Partial discharges and breakdown in SF<sub>6</sub>in the pressure range 25–150 kPa in non-uniform background fields

Seeger, Martin; Clemen, Martin

doi:10.1088/0022-3727/47/2/025202

Cited by 16 publications

(17 citation statements)

References 17 publications

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“…Also, the deviation from l s according to (2) is largest at lowest pressure, where the streamer radius is highest, which also would favour 'overlapping' or interaction of streamers. This is also in agreement, qualitatively and quantitatively regarding the length, with previous investigations [36].…”

Section: Streamer Lengthsupporting

confidence: 93%

“…The average streamer channel field is equal to the critical field in cold conditions. For the weakly non-uniform field arrangement a significant deviation from the expected corona extension was found in agreement with [36]. Possible reasons for the deviation have been discussed.…”

Section: Discussionsupporting

confidence: 73%

“…A possible explanation for a discrepancy might be the effect of the presence of space charges, which might change the electric field distribution and by this change the discharge behaviour. This is usually referred to as 'corona stabilization' [15,36] and is not taken into account in the model. It is unlikely that this effect is of relevance here, since the large polarity effect was observed without pre-breakdown discharge activity.…”

Section: Streamer Radiusmentioning

confidence: 99%

“…This possibility can be excluded due to two reasons. First, a similar setup was used in a previous investigation [36], where the plug electrode was prepared with and without a (similar) protrusion. No differences regarding the streamer length have been found for both cases.…”

Section: Streamer Lengthmentioning

confidence: 99%

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Experimental investigation of streamer radius and length in SF₆

Bujotzek¹,

Seeger²,

Schmidt³

et al. 2015

J. Phys. D: Appl. Phys.

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SF 6 has for decades been widely used in high voltage insulation and switching applications, e.g. in gas insulated switchgear. Despite its widespread use some important parameters, like the properties of streamers, are still not sufficiently understood. Since breakdown in SF 6 always occurs via the streamer-leader transition the streamer properties are decisive for leader inception and, therefore, breakdown of the insulation. Important parameters are, for example, the streamer radius and the streamer propagation length of arrested streamers. Such properties enter in breakdown prediction models. In the present study the streamer radius and the propagation length were investigated experimentally at 50 and 100 kPa for both polarities using strongly and weakly non-uniform background fields. No experimental information was available so far for negative polarity. The resulting streamer radius scaling agrees with previous experimental results for positive polarity and with expectations from breakdown models for negative polarity. These results were similar for strongly non-uniform and weakly non-uniform background fields. A difference between the two setups was observed for the streamer lengths. It was found that for strongly non-uniform fields the streamer length scales as expected with the critical electric field but with a different field for weakly non-uniform background fields. This was similar for both polarities.

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Section: Streamer Lengthsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 73%

Section: Streamer Radiusmentioning

confidence: 99%

Section: Streamer Lengthmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation of streamer radius and length in SF₆

Bujotzek¹,

Seeger²,

Schmidt³

et al. 2015

J. Phys. D: Appl. Phys.

Self Cite

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show abstract

“…Relevant scholars around the world have carried out a considerable of research on the breakdown characteristics of SF 6 and achieved fruitful results. The investigations on factors, such as forms of applied voltage (including impulse, steady-state, or DC) [26]- [28], field distributions [29]- [30], voltage waveform parameters [30]- [32], and voltage polarities [33] affecting the breakdown characteristics of SF 6 were performed. The models of breakdown of SF 6 in inhomogeneous gaps were established and the mechanisms were clarified [27], [34], [35].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Electric Field Inhomogeneity on Repetitive Performance of a Corona-Stabilized Switch

Huang

Yang

2020

IEEE Access

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The corona-stabilized switch has a great potential in pulsed power systems where high pulse repetition frequencies are required. Corona discharge in SF 6 in highly inhomogeneous electric field is utilized to improve repetitive performance of this kind of switch. To clarify how the repetitive performance (insulation recovery and repetitive breakdown stability) of the switch depends on the field inhomogeneity, the insulation recovery and repetitive breakdown stability of a corona-stabilized switch are experimentally investigated and theoretically analyzed. An innovative double-pulse method combining breakdown voltage and discharge channel images is used to measure the insulation recovery of the switch. For different electrodes, their voltage jitters at pulse repetition frequencies of 1-2000 Hz are measured to illustrate the stability of repetitive breakdown. The experimental results are theoretically analyzed from the memory effect and behavior characteristics of the residual plasma, the critical volume and its dynamic characteristics. The results reveal the corona stabilization enhancement effect during the repetitive breakdown in SF 6 in extremely inhomogeneous field. The influence of electrode profile on the propagation of discharge channel shock wave, the decay of residual plasma and the recovery of neutral gas density are clarified. Effect of the electrostatic conditions, including the critical volume and its dynamic characteristics, and the intensity of corona discharge, on the repetitive performance of the switch are also clarified. INDEX TERMS Corona stabilization, electric field inhomogeneity, gas discharge devices, insulation recovery, memory effect.

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Some Aspects of Current Interruption Physics in High Voltage Circuit Breakers

Seeger

Galletti

Bini

et al. 2014

Contrib. Plasma Phys.

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Recent results of experimental and theoretical investigations on current interruption processes are presented with a focus on SF6 high voltage circuit breakers. Various aspects of thermal interruption at the zero crossing of the current are shown, including the scatter and the distribution of arc voltage shortly before CZ and the role of turbulence. The thermal interruption capability of air and CO2 are compared to that of SF6. Investigations on the dielectric recovery are shown for SF6 and CO2. The breakdown voltage during the dielectric recovery can be described by simple streamer and leader inception models. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Partial discharges and breakdown in SF₆in the pressure range 25–150 kPa in non-uniform background fields

Cited by 16 publications

References 17 publications

Experimental investigation of streamer radius and length in SF₆

Experimental investigation of streamer radius and length in SF₆

The Influence of Electric Field Inhomogeneity on Repetitive Performance of a Corona-Stabilized Switch

Some Aspects of Current Interruption Physics in High Voltage Circuit Breakers

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Partial discharges and breakdown in SF6in the pressure range 25–150 kPa in non-uniform background fields

Cited by 16 publications

References 17 publications

Experimental investigation of streamer radius and length in SF6

Experimental investigation of streamer radius and length in SF6

The Influence of Electric Field Inhomogeneity on Repetitive Performance of a Corona-Stabilized Switch

Some Aspects of Current Interruption Physics in High Voltage Circuit Breakers

Contact Info

Product

Resources

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Partial discharges and breakdown in SF₆in the pressure range 25–150 kPa in non-uniform background fields

Experimental investigation of streamer radius and length in SF₆

Experimental investigation of streamer radius and length in SF₆