摘要
通过Matlab仿真分析,建立变压器绕组热路模型,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光纤Bragg光栅(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,测得绕组热点温度在额定功率实测为71℃,仿真结果为71.8℃;1.3倍功率实测温度为73℃,仿真结果为73.6℃。通过对比,能够及时在线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。
By Matlab simulation analysis,thermal circuit model for transformer winding is set up,to obtain hot point location and temperature-rising range of winding,FBG sensor using Teflon material as substrate is installed in winding hotspot locations via gasket between turns. After reflection by narrowband filtering of grating,demodulate and fit optical wavelength,calculate by mathematical models to obtain hot spot temperature. Collected data show that the measured winding hot spot temperature is measured as 71 ℃ at rated power,the simulation results is71. 8 ℃; the measured temperature is 73 ℃ at 1. 3 times the power,the simulation results is 73. 6 ℃. Hot spot temperature of winding,can be reflected in time and on-line by comparing provide important reference data for safe operation of transformer.
出处
《传感器与微系统》
CSCD
2016年第7期51-54,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(51567013)
昆明理工大学人才培养基金资助项目(KKSY201303004)
云南省应用基础研究计划资助项目(2013FZ021)
中国博士后科学基金面上资助(一等资助)项目(2014M552552XB)
关键词
变压器绕组
热路模型
温度场
热点温度
光纤BRAGG光栅
transformer winding
thermal circuit model
temperature field
hot spot temperature
fiber Bragg grating（FBG）
