【作者】 徐少波；

【导师】 车新生；

【作者基本信息】 沈阳工业大学 ， 测试计量技术及仪器， 2004， 硕士

【摘要】 随着社会经济和科学技术的高速发展，整个电力系统对高质量、高可靠性的电能供应提出了越来越高的要求。逐步实现电力系统的配电自动化、电气化、智能化，以提高整个配电系统的供电可靠性，其社会效益和经济效益都是非常明显的。本文的任务是对高压配电开关、高压配电设备、大功率变送器、高压电缆等电力系统中的绝缘和灭弧介质SF₆气体的密度实施在线监测，从而达到电力系统安全运行和经济实用的目的。 光纤传感器由于它的一系列独特的技术优越性而受到广泛应用。本文研究了SF₆的性质和论证了测量SF₆气体密度的重要性，在综述SF₆气体密度测量与光纤传感器的发展过程和现状的基础上，分析了现有的SF₆气体密度测量技术和方法所存在的一些弊端，指出它们的应用局限性。本文采用间接测量方法，通过光纤传输光信号对气体压力和温度实施在线监测，然后利用气体压力与温度的关系进行数学方法处理而最终得出的气体密度。这种方法具有设计合理、结构简单、防爆、耐腐蚀、防电磁干扰等优点，适用于在恶劣和危险的环境中应用。 本文研究了光纤温度测量系统中各主要组成部分的特性包括光纤的传输特性，从理论上分析了LED光源、光探测器、光电池及光纤耦合器的特性。根据实验条件合理的选择了信号光纤、光电池探测器、LED光源及其光纤耦合方式。并对温度测量所采用的光纤液体温度测量原理加以论述，且对采用方案为最合理方案进行了论证。设计了具体的LED光源的驱动电路，以及前置放大器、减法器等的具体电路。同时也给出了实验过程和结果，并对其进行了理论分析。更多还原

【Abstract】 With the development at a high speed of the social economy and science and technology, the whole power system put forward the higher and higher request to the electric energy of high quality, high dependability. Realize the distribution automation, electrification, intelligent of the power system progressively, In order to raise the power supply reliability of the whole distribution system, its social benefit and economic benefits are all very obvious. The task of this text is to monitor the density of killing the arc medium and insulation SF6 gas online in high pressure distribution switches, high pressure distribution equipment, high-power become person who give, high pressure cable, etc. Thus achieve the safe operation of power system and purpose with practical economy.The optic fiber sensor receives extensive application because of a series of unique technology superiority of it. Have studied SF6 of the nature and demonstrated importance of measuring the density of SF6 gas in this text, With the evolution and foundation of the current situation of optic fiber sensor and measurement of density of SF6 gas, Have analyzed some drawbacks that the existing density of SF6 gas measure technology and method, Point out their application limitation. This paper is by measuring the method indirectly, Transmit all signal through the optic fiber and monitor gas pressure and temperature, By utilizing relations gas pressure and temperature carry on mathematics method but produce density of gas finally. The method have rational design, structure simple, explosion-proof, able to bear corrode, merit of defending electromagnetism interfere etc, Suitable for the application in the abominable and dangerous environment.Have studied the characteristic of every main part including transmission characteristic of the optic fiber in the system of optic fiber temperature survey in this text; Have analyzed the characteristics of LED light source, photodetector, photocell and optic fiber coupling machine theoretically, According to experiment condition choose signal optic fiber, photocell detector, LED light source and coupling way of optic fiber rationally. And the principle of liquid temperature survey of optic fiber adopted to temperature survey is described, And have provedthat the scheme is the most rational. Have designed the concrete drive circuit of LED light sources and the concrete circuits of preamplifier and subtracter, etc. Experiment course and result have been given, and went on the theory to analyze.更多还原