Study on Short Line Fault Interruption Performance of a Circuit Breaker with C4F7N/CO2/O2 Gas Mixture

ZHAO Qi; LIU Shaoyong; LUO Jinwen; WANG Zihan; WANG Haibin; YIN Xiaogang

doi:10.13296/j.1001-1609.hva.2024.09.012

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Study on Short Line Fault Interruption Performance of a Circuit Breaker with C₄F₇N/CO₂/O₂ Gas Mixture

Research on the Electrical and Physicochemical Properties of Environmental-friendly Gas | 更新时间：2025-04-26

- Study on Short Line Fault Interruption Performance of a Circuit Breaker with C₄F₇N/CO₂/O₂ Gas Mixture
- High Voltage Apparatus Vol. 60, Issue 9, Pages: 85-91(2024)
- 作者机构：
  
  1.中国西电电气股份有限公司，西安　 710075
  2.中国长江电力股份有限公司乌东德水电站，昆明　 651500
  3.西安高压电器研究院股份有限公司，西安　 710077
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2024.09.012
  CLC：
- Received：20 May 2024，
  
  Revised：21 July 2024，
  
  Published：16 September 2024
- 稿件说明：
移动端阅览
ZHAO Qi, LIU Shaoyong, LUO Jinwen, et al. Study on Short Line Fault Interruption Performance of a Circuit Breaker with C₄F₇N/CO₂/O₂ Gas Mixture[J]. High voltage apparatus, 2024, 60(9): 85-91.
DOI：

ZHAO Qi, LIU Shaoyong, LUO Jinwen, et al. Study on Short Line Fault Interruption Performance of a Circuit Breaker with C₄F₇N/CO₂/O₂ Gas Mixture[J]. High voltage apparatus, 2024, 60(9): 85-91. DOI： 10.13296/j.1001-1609.hva.2024.09.012.

摘要

六氟化硫（SF

）气体因其具有优良的绝缘与灭弧性能，现已广泛应用于电力设备中，但由于其具有强温室效应，随着全球变暖问题的日益严重，急需寻找能够替代SF

的新型环保气体。其中，全氟异丁腈（C

N）具有优异的绝缘性能，有良好的工程应用前景，然而目前尚无针对C

N/CO

混合气体断路器的近区故障开断特性研究。文中针对126 kV/3 150 A/40 kA柱式C

N混合气体断路器的近区故障开断性能进行研究，对比了断路器充入C

N/CO

混合气体、CO

混合气体和SF

气体在不同电流过零时电流下降率（d

）下的近区故障开断性能。L90近区故障开断实验结果显示，在相同条件下SF

气体表现出最佳的开断性能，能够在较宽的燃弧时间窗口内稳定开断实验电流。0.7 MPa的C

N/CO

混合气体和CO

混合气体在d

=12 A/μs条件下的开断表现与0.5 MPa的SF

气体在d

=20 A/μs条件下的开断表现接近。基于实验结果提出了灭弧室结构的改进方案，并进行了实验验证。文中的研究为C

N混合气体断路器的开发与设计提供了参考。

Abstract

Sulfur hexafluoride (SF

) gas has been widely used in electrical equipment due to its excellent insulation and arc extinguish properties. However

it has strong greenhouse effect. With the increasingly serious problem of global warming

it’s urgent to find new environmentally friendly gases that can replace SF

. Perfluoroisobutyronitrile (C

N) possesses outstanding insulation performance and good engineering application prospect. However

there is no research on short line fault (SLF) interruption characteristics of circuit breaker with for C

N/CO

gas mixture. In this paper

the SLF interruption performance of a 126 kV/3 150 A/40 kA live tank circuit breaker with C

N gas mixture is studied. The SLF interruption performance of the circuit breaker filled with C

N/CO

gas mixture

gas mixture and SF

gas is compared under different current decline rates at current zero (d

). The L90 short line fault interruption test results show that under the same conditions

gas exhibits the best interruption performance and can be able to interrupt the test current within a wider arc duration range. The interruption performance of C

N/CO

gas mixture and CO

gas mixtures at 0.75 MPa under d

=12 A/μs is close to that of SF

at 0.5 MPa under d

=20 A/μs. Based on the test results

an improvement scheme of the interrupter structure is proposed and verified by test. This study in this paper provides a reference for the development and desig

n of circuit breaker with C

N gas mixture.

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