光纤Bragg光栅温度传感器在硅橡胶绝缘子温度特性研究中的应用

摘要

当硅橡胶绝缘子长期工作在恶劣的环境中时,会导致硅橡胶绝缘子产生发热现象.为了检测硅橡胶绝缘子的工作温度,将光纤Bragg光栅分别粘贴于硅橡胶绝缘子的上、下两端和伞群部分.温度特性实验结果表明:在15 kV电压作用下,硅橡胶绝缘子温度发生变化,从而使得光纤Bragg光栅中心波长产生相应的移位.金属棒上、下两端和伞群部分在无污染情况下温升分别为1.8℃、2.1℃和0.5℃；在凝露情况下温升分别为2.3℃、2.7℃和0.7 ℃；在Ⅱ级污秽等级情况下温升分别为3.5℃、4.1℃和0.9℃；破坏后的伞群部分在三种情况下的温升分别为4.9℃、5.5℃和7.1℃.光纤Bragg光栅温度传感器可有效的检测硅橡胶绝缘子的工作温度,反映硅橡胶绝缘子的工作状态.%When silicon rubber insulator operates in a harsh environment for a long time,it will cause and lead to heating phenomenon.In order to detect the working temperature of the silicon rubber insulator,the optical fiber Bragg gratings are installed respectively on the top,bottom and the umbrella group of silicon rubber insulator.Temperature characteristics experimental results show that,in the interaction of the voltage 15 kV,the temperature of silicon rubber insulator will be changed,which makes the center wavelength of the optical fiber Bragg gratings shift.The temperature of the three parts respectively rise 1.8 ℃,2.1 ℃ and 0.5 ℃ in pollution-free case,2.3 ℃,2.7 ℃ and 0.7 ℃ in gel case,3.5 ℃,4.1 ℃ and 0.9 ℃ in level Ⅱ filthy case.The temperature of the destroyed umbrella group respectively rise 4.9 ℃,5.5 ℃ and 7.1 ℃ in three cases.Therefore,by using optical fiber Bragg grating temperature sensor to detect the change of silicon rubber insulator's temperature,combined with the research of temperature characteristic,can directly reflect the silicon rubber insulator's working situation.