SF<sub>6</sub> fault decomposition feature component extraction and triangle fault diagnosis method

Zeng, Fuping; Wu, Siying; Lei, Zhicheng; Li, Chen; Tang, Ju; Yao, Qiang; Miao, Yanwei

doi:10.1109/tdei.2019.008370

Cited by 55 publications

(21 citation statements)

References 19 publications

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“…In cases where the high-voltage insulation equipment has been working for a long time, partial overheating and discharge is very likely to occur, leading to the decomposition of SF 6 . After the decomposition of SF 6 , gases such as HF, SO 2 , SOF 2 and SO 2 F 2 will be generated [ 5 , 6 , 7 ], which will cause aging and even damage to high-voltage insulation equipment [ 8 , 9 , 10 ]. Previous reports have shown that it is possible to judge whether electrical equipment is malfunctioning through detecting the type and content of the SF 6 decomposed products in GIS.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

2021

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As an insulating medium, sulfur hexafluoride (SF6) is extensively applied to electrical insulation equipment to ensure its normal operation. However, both partial discharge and overheating may cause SF6 to decompose, and then the insulation strength of electrical equipment will be reduced. The adsorption properties and sensing mechanisms of four SF6 decomposed components (HF, SO2, SOF2 and SO2F2) upon an Au-modified InN (Au-InN) monolayer were studied in this work based on first-principles theory. Meanwhile, the adsorption energy (Ead), charge transfer (QT), deformation charge density (DCD), density of states (DOS), frontier molecular orbital and recovery property were calculated. It can be observed that the structures of the SO2, SOF2 and SO2F2 molecules changed significantly after being adsorbed. Meanwhile, the Ead and QT of these three adsorption systems are relatively large, while that of the HF adsorption system is the opposite. These phenomena indicate that Au-InN monolayer has strong adsorption capacity for SO2, SOF2 and SO2F2, and the adsorption can be identified as chemisorption. In addition, through the analysis of frontier molecular orbital, it is found that the conductivity of Au-InN changed significantly after adsorbing SO2, SOF2 and SO2F2. Combined with the analysis of the recovery properties, since the recovery time of SO2 and SO2F2 removal from Au-InN monolayer is still very long at 418 K, Au-InN is more suitable as a scavenger for these two gases rather than as a gas sensor. Since the recovery time of the SOF2 adsorption system is short at 418 K, and the conductivity of the system before and after adsorption changes significantly, Au-InN is an ideal SOF2 gas-sensing material. These results show that Au-InN has broad application prospects as an SO2, SOF2 and SO2F2 scavenger and as a resistive SOF2 sensor, which is of extraordinary meaning to ensure the safe operation of power systems. Our calculations can offer a theoretical basis for further exploration of gas adsorbent and resistive sensors prepared by Au-InN.

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Section: Introductionmentioning

confidence: 99%

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

2021

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“…Decomposed component analysis has received attention as a promising diagnostic tool for GIE internal conditions. By qualitative and quantitative surveillance of the decomposition products, faults monitoring and the internal insulation condition can be realized, due to the close relation between generated products and their concentration with the type of insulation degradation [6]. Detecting the SF6 decomposition products in the gas chamber refers to the presence of a PD source in the equipment [9].…”

Section: ) Pd Analysis Based On Decomposed Component Analysis (Dca)mentioning

confidence: 99%

“…When subjected to electrical discharges, such as due to an electrical fault, portions of SF6 gas dissociate or decompose into by-products, which in turn affect its overall insulation properties. Apart from electrical discharges, SF6 decomposition may also be caused by thermal stress [6] [7]. Many researchers have studied the high current discharges, such as the arc and spark discharges, as well as the small current discharge or the partial discharge (PD), and the impact of the discharges on the insulation strength of the gas-insulated equipment (GIE) [8] [9][10] [11].…”

Section: Introductionmentioning

confidence: 99%

SF₆Decomposed Component Analysis for Partial Discharge Diagnosis in GIS: A Review

2022

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This paper compiles, summarizes, and deliberates over one hundred important works on the different approaches and advances in the surveillance and diagnosis of the internal status of SF6 gas-insulated equipment (GIE), particularly partial discharge (PD) diagnosis in gas-insulated switchgear (GIS), and the proposed diagnosis techniques used. This review focused on four research aspects on PD diagnosis related to the developments in PD detection techniques, PD sources identification, and PD severity evaluation. Besides, the effect of various factors such as gas pressure, applied voltage, and impurities on the deterioration of insulation gas and its influence on the diagnosis process has been reviewed. Currently, some reviews on PD diagnosis in SF6-insulated switchgear have been presented and analysed; however, to date, most of them tend to focus on various PD detection techniques in GIS, while others are not extensive and comprehensive reviews. Unlike the available review publications, this paper highlighted various aspects of PD diagnosis in GIS and created a base for further development. The research trend in this field is expected to be directed toward a comprehensive assessment. This review provided a position of the current PD diagnosis in GIS studies and developments that can be a guideline for researchers for further research on the topic's actual impact in the field.

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“…Sulfur hexafluoride (SF6) has been widely applied in the power industry considering its excellent arc extinguishing and insulation properties, such as gas-insulated switchgear (GIS) and gas-insulated line (GIL) [1]. However, SF6 is an extremely strong greenhouse gas with high global warming potential (GWP, 23500) and long atmospheric lifetime (3200 years), this will influence global warming seriously at a long time [2][3].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, when GIE possesses defects such as poor contact, magnetic saturation effect or overloading, the thermal stability of the defective part will be destroyed, which will cause partial overheating fault (POF) [1]. On one hand, the degradation can be accelerated at the presence of POF, even damaging the insulating material and causing partial discharge (PD) or insulation breakdown.…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxygen and Temperature on Thermal Decomposition Characteristics of C₄F₇N/CO₂/O₂ Gas Mixture for MV Equipment

Zhang

Xie³

et al. 2020

IEEE Access

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SF₆ fault decomposition feature component extraction and triangle fault diagnosis method

Cited by 55 publications

References 19 publications

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

SF₆Decomposed Component Analysis for Partial Discharge Diagnosis in GIS: A Review

Effect of Oxygen and Temperature on Thermal Decomposition Characteristics of C₄F₇N/CO₂/O₂ Gas Mixture for MV Equipment

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SF6 fault decomposition feature component extraction and triangle fault diagnosis method

Cited by 55 publications

References 19 publications

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

SF6Decomposed Component Analysis for Partial Discharge Diagnosis in GIS: A Review

Effect of Oxygen and Temperature on Thermal Decomposition Characteristics of C4F7N/CO2/O2 Gas Mixture for MV Equipment

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About

SF₆ fault decomposition feature component extraction and triangle fault diagnosis method

SF₆Decomposed Component Analysis for Partial Discharge Diagnosis in GIS: A Review

Effect of Oxygen and Temperature on Thermal Decomposition Characteristics of C₄F₇N/CO₂/O₂ Gas Mixture for MV Equipment