Development of a Cold Trap-Photoelectron Ionization Time-of-flight Mass Spectrometer for Detection of Trace SF6 Gas Decomposition Products

被引：0

作者：

Liu C.-Y. ^{[1
]}

Han F.-Y. ^{[1
]}

Tang B. ^{[1
]}

Luo Z.-C. ^{[1
]}

Liang Q.-Q. ^{[1
]}

Zhu L.-P. ^{[1
]}

Zhang J.-M. ^{[1
]}

机构：

[1] Electric Power Research Institute, Guangxi Power Grid Corporation, Nanning

来源：

Journal of Chinese Mass Spectrometry Society | 2019年 / 40卷 / 06期

关键词：

Cold trap; Decomposition products of SF[!sub]6[!/sub; Early diagnosis; Internal fault; Photoelectron ionization time-of-flight mass spectrometer (PEI-TOF MS);

D O I：

10.7538/zpxb.2018.0131

中图分类号：

学科分类号：

摘要：

SF6 gas insulated electrical equipment has been widely used in power gird for its fast installation, low space consuming, high reliability and low maintenance work. However, the partial charging inside of the equipment has significant impact on its insulating performance and can even lead to insulation breakdown. The internal fault of SF6 gas insulated equipment can be found effectively through detection for decomposition products of SF6 gas. In the early stage of internal fault, the decomposition products of SF6 gas are usually in very low concentration due to the adsorption process by the adsorbents in the equipment. And these decomposition products with low concentration can be barely detected by the existing in situ detecting technique, which lead to the influence on early diagnosis. In this work, a portable device based on cold trap (CT) combined with photo-electron ionization time-of-flight mass spectrometry (PEI-TOF MS) was designed to provide a promising technique for detection of trace SF6 gas decomposition such as SO2 and SO2F2, which could be applied for early diagnosis of SF6 gas insulated equipment. The workflow of enriching detection for trace SF6 gas decomposition could be generally divided into four steps: preflushing, sampling, injection and aging. The trace amount of SO2 and SO2F2 in SF6 were enriched by adsorption and desorption process. Carbopack B and Carboxen-1000 were employed as adsorbent in this work. The enrichment ratios for typical decomposition products such as SO2 and SO2F2 were 136 and 49 times, respectively. The detection limits for SO2 and SO2F2 were 0.01 and 0.1 μL/L, respectively. The suitcase CT-PEI-TOF MS has wide application prospect on establishing an early-warning for early diagnosis of SF6 gas insulated equipment. © 2019, Editorial Board of Journal of Chinese Mass Spectrometry Society. All right reserved.

引用

页码：510 / 517

页数：7

共 13 条

[1] Tang J., Zeng F.P., Zhang X.X., Pan J.Y., Yao Q., Hou X.Z., Tang Y., Relationship between decomposition gas ratios and partial discharge energy in GIS, and the influence of residual water and oxygen, IEEE Transactions on Dielectrics and Electrical Insulation, 21, 3, pp. 1226-1234, (2014)
[2] Pan Z., Wen D., Peng P., Fan D., Wang J., Application of SF6 gas decomposition products detection technology to switchgear state diagnosis, High Voltage Apparatus, 52, 7, pp. 196-201, (2016)
[3] Han F., Tang B., Luo Z., Zhang L., Zhu L., Zhang J., Pulse sampling portable TOF MS for in situ detection of decomposition products in SF6 gas insulated equipment, Journal of Chinese Mass Spectrometry Society, 39, 4, pp. 416-423, (2018)
[4] Huang Y.G., Li J.X., Tang B., Zhu L.P., Hou K.Y., Li H.Y., Development of a portable single photon ionization-photoelectron ionization time-of-flight mass spectrometer, Int J Anal Chem, (2015)
[5] Tang B., Zhao W., Zhu L., Hou K., Huang Y., Li H., Online monitoring the discharging products of SF6 with photoelectron ionization mass spectrometry, Journal of Chinese Mass Spectrometry Society, 36, 6, pp. 454-459, (2015)
[6] Hou K.Y., Li J.X., Qu T.S., Tang B., Zhu L.P., Huang Y.G., Li H.Y., Development of a suitcase time-of-flight mass spectrometer for in situ fault diagnosis of SF6-insulated switchgear by detection of decomposition products, Rapid Commun Mass Spectrom, 30, pp. 38-43, (2016)
[7] Zhou W., Qiao S., Li L., Wang B., Hu H., Luo Y., Creeping discharge monitoring of epoxy spacers in GIS using a new target gas CS2 , High Voltage Engineering, 41, 3, pp. 848-856, (2015)
[8] Ma J., Zhang J., Xu C., Zhang C., Qiao X., Zhang B., Design of cold trap system on semiconductor, Transducer and Microsystem Technologies, 35, 11, pp. 84-86, (2016)
[9] Han X., Li J., Jiang J., Wu C., Chen P., Zhang Z., Hou K., Li H., Rapid detection of trace volatile organic compounds by electric driven cryo-trap movable mass spectrometer, Chinese Journal of Analytical Chemistry, 46, 5, pp. 642-649, (2018)
[10] Demeestere K., Dewulf J., Witte B.O., Langenhove H.V., Sample preparation for the analysis of volatile organic compounds in air and water matrices, Journal of Chromatography A, 1153, 1, pp. 130-144, (2007)

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