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Sensors 2017, 17(11), 2627; https://doi.org/10.3390/s17112627

Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

1
State Key Laboratory of Electrical Insulation for Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
2
Departamento de Ingeniería Eléctrica, Electrónica, Automática y Física Aplicada, Escuela Técnica Superior de Ingeniería y Diseño Industrial (ETSIDI), Universidad Politécnica de Madrid (UPM), Ronda de Valencia 3, Madrid 28012, Spain
3
Maintenance Company of State Grid Shaanxi Electric Power Company, Xi’an 710065, China
*
Author to whom correspondence should be addressed.
Received: 15 October 2017 / Revised: 3 November 2017 / Accepted: 8 November 2017 / Published: 15 November 2017
(This article belongs to the Special Issue Spectroscopy Based Sensors)
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Abstract

Sulfur hexafluoride (SF6) gas-insulated electrical equipment is widely used in high-voltage (HV) and extra-high-voltage (EHV) power systems. Partial discharge (PD) and local heating can occur in the electrical equipment because of insulation faults, which results in SF6 decomposition and ultimately generates several types of decomposition products. These SF6 decomposition products can be qualitatively and quantitatively detected with relevant detection methods, and such detection contributes to diagnosing the internal faults and evaluating the security risks of the equipment. At present, multiple detection methods exist for analyzing the SF6 decomposition products, and electrochemical sensing (ES) and infrared (IR) spectroscopy are well suited for application in online detection. In this study, the combination of ES with IR spectroscopy is used to detect SF6 gas decomposition. First, the characteristics of these two detection methods are studied, and the data analysis matrix is established. Then, a qualitative and quantitative analysis ES-IR model is established by adopting a two-step approach. A SF6 decomposition detector is designed and manufactured by combining an electrochemical sensor and IR spectroscopy technology. The detector is used to detect SF6 gas decomposition and is verified to reliably and accurately detect the gas components and concentrations. View Full-Text
Keywords: SF6 gas decomposition products; electrochemical sensing (ES); infrared (IR) spectroscopy; detection characteristic; detector SF6 gas decomposition products; electrochemical sensing (ES); infrared (IR) spectroscopy; detection characteristic; detector
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Dong, M.; Zhang, C.; Ren, M.; Albarracín, R.; Ye, R. Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products. Sensors 2017, 17, 2627.

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