Dielectric Performance of CO2 Gas Compared with N2 Gas

Shiiki, Motoharu; Sato, Masayuki; Hanai, Masahiro; Suzuki, Koji

doi:10.1007/978-1-4615-0583-9_51

Cited by 9 publications

(6 citation statements)

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“…The 50% breakdown strength of CO 2 on application of positive polarity impulse is higher than that of negative polarity impulse. Similar observation has been reported in [6], [19], where the breakdown tests were performed under various electrode arrangements.…”

Section: Breakdown In Co 2 In Weakly Non-homogeneous Field (Rod-plane)supporting

confidence: 87%

Electrical Breakdown Study in CO₂ and CO₂-O₂ Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Kumar

Huiskamp

Pemen

et al. 2021

IEEE Trans. Dielect. Electr. Insul.

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In this paper, the results of AC, DC and 2/160 µS impulse electrical breakdown experiments of CO 2 and CO 2-O 2 mixtures in weak and strongly non-uniform fields are presented. In weakly non-uniform fields, the electrical breakdown field approximately follows 11 when stressed with both AC and DC (positive and negative) waveforms. For positive impulse, the breakdown voltage is higher and the time lag to breakdown is scattered, indicating a lack of starting electrons from CO 2 gas. The breakdown strengths of CO 2-O 2 (10-30%) mixtures is investigated. On application of negative polarity impulse, the breakdown strength is significantly higher than positive impulse in the measured pressure range of 0.3-0.7 MPa in strongly non-uniform fields, contrary to that seen during breakdown in weakly non-uniform fields. Breakdown voltage for negative impulse is further enhanced in a mixture of CO 2-O 2 (80-20%).

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Section: Breakdown In Co 2 In Weakly Non-homogeneous Field (Rod-plane)supporting

confidence: 87%

Electrical Breakdown Study in CO₂ and CO₂-O₂ Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Kumar

Huiskamp

Pemen

et al. 2021

IEEE Trans. Dielect. Electr. Insul.

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“…Recently, the breakdown characteristics of several electrodes in compressed N 2 have been investigated (11)- (14) . We obtained the breakdown strength of coaxial cylindrical electrodes in N 2 from the reference data shown in Fig.…”

Section: Estimation Of Cross-sectional Size Of Gasinsulated Bus Usingmentioning

confidence: 99%

Lightning Impulse Breakdown Characteristics in Compressed N2 and CO2 and Feasibility of their Gases' Application to Gas-Insulated Buses

2005

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Member SF 6 has been identified as a greenhouse gas with a long atmospheric lifetime. In the long term, it is preferable to reduce the amount of SF 6 used. Therefore, it is important to discuss the possibility of using environmentally friendly gases as alternative insulation gases for practical gas-insulated apparatuses. In the selection of an alternative gas, it is thought that high-pressure natural gases, such as air, nitrogen (N 2 ), and carbon dioxide (CO 2 ), are promising environmentally friendly candidates. In this paper, we describe the basic insulation characteristics of N 2 and CO 2 in the high-pressure range of up to 2.0 MPa under a quasi-uniform electric-field gap and under a non-uniform one in the presence of a metallic particle, and the characteristics are compared with those of SF 6 . Moreover, we discuss the estimation of the cross-sectional size of a gas-insulated apparatus using high-pressure N 2 or CO 2 , based on insulation and thermal designs.

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“…Thus, depending on the properties of the gases, the insulation performance is determined not only by the critical field of the gas but also by imperfections like surface roughness or particulate contamination. This is especially more pronounced at higher pressures of 0.7 to 1 MPa, which is the preferred pressure range for CO 2 -based insulation [25][26][27][28][29][30][31][32][33]. Since CO 2 is the base gas in these mixtures, a good understanding of the insulation characteristics of CO 2 at conditions of practical applications is needed.…”

Section: Introductionmentioning

confidence: 99%

Breakdown at Multiple Protrusions in SF6 and CO2

Feet¹,

Seeger²,

Over³

et al. 2020

Energies

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The electric breakdown at single and multiple protrusions in SF6 and CO2 is investigated at 0.4 and 0.6 MPa, respectively. Additionally, the breakdown fields at rough surfaces of two different areas were determined. From the measurements, breakdown probability distributions for single protrusions were determined and fitted by Weibull distributions. This allowed the determination of statistical enlargement laws for the 50% breakdown probability fields E50. Such enlargement laws describe, for example, the scaling of breakdown field with electrode area or number of protrusions. The predictions were compared to the experimental data, and both agreement and discrepancies were observed depending on polarity and number of protrusions and gas. Discharge predictions including first electron, streamer inception and crossing, as well as leader propagation, gave further insight to this. It was found that predictions from enlargement laws based on statistical processes may not describe the measured breakdown fields well and that relevant physical breakdown criteria must also be considered.

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Dielectric Performance of CO2 Gas Compared with N2 Gas

Cited by 9 publications

References 1 publication

Electrical Breakdown Study in CO₂ and CO₂-O₂ Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Electrical Breakdown Study in CO₂ and CO₂-O₂ Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Lightning Impulse Breakdown Characteristics in Compressed N2 and CO2 and Feasibility of their Gases' Application to Gas-Insulated Buses

Breakdown at Multiple Protrusions in SF6 and CO2

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Dielectric Performance of CO2 Gas Compared with N2 Gas

Cited by 9 publications

References 1 publication

Electrical Breakdown Study in CO2 and CO2-O2 Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Electrical Breakdown Study in CO2 and CO2-O2 Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Lightning Impulse Breakdown Characteristics in Compressed N2 and CO2 and Feasibility of their Gases' Application to Gas-Insulated Buses

Breakdown at Multiple Protrusions in SF6 and CO2

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Electrical Breakdown Study in CO₂ and CO₂-O₂ Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure

Electrical Breakdown Study in CO₂ and CO₂-O₂ Mixtures in AC, DC and Pulsed Electric Fields at 0.1–1 MPa Pressure