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Highly sensitive SF6 decomposition detection systems pdf

Highly sensitive SF6 decomposition detection systems pdf

In order to develop high performance chemoresistive gas sensors for Internet of Everything applications, low power consumption should be achieved due to the limited battery capacity of portable devices. One of the most efficient ways to reduce power consumption is to lower the operating temperature to room temperature. Herein, we report superior gas sensing properties of SnS2 nanograins on ...

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  • Highly sensitive photoacoustic multicomponent gas sensor for

    Abstract: A ppb-level photoacoustic multicomponent gas sensor system for sulfur hexafluoride (SF6) decomposition detection was developed by the use of two near-infrared (NIR) diode lasers and an ultraviolet (UV) solid-state laser. A telecommunication fiber amplifier module was used to boost up the excitation optical power from the two NIR lasers.

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  • (PDF) Highly Sensitive and Precise Analysis of SF6

    Highly Sensitive and Precise Analysis of SF6 Decomposition Component CO by Multi-comb Optical-feedback Cavity Enhanced Absorption Spectroscopy with a 2.3 μm Diode Laser The detection system

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  • Highly sensitive SO 2 photoacoustic sensor for SF 6

    photoacoustic sensor for the application of SF. 6. decomposition detection in an electric power system. A smallsized - UV-band diode-pumped solid-state laser (DPSSL) emitting at 303.6 nm with an output power of 5 mW was employed, whose wavelength corresponds to a strong interference-free electronic spectrum of SO. 2.

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  • Byproducts of Sulfur Hexafluoride (SF6) Use in the Electric

    the decomposition products and concentrations formed under actual conditions can vary depending on the equipment used and the type of electrical discharge (CIGRE 1997). 1 CIGRE (the International Council on Large Electric Systems) is a permanent non-governmental and non­ profit-making international association based in France.

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  • A highly sensitive and selective SnS2 monolayer sensor in

    Request PDF | A highly sensitive and selective SnS2 monolayer sensor in detecting SF6 decomposition gas | A novel 2D material SnS2 with an appropriate bandgap and high mobility, has been

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  • OSA | Highly sensitive photoacoustic multicomponent gas

    A ppb-level photoacoustic multicomponent gas sensor system for sulfur hexafluoride (SF6) decomposition detection was developed by the use of two near-infrared (NIR) diode lasers and an ultraviolet (UV) solid-state laser. A telecommunication fiber amplifier module was used to boost up the excitation optical power from the two NIR lasers.

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  • High sensitivity gas sensor to detect SF6 decomposition

    Oct 01, 2020 · Phosphorene: a promising candidate for highly sensitive and selective SF6 decomposition gas sensors IEEE Electron Device Lett. , 38 ( 7 ) ( 2017 ) , pp. 963 - 966 , 10.1109/led.2017.2701642 View Record in Scopus Google Scholar

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  • A highly sensitive and selective SnS2 monolayer sensor in

    Mar 01, 2021 · The sensitivity is higher than that of other reported SF 6 decomposition gas sensing materials, such as PtSe 2 (S = 59%) . To give an intuitive comparison, we also calculate the corresponding sensitivity of different adsorption systems, as shown in Fig. S4. The sensitivity of SF 6 adsorption system is close to 0%.

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  • CA2504092A1 - Method and device for the detection of sf6

    CA2504092A1 - Method and device for the detection of sf6 decomposition products - Google Patents. This invention is in the field of gas detection for sulphur hexafluoride (SF6) gas decomposition products, particularly for the detection of thionyl fluoride (SOF2) and sulphur dioxide (SO2). The invention relates to a novel portable handheld instrument that can readily detect SOF2, SF4 and SO2 in SF6 gas filled electrical equipment and in air.

