高压电缆温度在线监测系统中热点位置研究

Hotspot Location of Surface Temperature On-line Monitoring System for High Voltage Cable

基于光纤的分布式温度测量系统是一种利用激光在光纤中的传播特性,实现实时测量空间温度场的技术。文章介绍了用于高压电缆表面温度测量的光纤测温系统,建立了高压电缆的热路模型,分析了不同位置表面温度对电缆线芯温度计算结果的影响,给出了不同排列方式下光纤安装位置的指导性意见。

The technology of distributed temperature sensing based on fiber is a new technique surveying the real-time distribution of spatial temperature pattern. This technology is based on the propagation characteristic of laser spreading in optical fiber. This paper introduced the distributed temperature sensing based on fiber which is used to monitor the surface temperature of high voltage cable, and gave out the thermal circuit model to calculate the temperature of cable core by surface temperature, and analyzed the effect on the calculation of cable core temperature by different hotspot on the cable surface, and gave out the guidance of the fiber position of different arrangement of cable.