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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Chenxi Bian & Baina He & Xin Lin & Yujia Liu & Hui Lou & Lingzhe Kong & Xueting Dai & Shuo Wu & Fantao Meng & Yang Liu, 2022. "Research on Interruption Performance of Environmentally Friendly C 4 F 7 N Mixed-Gas-Insulated Switchgear," Energies, MDPI, vol. 15(18), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:18:p:6500-:d:907787
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