中国电机工程学报2012，Vol.32Issue(18)：131-136,6.
大电机定子线棒光纤光栅准分布式测温技术
Quasi-distributed Temperature Measurements of Stator Bars Inside a Large Generators Based on Fiber Bragg Gratings
摘要
Abstract
This paper describes a multiplexed temperature measurement approach to monitor the inner temperature of stator bars in large power generators in real time via use of fiber Bragg gratings （FBG）. By embedding the optical fiber with multiple FBG into stator bars, the quasi-distributed measurement is realized. FBG are embedded at some positions closely related to temperature. Empirical results show that bare FBG are damaged easily, and their temperature features are affected easily by insulation materials. The FBG packaged by stainless steel capillaries can avoid damage from high temperature and pressure and force during being embedded into stator bars. The solid strand and position switching insulation are capable to be embedded FBG. The results of temperature experiments demonstrate that the FBG embedded into stator bars keep good characters. The coefficient between wavelength and temperature is 0.999 66. The wavelength-time response curves of the FBG coincide with temperature-time response curves of the thermocouples at the same position, and FBG sensors have the same response time to corresponding thermocouples. So the conclusion can be drawn that quasi-distributed temperature sensors based on FBG can monitor temperature inside the large power generators in real time.关键词
光纤布拉格光栅/温度传感器/准分布式测量/植入技术/封装/大电机/定子线棒Key words
fiber Bragg grating (FBG)/temperature sensor/quasi-distributed measurement/embedding technology/package/large generator/stator bar分类
信息技术与安全科学引用本文复制引用
王鹏,赵洪,满宇光,赫兟,孙玉田,刘杰..大电机定子线棒光纤光栅准分布式测温技术[J].中国电机工程学报,2012,32(18):131-136,6.基金项目
国家科技支撑计划项目 （）
黑龙江省自然科学基金项目 （）
