The Study Of Temperature Monitoring System Of Electric Device Based On Optical-fiber Fluorescence

Nowadays it has been paid wide attention to realize temperature on-line real-time monitoring of electrical facilities, which has become an important task on the safe operation of power system. The optical fiber fluorescence temperature sensor is one of the interested problems that are researched in the field of modern optical fiber sensor technology. Because some situations of measuring temperature is special, It is possible to make some difficulties to measure temperature in these situations, so when people find the other temperature sensor to replace existing sensors, the optical fiber fluorescence temperature sensor is paid more and more attention because of its virtues. For example, electromagnetic interference resisting, little bulk, high voltage resisting and erode resisting.On the basis of thoroughly analysis and research about present situation at home and abroad, a system of on-line multi-channel real-time temperature monitoring of high voltage apparatus based on optical-fiber fluorescent lifetime has been designed, which can overcome the problem of temperature measurement under the numerous special environment of electric equipment in power system.The basic principle and characteristic of the method about fluorescence measurement are discussed, and the total scheme of fluorescence optical fiber temperature measurement system is designed. Lots of experiments focusing on the problem how to meet the requirement of industry field and secure the long time stability are done, and many experiment datas are given in the paper. The popular computer language visual C++ 6.0 is adopted to program the visual interface for the requirement of industry field. Finally, in the part of appendix of the paper, the problem how to realize multi-channel measurement in the system relating to the communication of light is further discussed. A multi-channel measurement system based on dynamic coupling is structured.The system of temperature monitoring based on optical fiber fluorescence studied in this paper has been made spot testing in a transformer substation, and the results is rectified by astandard instrument of thermocouple temperature measurement. The testing results shows that the system of temperature monitoring has fast response speed, and accurate alarming location when the temperature rises above alarming limit. The system can absolutely meet the requirement of industry field. It has high reliability, security and economization.