Prediction of the breakdown voltage in SF6 under corona stabilization

Ibrahim, O.E.

doi:10.1016/0378-7796(85)90041-0

Cited by 2 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This direct transition mode from streamer discharge to spark discharge is called 'streamer breakdown', as inherited from Niemeyer's model. The breakdown voltage estimation method we used in this study was first proposed by Ibrahim [33]. The breakdown criterion is considered to be the electric field threshold on the surface of the grounded electrode.…”

Section: Images Of Pre-breakdown Dischargementioning

confidence: 99%

Neglected culprit of nonlinear discharge characteristics in SF₆: shielding effect induced by positive glow corona discharge

Zhang

et al. 2019

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

The discharge characteristics of SF 6 dependent on gas pressure under extremely inhomogeneous electric fields are strongly nonlinear and must be carefully considered when optimizing gasinsulated equipment insulation design and defect detection. The main aim of this study was to determine the relationship between nonlinear breakdown characteristics and the pre-breakdown discharge mode transition. The breakdown model established by Niemeyer, as adapted under impulse voltage, was expanded. The images and the phase-resolved patterns of the prebreakdown discharge as a function of gas pressure and applied voltage were analyzed to observe the relationship between them as per the spatial distribution of the spark paths. A universal model of the nonlinear breakdown phenomenon under steady-state voltage was established accordingly. Experimental results demonstrate the existence of a positive glow corona (PGC) discharge in the interval with the discontinuous breakdown voltage as well as significant interactions between the PGC discharge and leader discharge. The nonlinear characteristics can be attributed to the inception and quenching of the PGC discharge. The shielding effect induced by the PGC discharge is the neglected culprit of the strong nonlinear discharge characteristics under steady-state voltage. The nonmonotonic U-p curve in electronegative gases was also assessed in an effort to build a theoretical basis for the manufacture and condition monitoring of the gas-insulated equipment.

show abstract

Section: Images Of Pre-breakdown Dischargementioning

confidence: 99%

Neglected culprit of nonlinear discharge characteristics in SF₆: shielding effect induced by positive glow corona discharge

Zhang

et al. 2019

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The breakdown voltage can be regarded as the streamer inception voltage, which can be calculated as determined in our previous study [21]. In the streamer breakdown region, the static field breakdown criterion of SF 6 (breakdown occurs when the electric field strength on the plate surface exceeds 45 kV mm −1 MPa −1 ) can be used to calculate the breakdown voltage dominated by streamer discharge [12]. The key step in the calculation is to characterize the electric field in the presence of a corona current.…”

Section: Estimation Of N-curvementioning

confidence: 99%

“…Ibrahim, Niemeyer, and Onal attempted to estimate breakdown voltage by calculation [6,12,13]. Early experiments were mostly performed in wire-cylinder electrodes, the ion current can be calculated due to the 1D analytical form of the Poisson equation solution.…”

Section: Introductionmentioning

confidence: 99%

“…Early experiments were mostly performed in wire-cylinder electrodes, the ion current can be calculated due to the 1D analytical form of the Poisson equation solution. Accordingly, Ibrahim assessed the effects of the ion current on the electric field and predicted the breakdown voltage in the corona stabilization region using the static field breakdown criterion [12]. Niemeyer established a series of physical models (e.g., leader inception, stem formation, precursor propagation) to estimate the breakdown voltage caused by a leader mechanism [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electric field dependence of SF₆ nonlinear discharge characteristics: N-curve estimations

Lin

Fan

et al. 2021

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

The N-curve of SF6 describes the relationship between the AC breakdown voltage in an extremely inhomogeneous electric field and pressurized SF6 gas. It is directly dependent on the electric field distribution, which is determined by the gas gap, curvature radius, and background electric field. An increase in gap distance, a decrease in curvature radius, and relatively weak background electric field are all conducive to corona stabilization. The electrode curvature radius is the determining factor in the positive glow corona (PGC) discharge quenching pressure. The breakdown voltage dominated by the streamer mechanism can be estimated accurately by calculating the electric field based on the Deutsch assumption and combining it with the SF6 static field breakdown criterion. The proposed method is applicable to the estimation of N-curves in gaps with varying field distributions. The work presented in this paper may support further quantitative research on the discharge mechanism of strongly electronegative gas dielectrics.

show abstract

Prediction of the breakdown voltage in SF6 under corona stabilization

Cited by 2 publications

References 6 publications

Neglected culprit of nonlinear discharge characteristics in SF₆: shielding effect induced by positive glow corona discharge

Neglected culprit of nonlinear discharge characteristics in SF₆: shielding effect induced by positive glow corona discharge

Electric field dependence of SF₆ nonlinear discharge characteristics: N-curve estimations

Contact Info

Product

Resources

About

Prediction of the breakdown voltage in SF6 under corona stabilization

Cited by 2 publications

References 6 publications

Neglected culprit of nonlinear discharge characteristics in SF6: shielding effect induced by positive glow corona discharge

Neglected culprit of nonlinear discharge characteristics in SF6: shielding effect induced by positive glow corona discharge

Electric field dependence of SF6 nonlinear discharge characteristics: N-curve estimations

Contact Info

Product

Resources

About

Neglected culprit of nonlinear discharge characteristics in SF₆: shielding effect induced by positive glow corona discharge

Neglected culprit of nonlinear discharge characteristics in SF₆: shielding effect induced by positive glow corona discharge

Electric field dependence of SF₆ nonlinear discharge characteristics: N-curve estimations