SF_6局部放电分解产生SOF_2特征组分的光声光谱检测  

Photoacoustic Spectroscopy Detection of SOF_2 Characteristic Component Engendered in SF_6 Decomposition Under Partial Discharge

作　　者：裘吟君[1,2] 唐炬[1] 范敏[1,3] 刘岩[2] 袁静帆[2] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]海南电网公司,海口570100 [3]湖南省电力公司科学研究院,长沙410007

出　　处：《高电压技术》2013年第5期1163-1169,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724506);国家自然科学基金(5177181)~~

摘　　要：为了预防SF6气体绝缘设备早期绝缘缺陷,可通过检测SF6局部放电过程中产生的特征组分氟化亚硫酰(SOF2)体积分数大小和变化规律进行判断。针对SOF2传统检测法存在的不足,引入具有检测灵敏度高、不消耗被测气体、特别适用于在线监测等优点的光声光谱检测技术。利用宽频红外光源构建了一台用于检测SOF2的光声检测实验装置。并分析了其特性参数,获得了光声信号强度与SOF2体积分数之间的关系,得到了SOF2的最低检测限为4.6×10-6。与气象色谱仪的对比检测表明:光声检测法与气相色谱法的平均检测误差为5.9%。结果说明,所提光声检测装置能有效检测SOF2,并为最终研制SOF2光声光谱在线监测系统提供关键技术支撑。SOF2 is a kind of important characteristic component of SF6 decomposed gases which are engendered by partial discharge.Through detecting SOF2 gas concentration and its varying pattern,we can judge the early insulation fault of SF6 gas insulated equipment.Considering the shortages of traditional SOF2 detection methods,we introduce a photoacoustic method,which has the advantages such as high sensitivity,no gas loss,online monitoring and so on.A broadband infrared light source is utilized to form a photoacoustic detecting device for experiments of SOF2 detection.The characteristic parameters of SOF2 are analyzed on the basis of experimental results,and the relationship between the signal of photoacoustic spectroscopy and the concentration of SOF2 is obtained.The lowest detectable concentration of SOF2 is about 4.6×10-6.Compared with the method used gas chromatography,the average error of photoacoustic method is about 5.9%,which indicates that the proposed photoacoustic spectroscopy device is effective in SOF2 detection.The theoretical and experimental results provide a key technical support for the development of photoacoustic online SOF2-monitoring system.

关 键 词：氟化亚硫酰 光声光谱 在线监测 宽频红外光源 纵向共振光声池 最低检测限 

分 类 号：TM855[电气工程—高电压与绝缘技术]