Experimental Study on Gas Decomposition Characteristics of SF6/N2 Mixed Gas Under Breaking Current

被引：0

作者：

Yang J. ^{[1
]}

Ma F. ^{[2
]}

Yu K. ^{[1
]}

Su Z. ^{[2
]}

Xiu S. ^{[1
]}

机构：

[1] College of Electrical Engineering, Xi'an Jiaotong University, Xi'an

[2] State Grid Anhui Electric Power Research Institute, Hefei

来源：

Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 05期

关键词：

Arc; Arcing energy; Decomposition characteristics; Gas analysis; SF[!sub]6[!/sub] gas;

D O I：

10.13336/j.1003-6520.hve.20190430035

中图分类号：

学科分类号：

摘要：

Liquefaction of SF6 can lead to insulation or interruption failures in switchgears that are installed in high-latitude low-temperature regions. Consequently, mixtures are widely used in gas circuit breakers in these regions. The status of the switchgear equipment affects the safe operation of power grids directly, the location of faults and diagnosis of defects are mainly detected by gas decomposition products at present. Consequently, we performed a series of mixture gas decomposition tests on a SF6/N2 gas-insulated circuit breaker after breaking current, studied the characteristic components of the decomposition products, and analyzed the effects of different arc energy and N2 content on the decomposition products of the mixed gas. It is found that the decomposition products of SF6/N2 mixture in the presence of electric arc detected by gas chromatograph are mainly CF4, CO2, SO2, and SOF2. The concentration of these decomposed products increases with arc energy and time increases. With the same arc energy, the higher the proportion of SF6 in the mixed gas is, the higher the decomposition products content will be. And the influence of SF6 ratio on (SO2+SOF2)/ (CO2+CF4) is also obtained.The studies can provide a reference for the diagnosis of internal defects of SF6 mixed gas. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：1616 / 1623

页数：7

共 20 条

[1]

Belmadani B., Casanovas J., SF6 decomposition under power arcs physical aspects, IEEE Transactions on Electrical insulation, 26, 6, pp. 1161-1176, (1991)

[2]

Hirooka K., Kuwahara H., Noshiro M., Et al., Decomposition products of SF6 gas by high-current arc and their reaction mechanism, Electrical Engineering in Japan, 95, 6, pp. 14-19, (1975)

[3]

Spiliopoulo I., The effects of moisture and gaseous additives on SF6 recovery characteristics, European Transactions on Electrical Power, 16, 2, pp. 121-136, (2006)

[4]

Heise H.M., Kurte R., Fischer P., Et al., Gas analysis by infrared spectroscopy as a tool for electrical fault diagnostics in SF6 insulated equipment, Fresenius' Journal of Analytical Chemistry, 358, 7-8, pp. 793-799, (1997)

[5]

Ji Y., Yan X., Wang C., Et al., Experimental study on SF6 decomposition products under the stress of electrical Arc, High Voltage Apparatus, 49, 6, pp. 22-25, (2013)

[6]

Zhang B., Liu Y., Guan Y., Et al., The site application of SF6 decomposition products analysis to two GIS insulation fault diagnosis of SF6 electric equipment, Northeast Electric Power, 5, pp. 18-20, (2013)

[7]

Yang Y., Xu H., Wu J., Et al., Research status and development of SF6 decomposition products detection technology, Zhejiang Electric Power, 10, (2016)

[8]

Yan X., Wang C., Yang R., Et al., Fault diagnosis of high voltage switchgears by decomposition products of SF6 , Power System Technology, 35, 12, pp. 118-123, (2011)

[9]

Zhang H., Jiao J., Xiao D., Et al., Review on electrical characteristics of substitute arc extinguishing gases of sulfur hexafluoride, Electrotechnics Electric, 3, pp. 1-5, (2016)

[10]

Niu W., Zhang G., Lin T., Et al., AC breakdown initiated by thermally induced bubble of nonflammable fluorocarbon and its application prospect in GIL, High Voltage Engineering, 43, 3, pp. 743-753, (2017)

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