变压器绕组热点温度监测中光纤光栅传感器的应用研究

摘要

The hot-spot temperature on-line measurement for transformer winding has significant meaning for identi-fying the insulation condition of power transformer.In this paper, a novel temperature measurement method based on fiber grating is presented.The principle is introduced at first, and then the configuration and key technology of the temperature measurement system are discussed.Finally, aiming at different demands of the customers, different in-stallation structure are designed and tested.The testing results show that the proposed method is able to realize real-time measurement for the winding temperature changes, which will provide powerful support for the insulation condi-tion evaluation of power transformer.%电力变压器绕组热点温度的在线测量对于确保其安全稳定运行具有重要的意义。文章提出一种基于光纤光栅的绕组热点测温方法，首先简要介绍了测温方法的基本原理，之后对测温系统的结构及关键技术进行了讨论，最后针对不同用户的需求，设计了不同的安装结构，进行了实际测试。实测结果表明，系统能够实时测量绕组温度变化，可为变压器绝缘状况的评估将提供重要依据。