Partial discharge recognition through an analysis of SF<sub>6</sub> decomposition products part 1: decomposition characteristics of SF<sub>6</sub> under four different partial discharges

Tang, Ju; Liu, Fan; Zhang, Xiaoxing; Meng, Qing-Hao; Zhou, Jiabin

doi:10.1109/tdei.2012.6148499

Cited by 235 publications

(148 citation statements)

References 14 publications

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“…Van Brunt [16] and other related investigations [10][11][12], the main gas components of SF 6 decomposition under PD include HF, CF 4 , CO 2 , SO 2 F 2 , SOF 4 and SOF 2 , where HF is a strong acidic substance which can easily react with metals and insulation materials, thereby decreasing the amount of HF as the discharge time increases. SOF 4 can easily hydrolyse and is unstable; CF 4 and CO 2 are mainly used to reflect the degradation status of solid organic insulation materials, which are not discussed in the present study.…”

Section: Influence Regularity Of Metal Electrodementioning

confidence: 91%

“…However, the SF 6 decomposition characteristics under PD are not only related to the insulation fault pattern and PD energy but are also closely associated with the type of metal electrode material in the PD location [9,10]. The metal material in the discharge area can react with primary decomposed products (low fluoride SF x ) and react into metal fluorides [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

Zeng¹,

Luo²,

Tang³

et al. 2017

Journal of Electrical Engineering and Technology

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-SF 6 decomposition products can be used to detect partial discharge (PD), but the metal materials in a PD area can significantly affect SF 6 decomposition characteristics. Disregarding the effect of metal materials on such characteristics inevitably result in certain errors when using them to diagnose the internal insulation faults of gas-insulated switchgears. This paper investigates the influence regularity on the main stable decomposition components of SF 6 (namely SO 2 F 2 and SOF 2 ) of the commonly metal materials uesd in GIS, such as aluminum (Al), copper (Cu) and stainless steel (SS). Firstly, an experimental platform is constructed to simulate SF 6 decomposition under a PD area, and the influence regularities of Al, Cu and SS on the concentration, formation rate and saturation time of SO 2 F 2 and SOF 2 are obtained. Secondly, the influence mechanism of Al, Cu and SS are preliminary explored combined with the chemical activity of the metal materials.

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Section: Influence Regularity Of Metal Electrodementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

Zeng¹,

Luo²,

Tang³

et al. 2017

Journal of Electrical Engineering and Technology

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“…Many kinds of chemical products are generated, such as SOF 4 , SOF 2 , SO 2 F 2 , SF 4 , SO 2 , CF 4 , CO 2 , HF [9], and so forth. These decomposition products can indicate PD in GIS, allowing for the PD recognition by analyzing SF 6 decomposition products.…”

Section: Chemical Methods Offlinementioning

confidence: 99%

“…There are a variety of diagnostic approaches based on pulse current, acoustic, chemical, and ultra-high frequency (UHF) detection techniques [2][3][4][5][6][7][8][9][10]. However, each of these approaches can be performed effectively to some extent with its own limitations.…”

Section: Introductionmentioning

confidence: 99%

Application of Joint Electro-Chemical Detection for Gas Insulated Switchgear Fault Diagnosis

Li¹,

Tang²,

Li³

2015

Journal of Electrical Engineering and Technology

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-The integrity of the gas insulated switchgear (GIS) is vital to the safety of an entire power grid. However, there are some limitations on the techniques of detecting and diagnosing partial discharge (PD) induced by insulation defects in GIS. This paper proposes a joint electro-chemical detection method to resolve the problems of incomplete PD data source and also investigates a new unique fault diagnosis method to enhance the reliability of data processing. By employing ultra-high frequency method for online monitoring and the chemical method for detecting SF6 decomposition offline, the acquired data can form a more complete interpretation of PD signals. By utilizing DS evidence theory, the diagnostic results with tests on the four typical defects show the validity of the new fault diagnosis system. With higher accuracy and lower computation cost, the present research provides a promising way to make a more accurate decision in practical application.

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“…If PD appears in pure SF 6 , these low luorine sulfur products will recombine into SF 6 after they difuse out of the local high voltage area. The transient decomposition process of SF 6 has litle inluence on the insulation performances of SF 6 -insulated equipment [18,19,20]. However, various impurities, such as trace amounts of air and water, exist in SF 6 gas-insulated equipment inevitably (at present, the content of impurity of SF 6 produced in our country can meet the requirement of International Electrotechnical Commission (IEC) standards and technical conditions in our country).…”

Section: The Current Developments Of the Sf 6 Decomposition Mechanismmentioning

confidence: 99%

The SF6 Decomposition Mechanism: Background and Significance

Zhang¹,

Tang²,

Xiao³

et al. 2017

Nanomaterials Based Gas Sensors for SF6 Decomposition Components Detection

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Gas Insulated Switchgear (GIS) has been widely used in substations. The insulating medium used in GIS is sulfur hexaluoride (SF 6 ) gas. However, the internal insulation defect existed in GIS would inevitably lead to partial discharge (PD), and cause the composition of SF 6 to SOF 2 , SO2F 2 and SO 2 and other characteristic component gases. The decomposition phenomenon would greatly reduce the insulation performance of SF 6 insulated equipment, and even paralyze the whole power supply system. In this chapter, we irst discuss the objective existence, decomposition mechanism and harmness of insulation defects. Then the methods for insulation defects detection used to avoid the insulation accidents are introduced. Comparing all of the detection methods, diagnosing the insulation defect through analyzing the decomposed gases of SF 6 by chemical gas sensors is the optimal method due to its advantages, such as high detection accuracy and stability, signifying the importance of developing chemical gas sensor used in SF6 insulated equipment. In conclusion, there kinds of gas sensor material, carbon nanotubes, graphene, are chosen as the gas sensing materials to build speciic gas sensors for detecting each kind of SF 6 decomposed gases, and then enhance the gas sensitivity and selectivity by material modiication.

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Partial discharge recognition through an analysis of SF₆ decomposition products part 1: decomposition characteristics of SF₆ under four different partial discharges

Cited by 235 publications

References 14 publications

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

Application of Joint Electro-Chemical Detection for Gas Insulated Switchgear Fault Diagnosis

The SF6 Decomposition Mechanism: Background and Significance

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Partial discharge recognition through an analysis of SF6 decomposition products part 1: decomposition characteristics of SF6 under four different partial discharges

Cited by 235 publications

References 14 publications

Influence Regularity of Aluminum, Copper and Stainless-steel on SF6 PD Decomposition Characteristics Components

Influence Regularity of Aluminum, Copper and Stainless-steel on SF6 PD Decomposition Characteristics Components

Application of Joint Electro-Chemical Detection for Gas Insulated Switchgear Fault Diagnosis

The SF6 Decomposition Mechanism: Background and Significance

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Product

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Partial discharge recognition through an analysis of SF₆ decomposition products part 1: decomposition characteristics of SF₆ under four different partial discharges

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components