Analysis of dissolved C_2H_2 in transformer oils using laser Raman spectroscopy

Somekawa, Toshihiro; Kasaoka, Makoto; Kawachi, Fumio; Nagano, Yoshitomo; Fujita, Masayuki; Izawa, Yasukazu

doi:10.1364/ol.38.001086

Cited by 32 publications

(13 citation statements)

References 14 publications

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“…So, the detection limit of oil-dissolved acetic acid can be estimated to be 3σ~0.68 mg/mL [25,26], where σ is the ratio between standard deviation of the Raman spectrum from acetic acid free oil sample (between 858 and 878 cm −1 range) and internal standard Raman intensity at~932 cm −1 . If higher detection limit or sensitivity is required, it may be achieved by selective surface enhanced Raman scattering (SERS) [35].…”

Section: Detection Limitmentioning

confidence: 99%

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

Wan

Chen

et al. 2017

Energies

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Analyzing the concentration of low molecular acids dissolved in oil is vital in the oil-paper insulation aging diagnostic procedure of power transformers. The existing methods cannot distinguish between different acid types and their strengths. In this study, an improved solution Raman detection platform is fabricated. The direct measurement of dissolved acetic acid, a kind of low molecular acids, is observed in transformer oil without extraction. The Raman shift line of oil-dissolved acetic acid at 891 cm −1 corresponding to H-C-H symmetrical swing and O-H swing modes is taken as its characteristic value. Taking Raman shift line of pure oil at 932 cm −1 as an internal standard, a linear regression curve for quantitative analysis is obtained with a slope of 0.19. The best platform parameter of accumulation number is 300, which is determined by Allan deviation analysis. The current concentration detection limit and accuracy for oil-dissolved acetic acid are obtained at about 0.68 mg/mL and 91.66%, separately. The results show that Raman spectroscopy could be a useful alternative method for evaluation insulation aging state of an operating power transformer in the future.

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Section: Detection Limitmentioning

confidence: 99%

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

Wan

Chen

et al. 2017

Energies

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“…The analysis of dissolved C 2 H 2 output is much helpful for diagnosing the potential fault defects and types timely and effectively. [1][2][3][4][5][6][7] Therefore, great attention has been drawn to this area over the past few years. Various types of technologies including metal oxide semiconductors, 8,9 carbon nanotubes 10 and photoacoustic spectroscopy 11,12 have been adopted for C 2 H 2 detection.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterisation and sensing properties of Sm₂O₃doped SnO₂nanorods to C₂H₂gas extracted from power transformer oil

Zhou¹,

Tang²,

Zhu³

et al. 2016

Materials Technology

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In this paper, pure and 1.5, 2.5 and 3.5 at.-% samarium oxide (Sm 2 O 3 ) doped tin oxide (SnO 2 ) nanorods were successfully synthesised with a facile and environment friendly hydrothermal process. All the as prepared nanostructures were carefully characterised by X-ray diffraction, field emission SEM, TEM, high resolution TEM and X-ray photoelectron spectroscopy respectively. Planar sensors were further fabricated with the as synthesised samples, and their sensing properties towards acetylene gas (C 2 H 2 ), an extremely significant fault characteristic gas dissolved in oil immersed power transformers, were systematically measured. Interestingly, the sensing properties of the fabricated SnO 2 nanorod based sensor to C 2 H 2 gas can be obviously enhanced by adding Sm 2 O 3 , and the sensor doped with 3.5 at.-%Sm 2 O 3 displays the most superior sensing characteristics, including operating temperature, sensitivity, response and recovery time, etc., as compared to other three cases. All results indicate that the synthesised Sm 2 O 3 doped SnO 2 sensing material might be a promising candidate for C 2 H 2 sensing and lay a solid foundation for exploring high performance chemical gas sensor to detect C 2 H 2 gas extracted from power transformer oil.

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“…Large-scale power transformers are expensive and significant electric apparatus in electric grid system [1,2]. At present, a large number of power transformers are still in oil-paper insulation structure, and some insulating defects unavoidably exist during transformer design, manufacturer, installation and operation [3].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, acetylene gas C 2 H 2 is the most effective one to identify thermal and electrical faults. Thus, how to rapidly and accurately detect C 2 H 2 gas is currently the subject of intensive research and great attention has been focused on this issue for the past few years [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research on Acetylene Sensing Properties and Mechanism of SnO₂Based Chemical Gas Sensor Decorated with Sm₂O₃

Zhou

Cao

et al. 2015

Journal of Nanotechnology

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Acetylene C 2 H 2 gas is one of the most important fault characteristic hydrocarbon gases dissolved in oil immersed power transformer oil. This paper reports the successful preparation and characterization of samarium oxide Sm 2 O 3 decorated tin oxide SnO 2 based sensors with hierarchical rod structure for C 2 H 2 gas detection. Pure and Sm 2 O 3 decorated SnO 2 sensing structures were synthesized by a facile hydrothermal method and characterized by XRD, FESEM, TEM, EDS, and XPS measurements, respectively. Planar chemical gas sensors with the synthesis samples were fabricated, and their sensing performances to C 2 H 2 gas were systematically performed and automatically recorded by a CGS-1 TP intelligent gas sensing analysis system. The optimum operating temperature of the Sm 2 O 3 decorated SnO 2 based sensor towards 50 L/L of C 2 H 2 is 260 ∘ C, and its corresponding response value is 38.12, which is 6 times larger than the pure one. Its response time is about 8-10 s and 10-13 s for recovery time. Meanwhile good stability and reproducibility of the decorated sensor to C 2 H 2 gas are also obtained. Furthermore, the proposed sensor exhibits excellent C 2 H 2 selectivity among some potential interface gases, like H 2 and CO gas. All sensing results indicate the sensor fabricated with oxide Sm 2 O 3 decorated SnO 2 nanorods might be a promising candidate for C 2 H 2 detection in practice.

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Analysis of dissolved C_2H_2 in transformer oils using laser Raman spectroscopy

Cited by 32 publications

References 14 publications

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

Synthesis, characterisation and sensing properties of Sm₂O₃doped SnO₂nanorods to C₂H₂gas extracted from power transformer oil

Research on Acetylene Sensing Properties and Mechanism of SnO₂Based Chemical Gas Sensor Decorated with Sm₂O₃

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Analysis of dissolved C_2H_2 in transformer oils using laser Raman spectroscopy

Cited by 32 publications

References 14 publications

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

Synthesis, characterisation and sensing properties of Sm2O3doped SnO2nanorods to C2H2gas extracted from power transformer oil

Research on Acetylene Sensing Properties and Mechanism of SnO2Based Chemical Gas Sensor Decorated with Sm2O3

Contact Info

Product

Resources

About

Synthesis, characterisation and sensing properties of Sm₂O₃doped SnO₂nanorods to C₂H₂gas extracted from power transformer oil

Research on Acetylene Sensing Properties and Mechanism of SnO₂Based Chemical Gas Sensor Decorated with Sm₂O₃