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  • OSA | Highly sensitive SO2 photoacoustic sensor for SF6

    In this work, we report the development of a highly sensitive SO 2 photoacoustic sensor for the application of SF 6 decomposition detection in an electric power system. A small-sized UV-band diode-pumped solid-state laser (DPSSL) emitting at 303.6 nm with an output power of 5 mW was employed, whose wavelength corresponds to a strong interference-free electronic spectrum of SO 2 .

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  • SF6 Leak Detection Application Note - Advanced Energy

    Our leak detection solution, based on Photoacoustic Spectroscopy (PAS), is field-proven in several applications and was perfected for SF. 6. leak detec-tion. The PAS technique is highly accurate and reliable. Ultra-high Sensitivity: With its very low detection limit (6 ppb SF. 6. in ambient), our 3731 system

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  • Optical technology for detecting the decomposition products

    Ding et al. 43 used FTIR to analyze the adsorption of SF6 SF 6 and its decomposition products by employing carbon nanotube sensors, and they proposed a new method for detecting SF6 SF 6 decomposition products. IEC60480 44 specifies the test standard for the detection of SF6 SF 6 decomposition products using FTIR.

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  • Pd-doped h-BN monolayer: a promising gas scavenger for SF6

    Mar 25, 2020 · The sensitivity is obtained as − 41.04%, − 108.14% and 2.55% for SO2, SOF2 and SO2F2 systems, respectively, which implies the superior sensing behavior upon SOF2 at room temperature. Our work is meaningful to propose a novel sensing nanomaterial for detection of SF6 decomposed species, bridging the distance to evaluate the operation status of SF6 insulation devices.

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  • Enhancement of Gas Sensing Characteristics of Multiwalled

    H<sub2</subS and SO<sub2</sub are important gas components of decomposed SF<sub6</sub of partial discharge generated by insulation defects in gas-insulated switchgear (GIS). Therefore, H<sub2</subS and SO<sub2</sub detection is important in the state evaluation and fault diagnosis of GIS. In this study, dielectric barrier discharge was used to generate CF<sub4</sub plasma and

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  • Highly sensitive gas leak detector based on a quartz-enhanced

    helium as the gas target [5, 6]. These systems have proven to be extremely sensitive, reaching a leak flow detection range of 10−11 mbar·l/s, which is suitable for quality control of critical components such as, for example, vehicle airbags or cardiac pacemaker cases. Hydrogen gas can also be used.

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  • The SF6 Decomposition Mechanism: Background and Significance

    Jan 24, 2017 · Developing composite nanometer sensor technology by various modification methods with a single response for different components of SF 6 decomposition and establishing relationship between a single component of SF 6 decomposition and the intensity of gas-sensitive characteristic signal in order to obtain the sensor array gas-sensitive element are the key technical problems that need to be resolved in order to realize online monitoring of SF 6 decomposition components with the gas sensor method.

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  • Ni-CNT Chemical Sensor for SF6 Decomposition Components

    Oct 16, 2018 · The limit of detection of the Ni-CNT gas sensor reaches 1 ppm. In addition, the excellent recovery property of the Ni-CNT gas sensor makes it easy to be widely used. A DFT theoretical study was applied to analyze the influence mechanism of Ni modification on SF 6 decomposition components detection.

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  • CN102445433A - SF6 decomposition gas infrared spectrum multi

    The SF6 decomposition gas infrared spectrum multi-component detection method and the device are suitable for electrical equipment fault monitoring and diagnosing in an electrical system with SF6 gas being an insulation and arc extinction medium. On-line gas concentration measurement with high speed, high sensitivity and non-interference is realized.

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  • First-principles study of Pd-MoSe2 as sensing material for

    SF 6 decomposition component detection is an effective way to diagnose the severity and type of electric discharge. In this study, MoSe 2 based material has been chosen as the gas sensing material for the detection of SOF 2 and SO 2 F 2, the two characteristic decomposition components of SF 6.

