News Center
Highly sensitive SF6 decomposition process

Highly sensitive SF6 decomposition process

A ppb-level CO sensor based on multi-comb optical-feedback cavity enhanced absorption spectroscopy with a 2.3 μm diode laser was developed for SF6 decomposition analysis in electric power system....

[email protected]
News Detail
  • (PDF) Highly Sensitive and Precise Analysis of SF6

    A ppb-level CO sensor based on multi-comb optical-feedback cavity enhanced absorption spectroscopy with a 2.3 μm diode laser was developed for SF6 decomposition analysis in electric power system....

    Get Price
  • Highly sensitive SO 2 photoacoustic sensor for SF 6

    gas is noninflammable and highly reliable due to its chemical inertness. Due to the presence of electric arcs, sparks or coronas in electric power systems, SF. 6. can be decomposed via the electronic, thermal and optical processes into sulphur fluorides (SF. 2, SF. 3. and SF. 4), which in turn react with electrodes and gas impurities (trace

    Get Price
  • The SF6 Decomposition Mechanism: Background and Significance

    Jan 24, 2017 · The decomposition products of SF 6 contain some highly active substances, such as F, HF, and SO 2. They will further corrode solid insulation material and metal fasteners and generate substances such as CF 4 , COF 2 , C 3 F 8 , C 4 F 8 , C 4 F 10 , C 5 F 10 , C 6 F 12 , CF 8 S, CF 6 S 2 , CO, CO 2 , etc., which will form a vicious cycle and cause further solid insulation deterioration and finally induce sudden failures [ 13 – 15 ].

    Get Price
  • 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.

    Get Price
  • OSA | Highly sensitive photoacoustic multicomponent gas

    A ppb-level photoacoustic multicomponent gas sensor system for sulfur hexafluoride (SF 6) 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.

    Get Price
  • A highly sensitive and selective SnS2 monolayer sensor in

    Mar 01, 2021 · However, partial discharge happens in gas-insulated equipment as time goes, resulting in the decomposition of SF 6 (products: SO 2 F 2, H 2 S, SO 2, HF, etc.),. The decomposed gas products accelerate partial discharge and sharply reduce the insulation strength of electrical equipment, leading to insulation fault,.

    Get Price
  • SF6 By-products: Safety, Cleaning, and Disposal Concerns

    6 Decomposition and Contamination • Reactive decomposition byproducts form when SF 6 is exposed to: 1. spark discharges, 2. partial discharges, 3. switching arcs, and 4. failure arcing • Decomposition byproducts can take the form of gas or powders • Other types of contaminants can include moisture and air (from handling or leakage),

    Get Price
  • (PDF) SF6 Decomposition Gas Sensor Based on GeP Monolayer: A

    Therefore, GeP monolayer is a potential candidate for highly sensitive and selective tunable SF6 decomposition gas sensor for on-line diagnostics of power equipment. Discover the worldresearch

    Get Price
  • 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.

    Get Price
  • OSA | Highly sensitive and selective CO sensor using a 2.33

    The online detection for SF 6 decomposition is an effective means for fault early warning of electric power transmission equipment, which is based on the fact that SF 6 can be decomposed in the case of superheating and a partial discharge (PD) caused by latent inner insulation defects.

    Get Price
  • Highly sensitive and selective polyaniline thin-film sensors

    Feb 01, 2015 · The sensitivity of PANI sensors to SOF 2 and SO 2 F 2 are 24.5% and 10%, respectively. The obtained recovery times for SOF 2 and SO 2 F 2 are 220 and 90 s, respectively, which are much faster than those for H 2 S and SO 2. H 2 S is an important and main decomposition component of SF 6 under intense partial discharge.

    Get Price
  • The Decomposition Products of Sulfur Hexafluoride (SF6) with

    The Decomposition Products of Sulfur Hexafluoride (SF6) with Metals Dissolved in Liquid Ammonia Holger Lars Deubner and Florian Kraus * Fachbereich Chemie, Philipps-Universität Marburg, 35043 Marburg, Germany; [email protected] * Correspondence: fl[email protected]; Tel.: +49-6421-28-26668

    Get Price
  • Phosphorene: A Promising Candidate for Highly Sensitive and

    May 05, 2017 · Phosphorene: A Promising Candidate for Highly Sensitive and Selective SF 6 Decomposition Gas Sensors Abstract: Phosphorene is a promising candidate for gas sensing materials. This letter describes our study of the adsorption of SF 6 and SF 6 decomposition gases (SO 2 and H 2 S) on phosphorene.

    Get Price
  • 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.

    Get Price
  • Highly Sensitive and Precise Analysis of SF 6 Decomposition

    Highly Sensitive and Precise Analysis of SF 6 Decomposition Component CO by Multi-comb Optical-feedback Cavity Enhanced Absorption Spectroscopy With a 2.3 μm Diode Laser Sci Rep . 2019 Jul 4;9(1):9690. doi: 10.1038/s41598-019-46190-z.

