Streamer and leader discharge propagation characteristics leading to breakdown in electronegative gases

Hayakawa, Naoki; Hatta, Kazumi; Okabe, S.; Ōkubo, H.

doi:10.1109/tdei.2006.1667744

Cited by 39 publications

(40 citation statements)

References 7 publications

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“…Arrested leader discharges could only be observed starting at 0.15 MPa. Their characteristics are similar to leader discharges in SF 6 and C 2 F 6 , as described by Hayakawa [35]. Figure 3(c) shows a typical arrested leader discharge.…”

Section: Discharge Phenomenasupporting

confidence: 76%

Partial discharges and breakdown in C₃F₈

Koch¹,

Franck²

2014

J. Phys. D: Appl. Phys.

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Abstract. Traditional search processes of gases or gas mixtures for replacing SF 6 involve time consuming measurements of partial discharges and breakdown behaviour for several voltage waveforms and different field configurations. Recently a model for prediction of this behaviour for SF 6 was described in literature. The model only requires basic properties of the gas such as the critical field strength and the effective ionization coefficient, which can be obtained by swarm parameter measurements, and thermodynamic properties, which can be calculated. In this paper, we show for the well-known and electronegative gas octafluoropropane (C 3 F 8 ) that it is possible to transfer the model developed for SF 6 to this gas to describe the breakdown behaviour of C 3 F 8 . Thus the model can be beneficial in the screening process of new insulation gases.

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Section: Discharge Phenomenasupporting

confidence: 76%

Partial discharges and breakdown in C₃F₈

Koch¹,

Franck²

2014

J. Phys. D: Appl. Phys.

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“…Meanwhile, the breakdown regime extended towards the low‐PRF direction. The formation of a positive space–charge region in high‐pressure nitrogen was probably related to electron depletion in pulse rising and trailing edges, which was supported by the transient corona discharge under a pulsed voltage [30], the electric field step phenomenon observed by Zeng et al [58], and the discharge detour phenomenon observed by Hayakawa et al [59]. Variations of breakdown characteristics were related to the reduction of space‐free electrons in the high‐PRF region and the spatial drift (low DC bias voltage) or diminishment (high DC bias voltage) of the space–charge region in the low‐PRF region [30].…”

Section: Mechanisms and Agents Of Memory Effects In The Repetitivelmentioning

confidence: 98%

“…Furthermore, the dominant memory effect agents are dependent on the pulse timescale considering the possible charge transport after a transient corona discharge [29, 58, 59]. Zhao et al [29] compared different evolution patterns of corona discharges sustained by long‐term repetitive sub‐microsecond pulses ( t pw : 800 ns) and nanosecond pulses ( t pw : 15 ns).…”

Section: Effects Of Waveform Parameters On Discharge Characteristicmentioning

confidence: 99%

Repetitively pulsed gas discharges: memory effect and discharge mode transition

Zhao

2020

High Voltage

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Repetitively pulsed gas volume and dielectric surface discharges have gained growing attention because of peculiar and exciting physics phenomena, high efficiency, high reactivity, and potential to obtain conventionally unachievable plasma properties. Nevertheless, incomplete understanding of fundamental mechanisms renders the repetitively pulsed discharge far less predictable and controllable, where the inherent memory effect and the discharge mode transition are universal challenges. In this topical review, the authors will explore the macroscopic characteristics of the gas gap breakdown and the surface flashover, state‐of‐the‐art mechanisms and dominant agents of discharge memory effects, operation regimes and transitions of the discharge mode, and how waveform parameters affect the pulsed discharge properties. Challenges and potential approaches for further understanding the memory effect and the discharge mode transition in the repetitively pulsed discharge are discussed.

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“…Figure 18b,c show different peak pressure values as function of needle position, for 4%Novec TM 4710/96%CO 2 or CO 2 . According to the pre-breakdown current measurements shown in Figure 5, two modes have been identified in the nonlinear breakdown voltage behaviour as a function of the filling pressure: 0.4 < P ≤ 2 bar abs: The breakdown is led by streamer, corona glow and leader discharges [28,29]. The breakdown occurs at the negative half-cycle peak (see Figure 5a).…”

Section: Discharge Characteristics For An Earthed Needlementioning

confidence: 99%

AC Volume Breakdown and Surface Flashover of a 4% NovecTM 4710/96% CO2 Gas Mixture Compared to CO2 in Highly Nonhomogeneous Fields

et al. 2020

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AC pre-discharge currents, breakdown, and flashover voltage measurements are reported in a 10 mm needle-plane arrangement in a 4% NovecTM 4710/96% CO2 gas mixture and compared with CO2 for pressures up to 8.8 bar abs. Flashover measurements were performed on different solid dielectrics (Al2O3_filled epoxy resins, PTFE (Polytetrafluoroethylene) and PE (polyethylene)) for different roughness surface finishes. The effect of fixed conducting needles at various positions on electrical strength is reported. A strong nonlinear behaviour as function of gas pressure was observed for all the studied parameters (gas, needle position, solid insulator, insulator roughness). The non-linear behaviour is attributed to the inception and quenching of glow corona, in the interval between inception and breakdown or flashover voltages. It is found that a 4% concentration of NovecTM 4710 in CO2 has a breakdown/flashover voltage ≈ 1.14 higher than CO2. The glow corona-induced stabilization effect is seen for pressures between 2 and 5 bar abs for all the studied parameters. The peak flashover voltage and its associated pressure of the different insulators are strongly dependent on surface roughness. At 8.8 bar abs, the flashover voltage level obtained with various materials was ordered as follows: PTFE > PE-UHMW > Epoxy > HDPE(High-density polyethylene).

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Streamer and leader discharge propagation characteristics leading to breakdown in electronegative gases

Cited by 39 publications

References 7 publications

Partial discharges and breakdown in C₃F₈

Partial discharges and breakdown in C₃F₈

Repetitively pulsed gas discharges: memory effect and discharge mode transition

AC Volume Breakdown and Surface Flashover of a 4% NovecTM 4710/96% CO2 Gas Mixture Compared to CO2 in Highly Nonhomogeneous Fields

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Streamer and leader discharge propagation characteristics leading to breakdown in electronegative gases

Cited by 39 publications

References 7 publications

Partial discharges and breakdown in C3F8

Partial discharges and breakdown in C3F8

Repetitively pulsed gas discharges: memory effect and discharge mode transition

AC Volume Breakdown and Surface Flashover of a 4% NovecTM 4710/96% CO2 Gas Mixture Compared to CO2 in Highly Nonhomogeneous Fields

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Partial discharges and breakdown in C₃F₈

Partial discharges and breakdown in C₃F₈