Fundamental Properties of CO&lt;sub&gt;2&lt;/sub&gt; Gas as an Arc Quenching Medium and Thermal Interruption Performance of Full-Scale GCB Model

Uchii, Toshiyuki; Kawano, Hideaki; Nakamoto, Tetsuya; Mizoguchi, H.

doi:10.1541/ieejpes.124.469

Cited by 18 publications

(20 citation statements)

References 8 publications

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“…Load-break switches using air, vacuum, oil and SF 6 have been employed in power systems. Among the arc-quenching media, SF 6 gas is extensively used today because of its excellent arc extinguishing characteristics.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Among the arc-quenching media, SF 6 gas is extensively used today because of its excellent arc extinguishing characteristics. Nonetheless, SF 6 is a greenhouse gas, thus it might contribute to global warming. Therefore, to control the global warming, it is desirous to reduce a leak of SF 6 from electric power apparatus, to use gas mixtures containing a lower content of SF 6 or to replace SF 6 by non-greenhouse gases.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the difference in the arc-extinguishing method and the kind of gases used as interrupting medium can influence the arc characteristics, and thus the breaking performance. As a result, we have so far studied the interrupting capabilities of a puffer-type and a grid-type of load-break switch employing several substitute gases for SF 6 such as H 2 and CO 2 (4) (5) . Even though CO 2 has global warming effect, it is considered as an alternative quenching gas to SF 6 because CO 2 has global-warming potential much lower than SF 6 .…”

Section: Introductionmentioning

confidence: 99%

“…As a result, we have so far studied the interrupting capabilities of a puffer-type and a grid-type of load-break switch employing several substitute gases for SF 6 such as H 2 and CO 2 (4) (5) . Even though CO 2 has global warming effect, it is considered as an alternative quenching gas to SF 6 because CO 2 has global-warming potential much lower than SF 6 . The use of CO 2 as substitute gas for SF 6 has been recently the subject of several research papers (6) .…”

Section: Introductionmentioning

confidence: 99%

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Arc Behavior in Rotary-arc Type of Load-break Switch and its Current-interrupting Capability for Different Environmentally Benign Gases and Electrode Materials

et al. 2005

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MemberIn the purpose to find an alternative gas to SF 6 , this paper describes the results of current-interruption experiment for a rotary-arc type of load-break switch filled with CO 2 , H 2 , He and SF 6 at an absolute pressure of 0.1 MPa in case of ring electrode made of stainless steel. In addition, in case of the switch filled with CO 2 , current-interruption experiments were also performed for the ring electrode made of copper. The interrupting capability was found to be higher in order of SF 6 , H 2 , CO 2 and He. Moreover, the switch proved to have the higher current-interrupting capability for the copper than for the stainless steel. The phenomenon was found to arise from change in magnetic flux in an inner space of a ring electrode, depending the electrode material. This change in the magnetic flux also proved to result from variation of a resistance of the ring electrode.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Arc Behavior in Rotary-arc Type of Load-break Switch and its Current-interrupting Capability for Different Environmentally Benign Gases and Electrode Materials

et al. 2005

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Measurements of Electron Density and Electron Temperature of Arc Discharge Plasmas Containing Metallic Vapors Using Laser Thomson Scattering

Tomita

Yoshitake

Uchino

et al. 2014

Electrical Engineering Japan

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Laser Thomson scattering (LTS) was applied to arc discharges generated in the atmosphere to measure electron density (n e ) and electron temperature (T e ). The electrode gap was 0.8 mm, and the electrode diameter was 1 mm. The applied voltage was 6 kV, the peak current was 600 A, and the decay time of the voltage and current was 25 μs. The spatiotemporal evolution of n e and T e was measured 10, 30, and 50 μs after discharge initiation. At these times, the obtained values of n e and T e were estimated to be in the ranges of (0.8 to 2.0) × 10 23 m −3 and 1.0 to 2.2 eV, respectively. These values were consistent with those evaluated using Saha's thermodynamic equation at 1 atm. It was also found that the decay of the arc discharge produced using the tungsten-copper electrodes was much faster than that produced using the tungsten electrodes. C⃝ 2014 Wiley Periodicals, Inc. Electr Eng Jpn, 188(4): 1-8, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Guo

Zhao

et al. 2015

Journal of Applied Physics

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The influence of copper vapor mixed in hot CO2 on dielectric breakdown properties of gas mixture at a fixed pressure of 0.4 MPa for a temperature range of 300 K–4000 K is numerically analyzed. First, the equilibrium composition of hot CO2 with different copper fractions is calculated using a method based on mass action law. The next stage is devoted to computing the electron energy distribution functions (EEDF) by solving the two-term Boltzmann equation. The reduced ionization coefficient, the reduced attachment coefficient, and the reduced effective ionization coefficient are then obtained based on the EEDF. Finally, the critical reduced electric field (E/N)cr is obtained. The results indicate that an increasing mole fraction of copper markedly reduces (E/N)cr of the CO2–Cu gas mixtures because of copper's low ionization potential and large ionization cross section. Additionally, the generation of O2 from the thermal dissociation of CO2 contributes to the increase of (E/N)cr of CO2–Cu hot gas mixtures from about 2000 K to 3500 K.

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Fundamental Properties of CO<sub>2</sub> Gas as an Arc Quenching Medium and Thermal Interruption Performance of Full-Scale GCB Model

Cited by 18 publications

References 8 publications

Arc Behavior in Rotary-arc Type of Load-break Switch and its Current-interrupting Capability for Different Environmentally Benign Gases and Electrode Materials

Arc Behavior in Rotary-arc Type of Load-break Switch and its Current-interrupting Capability for Different Environmentally Benign Gases and Electrode Materials

Measurements of Electron Density and Electron Temperature of Arc Discharge Plasmas Containing Metallic Vapors Using Laser Thomson Scattering

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

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