【作者】 孟庆民；

【导师】 吴乐南；

【作者基本信息】 东南大学 ， 信号与信息处理， 2005， 硕士

【摘要】 由于高压开关的触点和母线处于高电位,每相对地和不同相之间都存在很高的电压,所以直接检测高压开关触点和母线的温度一直是电力系统检测中的难题。本文针对当前电力系统的实际情况及需要提出了一种简单可行的测温新方法:位移光强度调制型光纤温度传感器,并对传感头的结构进行了设计。实验结果表明,该方案是可行的。该测量系统具有良好的电绝缘性和抗电磁干扰的能力,而且测温元件尺寸小,整个系统结构简单,成本低,安装方便。论文的第一章分析了课题的研究背景,提出了光纤温度传感器用于高压开关在线监测的方案。第二章对光纤温度传感器的基本原理作了介绍,重点讨论和分析了光纤、光源和光电探测器的原理及性能,以及强度调制型光纤温度传感器的原理,它们是光纤传感器的重要组成部分,对测温系统的稳定性和测量精度具有重要的作用。第三章通过分析、比较并结合实际条件,提出了遮光式光纤温度传感探头的具体设计方案,同时,介绍了系统采用的光路补偿技术的原理。第四章详细描述了整个监测系统的设计与实现。硬件方面,较详细地介绍了所用元件的性能和原理;软件方面,给出了系统实现的程序流程图。第五章对系统进行了测温实验,验证了本系统理论的正确性和工程的可行性。最后,进行了全文的总结和展望。更多还原

【Abstract】 The very high voltage between the contacts of high-voltage switch or between high-voltage buses makes the direct measurement of its temperature a very difficult problem which has not been solved in practice so far. Based on the fact of electric power system, this paper introduces a new simple method: displace-intensity modulated fiber-optic temperature sensor. Its feasibility is proved via experiments. The sensor is an insulator itself and is small, so it has the advantages of low-price, simple-structure, and without electromagnetic interference.At the beginning, the dissertation analyzes the background about the research of the problem, and gives a project to solve it.The principle and performance of the fiber, lamp-house, photoelectric detector is discussed in detailsin chapter 2. And the principle of the intensity modulated fiber-optic sensor is given. They are important parts of the fiber–optic sensor, and affect the stability and precision of the system.In chapter 3, the paper brings forward an idiographic project through analysis, compare, and combined with practice. At the same time, the knowledge about double optical path compensation is discussed too.In chapter 4, the paper mainly introduces the realizations of the system, included the principle and performance of the parts which needed, and software flow chart.In chapter 5, the dissertation validates academic validity and project feasibility through experiments.Finally, the paper gives summarization and expectation.更多还原