scholarly journals A DFT study on the adsorption of Ga-BNNT to SF6 decomposition products under partial discharge

2019 ◽  
Vol 14 ◽  
pp. 102419 ◽  
Author(s):  
Hai Qian ◽  
Jun Deng ◽  
Haibin Zhou ◽  
Xu Yang ◽  
Wei Chen
Keyword(s):  
Partial Discharge ◽  
Dft Study ◽  
Decomposition Products ◽  
Sf6 Decomposition

Recognition of Protrusion Defect Fault in Gas Insulated Switchgear Base on SF6 Decomposition Product

2018 ◽  
Vol 8 (1) ◽  
pp. 131
Author(s):  
Visa Musa Ibrahim
Keyword(s):  
Preventive Maintenance ◽  
Decomposition Product ◽  
Partial Discharge ◽  
Sulphur Hexafluoride ◽  
Decomposition Products ◽  
Gas Insulated Switchgear ◽  
Product Method ◽  
Ftir Spectrometer ◽  
Sf6 Decomposition ◽  
The Impact

A solid analytic procedure of Gas insulated switchgear condition checking is utilized in this studies as a part of exploration for the detection of sulphur hexafluoride gas (SF6) decomposition by-product because of its high affectability, reliability and anti-electromagnetic obstruction. This is known as chemical decomposition by-product method. A simulated coaxial deterioration chamber was designed and used on the high voltage electrode to re-enact the decomposition of SF6 under the impact of protrusion defect that generates partial discharge in the coaxial chamber at a pressure of 0.2MPa.The chamber is energised at 50kv for the period of 50 hours and the generated partial discharge simulate the decomposition of SF6 gas. The deterioration decomposition products SO2, SOF2, SO2F2, SO2F10, SiF4, CO, C3F8, C2F6 were detected offline by FTIR spectrometer. These deteriorated items and its concentration can be utilized to recognize and distinguish the type and the magnitude of fault in gas insulated switchgear (protrusion fault) before failure occur for the aim of preventive maintenance.

scholarly journals Platinum modified MoS2 monolayer for adsorption and gas sensing of SF6 decomposition products: a DFT study

High Voltage ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 454-462 ◽  
Author(s):  
Yingang Gui ◽  
Jinzhi Shi ◽  
Pingan Yang ◽  
Tao Li ◽  
Chao Tang ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Dft Study ◽  
Decomposition Products ◽  
Mos2 Monolayer ◽  
Sf6 Decomposition

Influence regularity of trace O6 on SF6 decomposition characteristics and its mathematical amendment under partial discharge

2014 ◽  
Vol 21 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Ju Tang ◽  
Fuping Zeng ◽  
Xiaoxing Zhang ◽  
Jianyu Pan ◽  
Yinjun Qiu ◽  
...  
Keyword(s):  
Partial Discharge ◽  
Sf6 Decomposition

scholarly journals Mono- and Bi-Molecular Adsorption of SF6 Decomposition Products on Pt Doped Graphene: A First-Principles Investigation

2018 ◽  
Vol 8 (10) ◽  
pp. 2010 ◽  
Author(s):  
Yongqian Wu ◽  
Shaojian Song ◽  
Dachang Chen ◽  
Xiaoxing Zhang
Keyword(s):  
Single Molecule ◽  
First Principles ◽  
Density Functional ◽  
Energy Gap ◽  
Adsorption Parameters ◽  
Functional Theory ◽  
Decomposition Products ◽  
Before And After ◽  
Doped Graphene ◽  
Sf6 Decomposition

Based on the first-principles of density functional theory, the SF6 decomposition products including single molecule (SO2F2, SOF2, SO2), double homogenous molecules (2SO2F2, 2SOF2, 2SO2) and double hetero molecules (SO2 and SOF2, SO2 and SO2F2, SOF2 and SO2F2) adsorbed on Pt doped graphene were discussed. The adsorption parameters, electron transfer, electronic properties and energy gap was investigated. The adsorption of SO2, SOF2 and SO2F2 on the surface of Pt-doped graphene was a strong chemisorption process. The intensity of chemical interactions between the molecule and the Pt-graphene for the above three molecules was SO2F2 > SOF2 > SO2. The change of energy gap was also studied and according to the value of energy gap, the conductivity of Pt-graphene before and after adsorbing different gas molecules can be evaluated.

scholarly journals First-Principle Study of Rh-Doped Nitrogen Vacancy Boron Nitride Monolayer for Scavenging and Detecting SF6 Decomposition Products

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3507
Author(s):  
Zhen Shi ◽  
Sheng-Yuan Xia
Keyword(s):  
Boron Nitride ◽  
Sulfur Hexafluoride ◽  
Nitrogen Vacancy ◽  
First Principle ◽  
Density Of State ◽  
Decomposition Products ◽  
Status Assessment ◽  
Sf6 Decomposition ◽  
Computational Processes ◽  
Potential Use

The scavenging and detection of sulfur hexafluoride (SF6) decomposition products (SO2, H2S, SO2F2, SOF2) critically matters to the stable and safe operation of gas-insulated switchgear (GIS) equipment. In this paper, the Rh-doped nitrogen vacancy boron nitride monolayer (Rh-VNBN) is proposed as a gas scavenger and sensor for the above products. The computational processes are applied to investigate the configurations, adsorption and sensing processes, and electronic properties in the gas/Rh-VNBN systems based on the first-principle calculations. The binding energy (Eb) of the Rh-VNBN reaches −8.437 eV, while the adsorption energy (Ead) and band gap (BG) indicate that Rh-VNBN exhibits outstanding adsorption and sensing capabilities. The density of state (DOS) analysis further explains the mechanisms of adsorption and sensing, demonstrating the potential use of Rh-VNBN in sensors and scavengers of SF6 decomposition products. This study is meaningful as it explores new gas scavengers and sensors of SF6 decomposition products to allow the operational status assessment of GIS equipment.

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