Research on Interruption Performance of Environmentally Friendly C 4 F 7 N Mixed-Gas-Insulated Switchgear

Chenxi Bian, Baina He (), Xin Lin, Yujia Liu, Hui Lou, Lingzhe Kong, Xueting Dai, Shuo Wu, Fantao Meng and Yang Liu
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Chenxi Bian: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Baina He: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Xin Lin: Key Laboratory of Special Machine and High Voltage Apparatus, Ministry of Education, Shenyang University of Technology, Shenyang 110000, China
Yujia Liu: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Hui Lou: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Lingzhe Kong: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Xueting Dai: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Shuo Wu: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Fantao Meng: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Yang Liu: College of Electric and Electronic Engineering, Shandong University of Technology, Zibo 255000, China

Energies, 2022, vol. 15, issue 18, 1-14

Abstract: SF 6 , which is currently widely used in gas-insulated power transmission equipment, is a greenhouse gas with a very strong greenhouse effect. Therefore, developing environmentally friendly gas insulation equipment to gradually reduce the use of SF 6 has become a hot research topic. As the most potential alternative gas, C 4 F 7 N is of great significance to study the electrical characteristics of the medium-voltage switching field to promote the green development of the power industry. Based on multi-physical field coupling to construct the 40.5 kV circuit breaker mode, this paper uses C 4 F 7 N/CO 2 mixed gas to compare and study the dynamic characteristics of a C 4 F 7 N/CO 2 mixed gas circuit breaker when breaking the short-circuit current and the dielectric recovery strength with no-load breaking, as well as to evaluate the electrical performance of C 4 F 7 N mixed gas in a 40.5 kV breaker with the gas breakdown criterion. The results show that mixing O 2 in a high current can improve the breaking performance of an environmental protection circuit breaker and increasing the C 4 F 7 N mass fraction can enhance the dielectric recovery strength of the environmentally friendly circuit breaker. Considering the overall performance of the gas, the 5%C 4 F 7 N/90% CO 2 /5%O 2 mixed gas has some alternative potential.

Keywords: eco-friendly insulating gas; self-blasting circuit breaker; multi-physics coupling; dielectric recovery property; C 4 F 7 N (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
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