A Numerical Study on the Decomposition and Diffusion Characteristics of SF 6 in Gas-Insulated Switchgear with Consideration of the Temperature Rising Effect

Chenglong Jia, Wenbin Zhao, Yong Zhu, Wu Lu and Zhong Tang ()
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Chenglong Jia: College of Electrical Engineering, Shanghai University of Electric Power, Shanghai, No. 2588, Changyang Road, Shanghai 200090, China
Wenbin Zhao: College of Electrical Engineering, Shanghai University of Electric Power, Shanghai, No. 2588, Changyang Road, Shanghai 200090, China
Yong Zhu: Hefei Power Supply Company, No. 133, Susong Road, Hefei 230000, China
Wu Lu: College of Electrical Engineering, Shanghai University of Electric Power, Shanghai, No. 2588, Changyang Road, Shanghai 200090, China
Zhong Tang: College of Electrical Engineering, Shanghai University of Electric Power, Shanghai, No. 2588, Changyang Road, Shanghai 200090, China

Energies, 2022, vol. 15, issue 21, 1-16

Abstract: The optimized concentration of SF 6 gas is the key to maintaining a good insulation performance by GIS equipment. The precise measurements of the SF 6 concentration and decomposition byproducts could be used to indicate the remaining GIS insulation level during long-term operations. In this paper, a finite-element simulation model was created to investigate the SF 6 gas decomposition and diffusion dynamics. A theoretical analysis and simulation of the overheating fault, i.e., the contact between the GIS disconnect switches, were carried out, followed by an estimation of the SF 6 decomposition and diffusion characteristics caused by the local heating faults, based on the calculated flow velocity field and temperature field.

Keywords: GIS disconnect switch; contact overheating; numerical simulation; SF 6 gas diffusion (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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