Analysis of Dielectric Breakdown of Hot SF 6 Gas in a Gas Circuit Breaker

Analysis of Dielectric Breakdown of Hot SF 6 Gas in a Gas Circuit Breaker

This paper presents the analysis of the dielectric characteristics of a hot $SF_6$ gas in a gas circuit breaker. Hot gas flow is analyzed using the FVFLIC method considering the moving boundary, material properties of real $SF_6$ gas, and arc plasma. In the arc model, the re-absorption of the emitte...

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Veröffentlicht in:Journal of electrical engineering & technology 2010, Vol.5 (2), p.264-269
Hauptverfasser: Kim, Hong-Kyu, Chong, Jin-Kyo, Song, Ki-Dong
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Song, Ki-Dong
description This paper presents the analysis of the dielectric characteristics of a hot $SF_6$ gas in a gas circuit breaker. Hot gas flow is analyzed using the FVFLIC method considering the moving boundary, material properties of real $SF_6$ gas, and arc plasma. In the arc model, the re-absorption of the emitted radiation is approximated with the boundary source layer where the re-absorbed radiation energy is input as an energy source term in the energy conservation equation. The breakdown criterion of a hot gas is predicted using the critical electric field as a function of temperature and pressure. To validate the simulation method, breakdown voltage for a 145kV 40kA circuit breaker was measured for various conditions. Consistent results between the simulation and experiment were confirmed.
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title Analysis of Dielectric Breakdown of Hot SF 6 Gas in a Gas Circuit Breaker
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