Characteristic analysis of CO<sub>2</sub> switching arcs under a DC current

Zhao, Xinhui; Yan, Joseph; Xiao, Dan

doi:10.1088/2058-6272/aabf34

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The VCB takes the initial TRV, which supplies about 50 μs for the DDR of the GCB, and then the GCB can endure the later TRV. In addition, the insulation of the GCB is linearly increasing with the gap length and pressure so that the static breakdown voltage of the GCB is higher than VCB [18][19][20]. The synergy strategy mainly depended on the DDRP of the VCB and GCB.…”

Section: The Mechanical Hvdc Circuit Breakers Based On Serial Vcb And...mentioning

confidence: 99%

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Cheng¹,

Yang²,

Ge³

et al. 2019

Plasma Sci. Technol.

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Vacuum gaps have rapid dynamic dielectric recovery speed while SF 6 gaps have high insulation strength. The series-connected vacuum and SF 6 gaps are used as the main switch (MS), which combines their advantages. The work aims to verify the feasibility of serial vacuum and SF 6 gaps in mechanical HVDC interruption. The test circuit of the dynamic dielectric recovery performance (DDRP) is set up. The DDRP is tested under free recovery condition by the high voltage pulse source. The DDRP of the vacuum circuit breaker (VCB) and SF 6 gas circuit breaker (GCB) in DC interruption with active current injection is analyzed and compared. The test results indicate that the dielectric recovery duration of the VCB is below 30 μs while that of the GCB is above 100 μs. In order to achieve the cooperation between the VCB and GCB, a novel hybrid HVDC circuit breaker (CB) based on series-connected vacuum and SF 6 gaps is proposed. The 'voltage-zero' duration is created by introducing the follow current loop and there more recovery time for the dielectric recovery of the MS. The voltage distribution is controlled by the voltage dividing method so that the VCB undertakes the initial transient recovery voltage (TRV) and the later TRV is took by the GCB. The theoretical synergy characteristic of the novel HVDC CB is obtained. The paper supplies a new method to improve the custom mechanical HVDC CB, which is useful to achieve the HVDC CB with less serial breaks.

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Section: The Mechanical Hvdc Circuit Breakers Based On Serial Vcb And...mentioning

confidence: 99%

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Cheng¹,

Yang²,

Ge³

et al. 2019

Plasma Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…As a consequence, it is important to reduce the usage of SF 6 gas. Great effort is being made to develop SF 6 -alternative gases, and several CO 2 -based candidates such as CO 2 , CO 2 -C 5 F 10 O, CO 2 -CF 3 I, C 3 F 8 -CO 2 and C 4 F 7 N-CO 2 [1][2][3][4][5][6][7] have already been proposed and studied in recent years.…”

Section: Introductionmentioning

confidence: 99%

Measurement of radial temperature distributions of the blown CO₂ arcs under different conditions

Li¹,

Fan²,

Wu³

et al. 2019

Plasma Sci. Technol.

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In this paper, the radial temperature distributions of the blown CO 2 arcs in a model gas circuit breaker were investigated by optical emission spectroscopy methods. The CO 2 flows with different flow rates (50, 100 and 150 l min −1 ) were created to axially blow the arcs burning in a polymethyl methacrylate (PMMA) nozzle. Discharges with different arc currents (200 and 400 A) were conducted in the experiment. The absolute intensity method was applied for a carbon ionic line of 657.8 nm to obtain the radial temperature profiles of the arc columns at a cross-section 1 mm above the nozzle. The calibration for the intensity of the C II 657.8 nm line was achieved by the Fowler-Milne method with the help of an oxygen atomic line of 777.2 nm. The highest temperature obtained in the arc center was up to 19 900 K when the arc current was 400 A and the CO 2 flow rate was 50 l min −1 , while the lowest temperature in the arc center was about 15 900 K when the arc current was 200 A and the CO 2 flow rate was 150 l min −1 . The results indicate that as the arc current increases, the temperature in the arc center would also increase apparently, and a larger gas flow rate would lead to a lower central temperature in general. It can also be found that the influence of the CO 2 flow rate on the arc temperature was much less than that of the arc current under the present experimental conditions. In addition, higher temperature in the arc center would cause a sharper temperature decrease from the central region towards the edge.

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Research on Motion Characteristics of Arc at Low Air Pressure

Dong

Qian

et al. 2023

2023 Panda Forum on Power and Energy (PandaFPE)

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Characteristic analysis of CO₂ switching arcs under a DC current

Cited by 3 publications

References 23 publications

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Measurement of radial temperature distributions of the blown CO₂ arcs under different conditions

Research on Motion Characteristics of Arc at Low Air Pressure

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Characteristic analysis of CO2 switching arcs under a DC current

Cited by 3 publications

References 23 publications

Dynamic dielectric recovery performance of serial vacuum and SF6 gaps in HVDC interruption and its regulation method

Dynamic dielectric recovery performance of serial vacuum and SF6 gaps in HVDC interruption and its regulation method

Measurement of radial temperature distributions of the blown CO2 arcs under different conditions

Research on Motion Characteristics of Arc at Low Air Pressure

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Product

Resources

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Characteristic analysis of CO₂ switching arcs under a DC current

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Measurement of radial temperature distributions of the blown CO₂ arcs under different conditions