基于激光吸收光谱的SF6/N2混合气分解产物同时检测  

Simultaneous Detection of SF6/N2 Mixture Decomposition Based on Laser Absorption Spectroscopy

作　　者：张爽[1] 江翼[2] 姜萌[3] 张静[2] 黄勤清 杨旭[2] 周文[2] ZHANG Shuang;JIANG Yi;JIANG Meng;ZHANG Jing;HUANG Qin-qing;YANG Xu;ZHOU Wen(Electrical and Electronic Engineering College,Wuhan Institute of Shipbuilding Technology,Wuhan 430050,China;State Gird Electric Power Research Institute Wuhan NARI Limited Liability Company,Wuhan 430074,China;Institute of Beijing Aerospace Control Devices(Fiber Sensing System Engineering Technology Research Center of Beijing),Beijing 100854,China)

机构地区：[1]武汉船舶职业技术学院电气与电子工程学院,湖北武汉430050 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [3]北京航天控制仪器研究所(北京市光纤传感系统工程技术研究中心),北京100854

出　　处：《仪表技术与传感器》2020年第9期69-72,共4页Instrument Technique and Sensor

基　　金：国家电网有限公司总部科技项目(52240016000A)。

摘　　要：针对SF6分解气中H2S、CO、HF等3种气体进行在线监测,研制基于激光吸收光谱的SF6分解气在线监测装置,提出采用时分复用的方案实现多组分气体同时测量,对激光器的波长参数进行分析并测试。针对近红外波段CO和H2S气体吸收谱线弱的问题,提出独立放大电路方案,研制样机并通入混合组分气体进行验证。根据获得二次谐波曲线和浓度随时间变化曲线表明,该系统目前可以实现的检测限为CO 10 ppm,H2S 4 ppm,HF 1 ppm,可以满足高灵敏度SF6分解气在线监测和故障预警需求。Online monitoring was conducted for H2S,CO,HF and other three gases in SF6 decomposed gas,an on-line moni-toring device of SF6 decomposition gas based on laser absorption spectroscopy was developed,and a scheme of time division multi-plexing was proposed to realize simultaneous measurement of multi-components gases.The wavelength parameters of the laser were analyzed and tested.To solve the problem of weak absorption lines of CO and H2S in the near infrared band,an independent am-plification circuit scheme was proposed.The prototype was developed and verified by mixing component gases.According to the ob-tained second harmonic curves and concentration change curves with time,the detection limits of this system can be achieved at present are CO 10 ppm,H2S 4 ppm and HF 1 ppm,which can meet the needs of online monitoring and warning in power industry.

关 键 词：SF6分解气 激光吸收光谱 H2S CO HF 检测限 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]