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  • Mechanism and Application of Carbon Nanotube Sensors in SF6

    Zhang et al. studied the gas sensitive response of Pd-SWCNT sensors to five kinds of SF 6 decomposition gases (SO 2 F 2, SOF 2, SO 2, H 2 S, and CF 4) through density functional theory and found that once exposed to adsorbed gases, the conductivity of nanotube would increase in the following order: SO 2 SOF 2 H 2 S, decrease when adsorbed

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  • Comparative Study of Materials to SF6 Decomposition

    Feb 07, 2017 · To detect, evaluate, and diagnose the insulation status of SF 6 gas insulated equipment using the characteristics of SF 6 decomposition, a series of characteristic SF 6 decomposition components, SOF 2, SO 2 F 2, SO 2, H 2 S, CF 4, HF, and SF 6, are detected by gas sensors, including metal functionalized single wall carbon nanotubes (SWCNTs) [1–6], TiO 2 nanotubes [7–9], and graphene gas sensors [10, 11], as shown in Table 1.

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  • SF6 Decomposition in Gas-Insulated Equipment - IEEE Journals

    Abstract: The increasing application of SF6 as an insulating gas has led to many studies on SF6 decomposition in gas-insulated equipment. In the presence-of an electric arc, spark or corona, SF6 decomposes to a wide variety of chemically active products which possess completely different properties from SF6.

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  • Decomposition Characteristics of SF6 and Partial Discharge

    quantitatively detected by the gas chromatography/mass spectrometry (GC/MS) detection method. The decomposition characteristics of SF6 under four types of negative DC partial discharge (DC-PD) are obtained. The relationship between the decomposition characteristics of SF6 and the PD types was further studied.

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  • Sensitivity Characteristic Analysis of Adsorbent-Mixed Carbon

    Sulfur hexafluoride (SF 6) gas decomposition results from the energy produced by partial discharge (PD). The detection of SO 2 and H 2 S content, as important characteristic components of the decomposition products, is significant in the determination of the insulation level of SF 6 gas and the inside insulation faults of gas-insulated equipment. A number of gas sensors use carbon nanotubes (CNTs).

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  • Tellurene Nanoflake-Based Gas Sensors for the Detection of

    Tellurene has a phosphorene-like puckered configuration and exhibits great air stability. This characteristic makes it highly sensitive to some gases, and therefore, it has a huge potential in gas sensing applications. In this paper, the sensing performance of tellurene-based gas sensors toward SF6 decomposition products, including H2S, SO2, SO2F2, and SOF2, was systematically investigated

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  • SF6 properties, and use in MV and HV switchgear

    Cahier Technique Schneider Electric nO. 188 / p.3 SF6 properties, and use in MV and HV switchgear Contents 1 Introduction 1.1 A brief history of use of SF6 p.4 1.2 SF6 manufacture p.5

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  • Analysis of Insulation Gas SF6 by the GC-BID System: SHIMADZU

    On the other hand, SF 6 is known to be a highly significant greenhouse effect gas, and has been targeted for emissions control by the COP3 Kyoto Protocol. Conventional methods specify analyzing SF 6 using an ECD detector, which is capable of the highly sensitive detection of electrophilic compounds. However, this method results in some unresolved issues, such as the accuracy of quantitation in high concentration ranges and the fact that radioisotopes need to be used, which involves tedious

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  • SnS2 Nanograins on Porous SiO2 Nanorods Template for Highly

    In order to develop high performance chemoresistive gas sensors for Internet of Everything applications, low power consumption should be achieved due to the limited battery capacity of portable devices. One of the most efficient ways to reduce power consumption is to lower the operating temperature to room temperature. Herein, we report superior gas sensing properties of SnS2 nanograins on

    Get Price
  • Safety information for products Detector Tube SF6-products of

    Detector Tube SF6-products of decomposition D050017801 Revision no.: 3,00 Revision date: 17.08.2011 Print date: 17.08.2011 Page 1 of 7 0. General notes These products are articles according to article 3.3 of regulation (EC) no. 1907/2006 (REACh). It is not necessary to supply a Safety Data Sheet for these products.

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