Investigation of Arc Dynamic Behavior Change Induced by Various Parameter Configurations for C 4 F 7 N/CO 2 Gas Mixture

Wen Wang (), Xianglian Yan, Beiyang Liu and Yalin Bian
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Wen Wang: China Electric Power Research Institute, Beijing 100192, China
Xianglian Yan: China Electric Power Research Institute, Beijing 100192, China
Beiyang Liu: China Electric Power Research Institute, Beijing 100192, China
Yalin Bian: China Electric Power Research Institute, Beijing 100192, China

Energies, 2024, vol. 17, issue 14, 1-16

Abstract: This study investigates the feasibility of using a mixture of C 4 F 7 N/CO 2 gases as an eco-friendly arcing medium for high-voltage circuit breakers, comparing its performance to that of conventional SF 6 gas. An existing magnetohydrodynamic (MHD)-based arc model is modified to incorporate the non-recombination characteristics of C 4 F 7 N. The temperature, pressure, and velocity distributions of the arc throughout the whole arcing process are systematically analyzed. First, the differences in multi-physical fields induced by the C 4 F 7 N non-recombination feature are highlighted. The effects of varying the C 4 F 7 N concentration from 4% to 10% in the C 4 F 7 N/CO 2 gas mixture on the arc behavior are also computationally studied. The results indicate significant differences in the arc-extinguishing performance between C 4 F 7 N/CO 2 and SF 6 under identical operating conditions. The potential of using C 4 F 7 N/CO 2 as a viable alternative to SF 6 in circuit breaker applications may need further design efforts to optimize key components such as the driving mechanism and nozzle. Moreover, as the concentration of C 4 F 7 N increases, the gas mixture exhibits improved flow field characteristics, suggesting that a higher volume concentration of C 4 F 7 N enhances the gas’s short-circuit current interruption capabilities.

Keywords: C 4 F 7 N/CO 2; arc dynamic behavior; magnetohydrodynamic-based arc model; non-recombination feature (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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