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Sensors 2015, 15(11), 28367-28384; doi:10.3390/s151128367

Analysis of the Sensitivity of K-Type Molecular Sieve-Deposited MWNTs for the Detection of SF6 Decomposition Gases under Partial Discharge

1
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
2
School of Electrical Engineering, Wuhan University, Wuhan 430072, China
3
Maintenance Company, State Grid Zhejiang Electric Power Company, Hangzhou 311232, China
*
Author to whom correspondence should be addressed.
Academic Editor: Michael Tiemann
Received: 4 August 2015 / Revised: 4 November 2015 / Accepted: 5 November 2015 / Published: 11 November 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1368 KB, uploaded 11 November 2015]   |  

Abstract

Sulfur hexafluoride (SF6) is widely utilized in gas-insulated switchgear (GIS). However, part of SF6 decomposes into different components under partial discharge (PD) conditions. Previous research has shown that the gas responses of intrinsic and 4 Å-type molecular sieve-deposited multi-wall carbon nanotubes (MWNTs) to SOF2 and SO2F2, two important decomposition components of SF6, are not obvious. In this study, a K-type molecular sieve-deposited MWNTs sensor was developed. Its gas response characteristics and the influence of the mixture ratios of gases on the gas-sensing properties were studied. The results showed that, for sensors with gas mixture ratios of 5:1, 10:1, and 20:1, the resistance change rate increased by nearly 13.0% after SOF2 adsorption, almost 10 times that of MWNTs sensors, while the sensors’ resistance change rate with a mixture ratio of 10:1 reached 17.3% after SO2F2 adsorption, nearly nine times that of intrinsic MWNT sensors. Besides, a good linear relationship was observed between concentration of decomposition components and the resistance change rate of sensors. View Full-Text
Keywords: partial discharge; SF6 decomposition component; multi-walled carbon nanotube; K molecular sieve; gas sensitivity partial discharge; SF6 decomposition component; multi-walled carbon nanotube; K molecular sieve; gas sensitivity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, X.; Li, X.; Luo, C.; Dong, X.; Zhou, L. Analysis of the Sensitivity of K-Type Molecular Sieve-Deposited MWNTs for the Detection of SF6 Decomposition Gases under Partial Discharge. Sensors 2015, 15, 28367-28384.

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