FBG传感器检测电缆中间接头局部放电的温升研究  

Temperature-rising research of cable middle joint with partial discharge measured by FBG sensor

作　　者：田雷[1] 徐树振[1] 陈炎峰 赵振刚[1] 李英娜[1] 李川[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《传感器与微系统》2013年第12期64-66,共3页Transducer and Microsystem Technologies

摘　　要：为及时发现电缆接头的故障隐患,研制了一种安装在冷缩绝缘管中间带铜环的光纤Bragg光栅(FBG)温度传感器,将其应用于3+1芯、额定电压为1kV、横截面积为25mm2的XLPE电缆冷缩中间接头的温度监测。当供电电压分别为5,15 kV时,加电40 min,有毛刺的中间接头因局部场强升高出现局部放电现象,比正常的中间接头温度分别高2.45,4.31℃。试验结果表明:该传感器能有效监测中间接头的温度,为中间接头是否健康运行提供依据。A fiber Bragg grating （FBG）temperature sensor with copper ring mounted on the middle of cold contracting insulation tube is developed in order to timely detect fault of cable joint. The sensor is applied to monitor temperature of middle joint made by XLPE cable of 3 ＋ 1 core with the rated voltage of 1 kV, cross-section area is 25 mm2. When supply voltage is 5,15 kV within 40 min, temperature of middle joint with burr is 2.45, 4.31 ~C higher than temperature of normal middle joints because partial discharge phenomenon is caused by increasing of local field strength. The experimental results indicate that this sensor can effectively monitor the temperature of the middle joints and provide important evidence for the normal work of the middle joints.

关 键 词：光纤Bragg光栅(FBG)温度传感器 电缆中间接头 局部放电 

分 类 号：TH89[机械工程—仪器科学与技术]