    Get Price
  • Myth About SF6 Gas In Electrical Equipment

    Where is SF6 used? The following applications are known. For some of these most probably you haven’t heard of. For sound insulation in windows, In vehicle tyres, Is SF6 a health hazard? Pure SF6 is physiologically completely harmless for humans and animals. It’s even used in medical diagnostic. Due to its weight it might displace the oxygen in the air, if large quantities are concentrating in deeper and non ventilated places. Is SF6 harmful for the environment? It has no ecotoxic potential, it does not deplete ozone. Due to its high global warming potential of 22.200 (*) it may contribute to the man made greenhouse-effect, if it is released into the atmosphere. What is the overall contribution of SF6 used in the electrical equipment to the greenhouse effect? Less than 0,1 % ( see CAPIEL) and CIGRE). In an Ecofys study the contribution to the greenhouse effect in Europe is estimated to 0.05 % (*).

  • Optical technology for detecting the decomposition products

    The methods of SF6 SF 6 decomposition products detection can be divided into chemical and optical methods. Chemical detection employs adsorption, separation, and other methods and the various physical and chemical properties of different products to detect decomposition product concentrations.

    Get Price
  • Detection of trace disulfur decafluoride in sulfur

    Highly sensitive SO_2 photoacoustic sensor for SF_6 decomposition detection using a compact mW-level diode-pumped solid-state laser emitting at 303 nm. Optics Express 2017, 25 (26), 32581. doi.org/10.1364/OE.25.032581 Xiaohua Wang, Yuwei Fu, Mingzhe Rong, Xi Li, Qinging Gao, Aijun Yang, Dingxin Liu.

    Get Price
  • 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).

    Get Price
  • Enhanced NO2 Sensitivity in Schottky-Contacted n-Type SnS2

    Layered materials are highly attractive in gas sensor research due to their extraordinary electronic and physicochemical properties. The development of cheaper and faster room-temperature detectors with high sensitivities especially in the parts per billion level is the main challenge in this rapidly developing field. Here, we show that sensitivity to NO2 (S) can be greatly improved by at

    Get Price
  • 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...

    Get Price
  • CA2504092A1 - Method and device for the detection of sf6

    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.

    Get Price
  • Collisional Decomposition of SF6 | NIST

    Sep 01, 2000 · Abstract Insulating gas mixtures containing SF 6 have been promoted to serve as replacements for pure SF 6 in order to reduce SF 6 atmospheric emission. It has been argued that some synergism may be achieved by choosing proper buffer gases in mixtures with SF 6 such that the buffer gases efficiently slow down electrons into an energy range where the electron attachment cross section for SF 6

    Get Price
  • Phosphorene: A Promising Candidate for Highly Sensitive and

    Phosphorene: A Promising Candidate for Highly Sensitive and Selective SF6 Decomposition Gas Sensors

    Get Price
  • Frontiers | Morphological Characteristics of Molybdenum

    Nevertheless, in the process of equipment operation, the SF6 gas will occur inevitably decomposition due to partial discharge, resulting in the deterioration of insulation performance of the equipment. Therefore, detecting SF6 decomposition products is of positive significance for the safe and stable operation of power system.

    Get Price
  • High Sensitivity and Selectivity of AsP Sensor in Detecting

    Aug 13, 2018 · The resistance in AsP monolayer is highly selective and sensitive to SO 2 in SF 6 decomposition gases, which further demonstrates that it can be an excellent sensing material for online GIS diagnosis.

    Get Price
  • Comparative Study of Materials to SF6 Decomposition

    Feb 07, 2017 · In order to judge the inside insulation fault of SF6 insulated equipment, the gas-sensing properties to a series of characteristic SF6 decomposition components, SOF2, SO2F2, SO2, H2S, CF4, HF, and SF6, have been studied. In this study, a comparative study of these gas-sensing materials has been made in theoretical and experimental fields to find the optimal gas-sensing material, and put

    Get Price
  • Sensors | Free Full-Text | Analysis of the Sensitivity of K

    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

    Get Price
  • A Pt-Doped TiO2 Nanotube Arrays Sensor for Detecting SF6

    3.3. Response of the Gas-Sensitive Characteristics of the Pt-Doped TiO 2 NTs Sensor to SF 6 Decomposition Component Gas. The sensor operating temperature was 150 °C. The gas-sensitive response curve of the Pt-doped TiO 2 NTs sensor was tested with SO 2, SOF 2, and SO 2 F 2 gases at 30, 50, 70, and 100 ppm.

    Get Price
edge-iconMaybe You Will Be Interested
toTop
Click avatar to contact us
Chat Online