Dielectric withstand analysis for high voltage circuit-breakers using g3 and CO2-O2 gas mixtures

Authors

  • V. Issartel GE Vernova, 21 rue Cyprian - BP 1321 , Villeurbanne Cedex, 69611 France
  • S. Gortschakow Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Straße 2, 17489 Greifswald, Germany
  • R. De Holanda Sousa GE Vernova, 21 rue Cyprian - BP 1321 , Villeurbanne Cedex, 69611 France
  • M. Hadi GE Vernova, 21 rue Cyprian - BP 1321 , Villeurbanne Cedex, 69611 France
  • P. Robin-Jouan GE Vernova, 21 rue Cyprian - BP 1321 , Villeurbanne Cedex, 69611 France

Keywords:

high-voltage circuit breaker, dielectric withstand, breakdown, MHD simulation

Abstract

Dielectric behaviour of g3 or CO2/O2 mixtures after current interruption have been studied by numerical model. Arc properties during the arcing phase were determined from two-dimensional axisymmetric time-dependent magneto-hydrodynamic simulations. The probability of arc re-ignition (breakdown) after current interruption have been then estimated from evaluation of streamer criterion for the whole calculation domain. Corresponding input data - critical electric fields and effective ionisation coefficients - have been determined from the solution of kinetic Boltzmann equation for the electrons.

References

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Published

2026-06-05

Issue

Vol. 13 No. 1 (2026)

Section

Articles

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Copyright (c) 2026 V. Issartel, S. Gortschakow, R. De Holanda Sousa, M. Hadi, P. Robin-Jouan

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