Principal decomposition by-products generated at various abnormalities in gas-insulated transformers

Mukaiyama, Yoku; Takagi, Isao; Ishihara, Hayato; Kudo, A.; Makino, Yoshihiro; Hosokawa, N.

doi:10.1109/61.85856

Cited by 12 publications

(10 citation statements)

References 9 publications

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“…Thus, the IR absorption spectrum of a gaseous decomposition product features a peak at the gas absorption wavelength called the typical absorption peak for this gas. Through analyzing the typical absorption position, value and shape of the gas sample IR spectrum, the decomposition products of SF 6 , for example, can be qualitatively and quantitatively detected [ 7 ].…”

Section: Detection Principlementioning

confidence: 99%

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Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

Dong

Zhang

Ren

et al. 2017

Sensors

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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.

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Section: Detection Principlementioning

confidence: 99%

“…The variation of these gases reflects the equipment internal PD and insulation status. Through quantitatively detecting and analyzing these gaseous components, potential equipment failure and security problems can be diagnosed to provide an early warning of degraded device status [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

Dong

Zhang

Ren

et al. 2017

Sensors

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“…6,7 The running stability of gas-insulated equipment can be greatly affected by the decomposition products of SF 6 , which may ultimately lead to the breakdown of the power system. 8,9 To ensure the strong insulation of SF 6 -insulated equipment, one of the effective approaches is to maintain the purity of the filled gas, that is, removing the decomposition products of SF 6 online. 10,11 Considering the large concentration and high chemical stability of SO 2 F 2 , it is urgent to find an effective adsorbent for its removal.…”

Section: Introductionmentioning

confidence: 99%

Au Catalyst-Modified MoS₂ Monolayer as a Highly Effective Adsorbent for SO₂F₂ Gas: A DFT Study

Tao

Chen

et al. 2019

ACS Omega

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To ensure the stable operation of gas-insulated equipment, removal of SF 6 decomposition products of sulfur hexafluoride (SF 6 ) is one of the best methods. SO 2 F 2 is one of the typical decomposition products of SF 6 , while the Au-modified MoS 2 (Au–MoS 2 ) monolayer is a novel gas adsorbent. Therefore, based on the first-principles calculation, the adsorption properties of the SO 2 F 2 molecule on the Au–MoS 2 monolayer are calculated. Furthermore, the adsorption energy, charge transfer, and structure parameters were analyzed to obtain the most stable adsorption structure. These results indicate that all of the adsorption processes are exothermic. To better study the adsorption mechanism between the SO 2 F 2 molecule and the Au–MoS 2 monolayer, the density of states, the highest occupied molecular orbital, the lowest unoccupied molecular orbital, and electron density difference were obtained. At last, we conclude that the interaction between the SO 2 F 2 molecule and the Au–MoS 2 monolayer was chemisorption. This study provides a theoretical basis to prepare the Au–MoS 2 monolayer for the removal of SF 6 decomposition products.

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“…The thermal decomposition components of SF 6 present obvious differences in formation regularity. Their chemical and physical significance also varies [11][12][13]. If only the absolute formation concentration of components is used to identify the fault information of the equipment, the accumulation time and the gas chamber volume [10] will considerably affect the diagnosis results.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, only a few studies have examined the thermal decomposition of SF 6 [1]. The existing results indicate that [6,9,13,14] SF 6 can react with several metal materials when the temperature is higher than 200°C. Various gaseous by-products, metal fluorides and metal sulphides can be produced.…”

Section: Introductionmentioning

confidence: 99%

Feature extraction of SF ₆ thermal decomposition characteristics to diagnose overheating fault

Tang

Pan

Yao³

et al. 2015

IET Science, Measurement & Technology

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Principal decomposition by-products generated at various abnormalities in gas-insulated transformers

Cited by 12 publications

References 9 publications

Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

Au Catalyst-Modified MoS₂ Monolayer as a Highly Effective Adsorbent for SO₂F₂ Gas: A DFT Study

Feature extraction of SF ₆ thermal decomposition characteristics to diagnose overheating fault

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Principal decomposition by-products generated at various abnormalities in gas-insulated transformers

Cited by 12 publications

References 9 publications

Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

Electrochemical and Infrared Absorption Spectroscopy Detection of SF6 Decomposition Products

Au Catalyst-Modified MoS2 Monolayer as a Highly Effective Adsorbent for SO2F2 Gas: A DFT Study

Feature extraction of SF 6 thermal decomposition characteristics to diagnose overheating fault

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Product

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Au Catalyst-Modified MoS₂ Monolayer as a Highly Effective Adsorbent for SO₂F₂ Gas: A DFT Study

Feature extraction of SF ₆ thermal decomposition characteristics to diagnose overheating fault