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基于多点分布式光纤光栅的GIS隔离开关触头温度在线监测技术

, PP. 298-306

Keywords: GIS,触头温度,多点分布式,光纤光栅,有限元模型,神经网络算法

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Abstract:

GIS设备导体触头温升过高会引发重大事故,光纤光栅技术在电气设备温度在线监测方面具有广泛的应用前景.针对光纤光栅温度传感器无法直接安装在导体触头表面进行温度测量的难题,提出了一种基于测量多点外壳温度及环境温度,从而间接计算导体触头温度的方法.建立了单相GIS隔离开关三维有限元计算模型,得到GIS内部温度分布规律,确定了多个光纤光栅温度传感器的最优安装位置.进行GIS隔离开关温升实验,将实验数据与仿真结果进行了比较,验证了仿真计算模型的准确性.最后利用人工神经网络算法对环境温度,外壳温度和导体触头温度进行了曲线拟合,计算结果与实测数据对比表明本方法具有较高准确度.该在线测温方法简单有效,无需破坏现有GIS设备的结构,具有较好的应用前景.

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