The Study of SF6 Mixtures with Buffer Gases

Chalmers, I.D.; Qiu, X.Q.; Coventry, P.F.

doi:10.1007/978-1-4615-4899-7_26

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…The erosion effect of dissociated SF 6 particles can be mitigated by diluting SF 6 with other gases [14,21]. This study investigated the repetition performance of SF 6 -N 2 and SF 6 -air mixtures, exploring their potential as replacements for pure SF 6 in corona-stabilized switches with high PRFs.…”

Section: Gas Typementioning

confidence: 99%

Factors and Underlying Mechanisms That Influence the Repetitive Breakdown Characteristics of Corona-Stabilized Switches

Li,

Wang,

et al. 2023

Applied Sciences

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The corona-stabilized switch has the potential to be a high repetition rate pulsed-power switching device, but there has been limited investigation into its repetitive breakdown stability and insulation recovery characteristics. Repetitive breakdowns of gas are characterized by a memory effect, where the subsequent breakdown process is inevitably influenced by the preceding one. However, there are still some issues that require further exploration in the current research on the mechanism of memory effect on repetitive breakdown characteristics. To clarify the factors and mechanisms that affect the repetitive breakdowns of corona-stabilized switches, this paper introduced optical observation methods into the experimental investigation. Through optical–electrical coupled diagnosis, the repetitive breakdown stability and insulation recovery performance of corona-stabilized switches under different working conditions and repetition frequencies were analyzed. The monotonic promoting effect of corona stabilization on switch insulation strength recovery is proposed as well as the non-monotonic and complex regulatory mechanism of corona stabilization on repetitive breakdown stability. The research results provide a theoretical and practical basis for clarifying the mechanism of repetitive corona-stabilized breakdowns and optimizing the design of corona-stabilized switches.

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Section: Gas Typementioning

confidence: 99%

Factors and Underlying Mechanisms That Influence the Repetitive Breakdown Characteristics of Corona-Stabilized Switches

Li,

Wang,

et al. 2023

Applied Sciences

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Performance of SF6 Gas Mixtures in High-Voltage Circuit Breakers

Knobloch

Habedank

2001

Gaseous Dielectrics IX

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Influence of additional dielectric coatings on the electrode surfaces on selected parameters of acoustic emission signals in high-voltage gas insulation systems

2021

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The paper is devoted to the study of impact of additional dielectric coatings placed on the surface of the electrodes on the operation of a high-voltage insulation system with air as insulating medium. The study mainly focused on measurement of partial discharges (PDs) with the use of acoustic emission method. Tests were conducted in various levels of chamber pressure. Applicable parameters of recorded signals were analyzed with the use of applications developed in the environment of MATLAB software. The results of analyses clearly show that presence of additional coatings has impact on signal parameters and thus indirectly on PDs. The use of coatings reduces the duration of a single pulse (event) and increases its amplitude. Furthermore, the influence of degradation of the coating caused by individual discharges on the values of the analyzed parameters was analyzed. The study has shown, however, that this effect is negligible.

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The Study of SF6 Mixtures with Buffer Gases

Cited by 6 publications

References 5 publications

Factors and Underlying Mechanisms That Influence the Repetitive Breakdown Characteristics of Corona-Stabilized Switches

Factors and Underlying Mechanisms That Influence the Repetitive Breakdown Characteristics of Corona-Stabilized Switches

Performance of SF6 Gas Mixtures in High-Voltage Circuit Breakers

Influence of additional dielectric coatings on the electrode surfaces on selected parameters of acoustic emission signals in high-voltage gas insulation systems

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