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Influence of oxygen on solid carbon formation during arcing of eco-friendly SF6-alternative gases.
- Source :
- Journal of Physics D: Applied Physics; 9/7/2023, Vol. 56 Issue 36, p1-13, 13p
- Publication Year :
- 2023
-
Abstract
- During the arc breaking process of high-voltage circuit breakers, the eco-friendly SF<subscript>6</subscript>-alternative gases will inevitably decompose and generate various decomposition products. In some cases, this will contain solid by-products such as solid carbon, which will have a deterioration effect on the electrical insulation performance of the equipment. It has been found that adding a proper amount of O<subscript>2</subscript> can effectively inhibit the formation of solid carbon. In this paper, based on the improved Gibbs free energy minimization method, a calculation model considering the solid decomposition products was established, and the arc plasma composition of CO<subscript>2</subscript>/O<subscript>2</subscript> mixtures with the new eco-friendly gases, such as C<subscript>4</subscript>F<subscript>7</subscript>N, C<subscript>5</subscript>F<subscript>10</subscript>O, HFO-1234ze(E) and HFO-1336mzz(E), in local thermodynamic equilibrium state was calculated. The change of decomposition products with the initial O<subscript>2</subscript> ratio is studied, and the criterion expression of inhibiting solid carbon formation is obtained. We also applied the method to the calculation of other SF<subscript>6</subscript>-alternative gases containing sulfur atoms such as NSF<subscript>3</subscript> and CF<subscript>3</subscript>SO<subscript>2</subscript>F. Finally, we showed that solid carbon can be inhibited when a proper molecule formula is satisfied. This work may provide new ideas for further exploring the potential of SF<subscript>6-</subscript>alternative gases. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00223727
- Volume :
- 56
- Issue :
- 36
- Database :
- Complementary Index
- Journal :
- Journal of Physics D: Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 164307695
- Full Text :
- https://doi.org/10.1088/1361-6463/acd64e