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19 October 2022 Study of arc ignition characteristics and opening characteristics of C4F7N/CO2 mixed gas ring main unit
En Yuan Dong, Wei Li, Yong Xing Wang, Li Fan Zhang, Yu Zhu, De Bao An, Bo Lun Liu
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Proceedings Volume 12294, 7th International Symposium on Advances in Electrical, Electronics, and Computer Engineering; 122942M (2022) https://doi.org/10.1117/12.2640470
Event: 7th International Symposium on Advances in Electrical, Electronics and Computer Engineering (ISAEECE 2022), 2022, Xishuangbanna, China
Abstract
This paper establishes a three-dimensional numerical model of a 12 kV gas ring main unit in a C4F7N/CO2 gas mixture during the interrupting process based on a magneto-hydrodynamic model, and uses FLUENT commercial software to simulate and analyze the arc motion and voltage characteristics of the existing 12 kV gas ring main unit interrupting structure in a C4F7N/CO2 gas mixture during the interrupting process. By applying a magnetic field to the interrupter chamber, the effect of magnetic field regulation on the arc motion pattern and arc voltage is investigated, showing that the external magnetic field can make the arc enter the grid more and the arc voltage can be increased, and the arc voltage value will be larger just before the current crosses zero. At the same time, based on the synthetic loop platform, the arc-extinguishing structure of the ring main unit before and after the magnetic field adjustment is studied for its breaking capacity, which shows that the ring main unit can withstand a larger recovery voltage under the action of the external magnetic field and is more conducive to the successful breaking of the ring main unit.
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En Yuan Dong, Wei Li, Yong Xing Wang, Li Fan Zhang, Yu Zhu, De Bao An, and Bo Lun Liu "Study of arc ignition characteristics and opening characteristics of C4F7N/CO2 mixed gas ring main unit", Proc. SPIE 12294, 7th International Symposium on Advances in Electrical, Electronics, and Computer Engineering, 122942M (19 October 2022); https://doi.org/10.1117/12.2640470
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KEYWORDS
Magnetism
Switches
Failure analysis
3D modeling
Atmospheric modeling
Computer simulations
Metals
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