Analytical Study on Electron Avalanche in Two Different Temperature and Pressure Regions for High-temperature SF6 Gas

High-voltage circuit breakers require a thorough understanding of the dielectric phenomena in the arcing region under non-uniform temperature and pressure conditions. As the first step towards reaching this understanding, we analyzed the development of electron avalanche using one-dimensional flow s...

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Bibliographic Details
Main Authors: Kuroda, Mami, Yokomizu, Yasunobu, Terada, Masanao, Kotsuji, Hideyuki, Shiraishi, Katsuhiko, Urai, Hajime
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
Circuit breakers
Dielectrics
electron avalanche
High-voltage circuit breaker
hot SF 6 gas
Integrated circuit modeling
Ions
Power systems
Sulfur hexafluoride
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Summary:High-voltage circuit breakers require a thorough understanding of the dielectric phenomena in the arcing region under non-uniform temperature and pressure conditions. As the first step towards reaching this understanding, we analyzed the development of electron avalanche using one-dimensional flow simulation considering 26 collisional reactions between electrons, ions, and neutral particles in a high-temperature/low-pressure region and a low-temperature/high-pressure region. The higher critical electric field in the latter region resulted in a lower possibility of electron avalanche development. The effect of electron avalanche in a gas area with largely different critical electric fields can be calculated by using the proposed analysis model for electron avalanche development.
ISSN:2643-9816
DOI:10.1109/ICEPE-ST51904.2022.9757123