油浸式电力变压器绕组温度场监测研究

Monitoring Based on FBG sensing of oil-immersed power transformer winding temperature field

介绍变压器绕组热点温度的在线实时监测,对变压器的安全运行和工作寿命具有重要意义。通过ANSYS有限元分析,仿真得到绕组的热点位置和温升范围,将一种聚四氟乙烯材料作底板的FBG传感器通过匝间的垫片安装于绕组的热点位置。通过光栅窄带滤波反射后,解调拟合出光波长,通过数学模型计算得到热点温度。采集数据显示,测得绕组热点温度分别是143.2℃,通过与仿真结果333.4K对比,能够及时在线的反映出绕组的热点温度,为变压器的安全运行提供重要的参考数据。

Transformer winding hot spot temperature in the online real-time monitoring. By ANSYS finite element analysis, the simulated temperature range winding hot spot location and will make the floor of a PTFE shim between turns by FBG sensor is mounted on the winding hot spot location. By narrowband filtering reflection grating, the demodulation fitting optical wavelength, calculated by mathematical models hot temperatures. Collecting data, measured winding hot spot temperature are 143.2 ℃, and simulation results 333.4K by contrast, can be timely to reflect winding hot spot temperature line, and provide important reference data for safe operation of the transformer.