采用热释电原理检测SF_(6)气体中CO体积分数的方法与应用  

Method and Application of Detecting CO Content in SF_(6) Gas by Pyroelectric Principle

作　　者：鲁旭臣 李爽 刘佳鑫 毕海涛 郎业兴 王雅楠 丁五行 LU Xuchen;LI Shuang;LIU Jiaxin;BI Haitao;LANG Yexing;WANG Yanan;DING Wuxing(State Grid Liaoning Electric Power Co.,Ltd.Research Institute,Shenyang 110006,China;T&P Union(Beijing)Co.,Ltd.,Beijing 100096,China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,沈阳110006 [2]泰普联合科技开发(北京)有限公司,北京100096

出　　处：《高压电器》2024年第9期197-205,共9页High Voltage Apparatus

基　　金：国网辽宁省电力有限公司管理科技资助项目(2021YF-59)。

摘　　要：高压电气设备SF_(6)绝缘气室中的发热故障会导致从绝缘材料中析出CO气体,因此,SF_(6)绝缘气室中CO气体体积分数变化可作为判断绝缘气室发热故障程度的依据之一。文中研究采用热释电原理检测SF_(6)气体中CO体积分数的方法,并采用该方法设计开发一种CO热释电光谱传感器:采用折叠光程,理论检出限为1.99μL/L。采用该光谱传感器可实现高压电气设备SF_(6)绝缘气室发热故障的无损在线监测,也可将该光谱传感器取代CO电化学传感器安装在便携式仪器中以克服采用电化学传感器检测CO、H_(2)两种兼容气体并存时的交叉干扰,确保对CO、H_(2)的准确测量。The thermal fault of the SF_(6)insulating gas chamber of high-voltage electrical equipment can lead to the extraction of CO gas from the insulating material,so the change of CO gas concentration in the SF_(6)insulating gas chamber can be used as one of the bases to determine the degree of thermal fault of the insulating gas chamber.In this paper,a method of detecting CO content in SF_(6)gas using pyroelectricity principle is studied,and a CO pyroelectricity spectrum sensor is designed and developed by this method.The sensor uses a folded optical path with a theoretical detection limit of 1.99μL/L.The sensor can be used to realize the on-line monitoring of the thermal fault without gas loss in the SF_(6)insulating gas chamber of high-voltage electrical equipment,and the sensor can be installed in portable instrument instead of CO electrochemical sensor to overcome cross-interference when using electrochemical sensor to detect co-existence of CO and H_(2)compatible gases,and to ensure accurate measurement of CO and H_(2).

关 键 词：SF_(6)绝缘气室发热故障 热释电原理CO检测 SF_(6)绝缘气室无损在线监测 电化学传感器法SF_(6)气体杂质检测 交叉干扰扣除 

分 类 号：TM213[一般工业技术—材料科学与工程]