载流量的在线监测,确保电缆运行的安全性与经济性。On-line real-time temperature monitoring of power cable lines can find local overheating spot of cable line and detect insulation condition of lines being operated. Based on fiber Bragg grating, the authors develop an on-line temperature monitoring system for power cables and measure outer surface temperature of cables under different laying modes; analyze the relation among cable temperature, ambient temperature and load of cable lines. By means of equivalent thermal circuit method, the actual current-carrying capacity of cable is fitted by the monitored outer surface temperature of cable, thus the on-line monitoring of cable temperature and current-carrying capacity is implemented to ensure the security and economy of cable operation.

关 键 词：光纤光栅测温 电缆线路 电缆温度 载流量 环境温度 

分 类 号：TM83[电气工程—高电压与绝缘技术]