N2 and N2/CO2 Mixture in Gas Insulated Compartments under High Pressure

Kynast, E; Juhre, Karsten

doi:10.1007/978-1-4419-8979-6_29

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…This unpredictable behavior is of course unwanted in practical applications of such a gas. Similar results have been observed [2]. In designing components with gaseous insulation, a stable and predictable performance is required.…”

Section: Introductionsupporting

confidence: 80%

Comparison of the Breakdown Strength of N2, CO2 and SF6 using the Extended Up-and-Down Method

Meijer

Smit

Girodet

2006

2006 IEEE 8th International Conference on Properties and Applications of Dielectric Materials

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Nowadays in Gas Insulated Systems (GIS), SF6 is often used as insulating medium. Due to the fact that SF6 is a greenhouse gas with a very high global warming potential (GWP), alternatives have been searched for over the last years. In particular, SF6/N2 gas mixtures have been extensively investigated for the use in Gas Insulated Lines (GIL) and is being used in several applications. However, in these cases SF6 is still part of the insulating gas and the search for alternatives continues.In this respect, nitrogen (N2) and carbon dioxide (CO2) are interesting alternatives. In this paper, investigations into the breakdown strength of these gases will be described. Both gases were investigated in a plane-plane configuration, with a distance of 10 mm between the planes. The gas pressure was varied in steps of 2 bar, from 7 to 11 bar.To get to the 5%0 breakdown value under positive and negative lightning as well as switching impulses, the extended up-and-down method was applied and will be discussed in the paper. The results are compared to 3 and 4 bar SF6 to get the required data that can be used for design purposes.

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Section: Introductionsupporting

confidence: 80%

Comparison of the Breakdown Strength of N2, CO2 and SF6 using the Extended Up-and-Down Method

Meijer

Smit

Girodet

2006

2006 IEEE 8th International Conference on Properties and Applications of Dielectric Materials

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“…Traditionally, SF6 was used in the gas switching systems as this gas provides high breakdown strength, and high recovery capabilities. However, due to environmental concerns there is a significant interest in finding a gas/gas mixture that can be used in PCS's instead of SF6, [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Breakdown Characteristics of Plasma Closing Switch Filled With Air, N₂, CO₂, and Ar/O₂

Yao

Timoshkin

MacGregor

et al. 2018

IEEE Trans. Plasma Sci.

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One of the critical components of high energy density pulsed power systems used to generate short high-voltage and high-power impulses is gas-filled plasma closing switch. In recent years significant research efforts have been aimed at finding environmentally friendly gases which can be used in the plasma closing switches, and several gases including dry air, nitrogen, carbon dioxide, argon and their mixtures have been considered as potentially suitable working fluids in such switches. However, the lack of knowledge of the breakdown characteristics of complex switching topologies filled with these gases limits their practical applications. Therefore, further investigation of the breakdown performance of plasma closing switches is required, in order to establish their applicability for practical use in high voltage pulsed power systems. The present paper reports on the investigation of the breakdown characteristics of a triggered plasma closing switch topology with corona discharge electrodes. The self-breakdown voltage of the switch, variation in the self-breakdown voltage, time to breakdown, and jitter have been obtained for the switch filled with "Zero Grade" air, N2, CO2 and an Ar/O2 mixture up to a pressure of 10 bar (abs). It was shown that the switch can provide a stable breakdown performance with jitter as low as 1 ns.

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“…The above reaction is fulfilled by oxygen, sulfur hexafluoride, freon, carbon dioxide and fluorocarbons among others. In these gases, "A − " is a sulfur or carbon atom, while "B" is an oxygen atom or one of the halogen atoms or molecules [19,20]. The quantity called capture frequency R for two-body processes has also been described in a mathematical way:…”

Section: Electronegative Gases As An Insulating Mediummentioning

confidence: 99%

Study on the Effect of Helium on the Dielectric Strength of Medium-Voltage Vacuum Interrupters

et al. 2021

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This paper presents the results of a comparative analysis of the dielectric strength of disconnecting vacuum interrupters operating on air and helium. The breakdown voltage Ud was measured in the pressure range from 8.0 × 10−4 Pa to 3.0 × 101 Pa for air and from 8.0 × 10−4 Pa to 7.0 × 102 Pa for helium, while varying the interelectrode distance from 1.0 to 5.0 mm. Dedicated laboratory workstations were used to determine the actual pressure values in the vacuum interrupters tested and to precisely measure and record the dielectric strength results of the test object. It was found that the helium-filled vacuum interrupter maintains its full dielectric strength in significantly larger pressure ranges, while the air-filled vacuum interrupter loses its insulating properties. Thus, it is possible to make vacuum interrupters based on the working medium associated with pure helium, with larger working pressure ratings. Under such conditions, it is easier to maintain the tightness of the device and to limit cut-off currents and overvoltages associated with vacuum switchgear.

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N2 and N2/CO2 Mixture in Gas Insulated Compartments under High Pressure

Cited by 7 publications

References 2 publications

Comparison of the Breakdown Strength of N2, CO2 and SF6 using the Extended Up-and-Down Method

Comparison of the Breakdown Strength of N2, CO2 and SF6 using the Extended Up-and-Down Method

Breakdown Characteristics of Plasma Closing Switch Filled With Air, N₂, CO₂, and Ar/O₂

Study on the Effect of Helium on the Dielectric Strength of Medium-Voltage Vacuum Interrupters

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N2 and N2/CO2 Mixture in Gas Insulated Compartments under High Pressure

Cited by 7 publications

References 2 publications

Comparison of the Breakdown Strength of N2, CO2 and SF6 using the Extended Up-and-Down Method

Comparison of the Breakdown Strength of N2, CO2 and SF6 using the Extended Up-and-Down Method

Breakdown Characteristics of Plasma Closing Switch Filled With Air, N2, CO2, and Ar/O2

Study on the Effect of Helium on the Dielectric Strength of Medium-Voltage Vacuum Interrupters

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Breakdown Characteristics of Plasma Closing Switch Filled With Air, N₂, CO₂, and Ar/O₂