双通道气相色谱-脉冲氦离子化检测器对SF_6电力设备中17种气体组分的检测  

Qualitative and Quantitative Determination of 17 Gases from SF_6 Electrical Equipments by Dual-Channel Gas Chromatography-Pulsed Discharge Helium Ionization Detector

作　　者：周永言[1] 谢頔 唐念[1] 栾天罡[2] 李丽[1] 王晓玮[3] 

机构地区：[1]广东电网公司电力科学研究院环保所,广东广州510275 [2]中山大学生命科学学院,广东广州510275 [3]中山大学海洋学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2015年第3期74-79,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(21307167);教育部博士点基金资助项目(20130171120038)

摘　　要：基于SF6等气体组分分析在电气设备故障/缺陷诊断中的显著作用,采用双通道气相色谱-脉冲氦离子化检测器（GC-PDHID）建立了SF6电力设备中17种常见的气体组分（CO、CF4、CH4、CO2、C2F6、C2H2、COS、C2H4、C2H8、H2S、SO2F2、C3F8、C3H6、C3H8、CS2、SO2、S2OF10）的定性定量分析方法。结果发现,通过采用双通道气相色谱的方法将不同的气体组分切换到由0.5 nm柱和Poropak Q柱组成的通道A以及由HP-5毛细管柱组成的通道B,17种气体中除了C2H4与C2H6、C3H6与C3H8无法分离外,其余各组分均得到的良好的分离。同时,PDHID对这17种气体进行检测,结果表明,17种气体的峰面积的相对标准偏差（RSD）小于7%,检出限（LOD）为10-8（SO2F2）~10-6（CO2）。该方法重现性好,灵敏度高,适用于对该15种气体进行定性定量分析。用以上的方法对气体绝缘开关设备（GIS）中气体组分进行分析,检测到N2、O2、CO2、CF4、SO2、SO2F2等。其中,SO2和SO2F2的检出说明该GIS设备内可能发生了火花放电。The qualitative and quantitative determination of gases released from SF6 electrical equipments plays an important role in diagnosing the failure of SF6 electric equipments. In this work,17 gases were determined based on a dual-channel gas chromatography（ GC） equipped with a helium ionization detector in GIS（ Gas Insulated Switchgear）,including CO,CF4,CH4,CO2,C2F6,C2H2,COS,C2H4,C2H8,H2 S,SO2F2,C3F8,C3H6,C3H8,CS2,SO2 and S2OF10. Gases were transported into channel A and channel B of the instrument. Channel A was composed of a 0. 5 nm column and a Poropak Q column while channel B was made up of HP-5 capillary chromatographic column. As a result,target compounds could be separated completely. Moreover,the limit of detection（ LOD） of these gases was approximate10- 8and the relative standard deviation（ RSD） was less than 7%. Therefore,the proposed method was sensitive,precise and was finally applied to determine 15 gases in real samples from GIS. SO2 and SO2F2could be detected in the GIS,which indicated the spark discharge inside the equipment.

关 键 词：SF6电力设备气体组分 气相色谱法(GC) 脉冲氦离子化检测器(PDHID) 

分 类 号：O657[理学—分析化学] X831[理学—化学]