Experimental analysis of the feasibility of CF3I/CO2 substituting SF6 as insulation medium using needle-plate electrodes

Zhang, Xiaoxing; Xiao, Song; Jing-en, Zhou; Tang, Ju

doi:10.1109/tdei.2014.004160

Cited by 33 publications

(18 citation statements)

References 17 publications

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“…The spacing distance between needle and plate electrode is set to 10 mm. 28 Air-gap refers to the insulation defects caused by loose-contact of internal components, such as the air-gap induced by different expansion coefficient between metal or epoxy resin, as the simulation model shown in Figure 1(b). 29 The insulation defect model of impurity is presented in Figure 1(c), in which two copper plate electrode is closely bonded to a cylindrical epoxy resin insulator, and there is no bubbles and cracks in the junction.…”

Section: A High Voltage Ac Systemmentioning

confidence: 99%

Study on the characteristic decomposition components of air-insulated switchgear cabinet under partial discharge

Gui

Zhang

et al. 2016

AIP Advances

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Air-insulated switchgear cabinet plays a critical role in entire power transmission and distribution system. Its stability directly affects the operational reliability of the power system. And the on-line gas detection method, which evaluates the insulation status of insulation equipment by detecting the decomposition components of filled air in cabinet, becomes an innovative way to ensure the running stability of air-insulated switchgear cabinet. In order to study the characteristic gas types and production regularity of decomposition components under partial discharge, three insulation defects: needle-plate, air-gap and impurity defect are proposed to simulate the insulation defects under partial discharge in air-insulated switchgear cabinet. Firstly, the generation pathways and mechanism of composition components are discussed. Then CO and NO2 are selected as the characteristic decomposition components to characterize the partial discharge due to their high concentration and chemical stability. Based on the different change regularity of CO and NO2 concentration under different insulation defect, it provides an effective way to evaluate and predict the insulation defect type and severity in the field.

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Section: A High Voltage Ac Systemmentioning

confidence: 99%

Study on the characteristic decomposition components of air-insulated switchgear cabinet under partial discharge

Gui

Zhang

et al. 2016

AIP Advances

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“…However, the "Kyoto Protocol," which was formulated in 1997, emphasized SF 6 as one of the six greenhouse gases with GWP of 23,900 times that of CO 2 ; moreover, the use of SF 6 should be gradually reduced and an environmentally friendly insulation gas to replace the SF 6 should be selected. Therefore, the recent research and exploration of a new type of environmentally friendly gas has been considered [7]. SF 6 is mainly composed of strong negative gases and mixed gases (CF 3 I, c-C 4 F 8 , C 3 F 8 , and C 2 F 6 ) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

et al. 2017

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This paper explores the decomposition characteristics of a new type of environmentally friendly insulating gas C 6 F 12 O and N 2 mixed gas under AC voltage. The breakdown behavior of 3% C 6 F 12 O and N 2 mixed gas in quasi-uniform field was investigated through a breakdown experiment. The self-recovery of the mixed gas was analyzed by 100 breakdown experiments. The decomposition products of C 6 F 12 O and N 2 under breakdown voltage were determined by gas chromatography-mass spectrometer (GC-MS). Finally, the decomposition process of the products was calculated by density functional theory, and the ionization energy, affinity, and molecular orbital gap of the decomposition products were also calculated. The properties of the decomposition products were analyzed from the aspects of insulation and environmental protection. The experimental results show that the 3% C 6 F 12 O and N 2 mixed gas did not show a downward trend over 100 breakdown tests under a 0.10 MPa breakdown voltage. The decomposition products after breakdown were CF

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“…In [8] the production of Iodine (I 2 ) is simulated and theorised from a CF 3 I-CO 2 gas mixture but not experimentally proven by using an SEM/EDX as is shown in this paper. In [8,9] the insulation characteristics of CF 3 I-CO 2 gas mixtures is evaluated using partial discharge inception voltage. This paper examines the deposited surface by-products created during this process and further develops the process of detecting solid by products [10,11].…”

Section: Introductionmentioning

confidence: 99%

Solid by-products of a CF₃I–CO₂insulating gas mixtures on electrodes after lightning impulse breakdown

Widger

Haddad

2017

J. Phys. Commun.

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This paper investigates the solid by-products of CF 3 I-CO 2 gas mixtures and their proposed use as an alternative insulation medium in gas insulated switchgear and lines. The deposited by-products of a 30%-70% CF 3 I-CO 2 gas mixture are experimentally investigated using stainless steel, aluminium and copper contacts whilst a standard 50 kV lightning impulse is used to cause electrical breakdown in the gas mixture. Following breakdown, the accumulated by-products over the electrodes surface were examined using an imaging microscope and scanning electron microscope. This paper discusses the results of microscope analysis on the surface of the electrodes and explores the effects that the detected by-products could have on high voltage CF 3 I-CO 2 gas insulated equipment.

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Experimental analysis of the feasibility of CF₃I/CO₂ substituting SF₆ as insulation medium using needle-plate electrodes

Cited by 33 publications

References 17 publications

Study on the characteristic decomposition components of air-insulated switchgear cabinet under partial discharge

Study on the characteristic decomposition components of air-insulated switchgear cabinet under partial discharge

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

Solid by-products of a CF₃I–CO₂insulating gas mixtures on electrodes after lightning impulse breakdown

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Experimental analysis of the feasibility of CF3I/CO2 substituting SF6 as insulation medium using needle-plate electrodes

Cited by 33 publications

References 17 publications

Study on the characteristic decomposition components of air-insulated switchgear cabinet under partial discharge

Study on the characteristic decomposition components of air-insulated switchgear cabinet under partial discharge

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

Solid by-products of a CF3I–CO2insulating gas mixtures on electrodes after lightning impulse breakdown

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Experimental analysis of the feasibility of CF₃I/CO₂ substituting SF₆ as insulation medium using needle-plate electrodes

Solid by-products of a CF₃I–CO₂insulating gas mixtures on electrodes after lightning impulse breakdown