Research on Post-arc Insulation Breakdown Characteristics of C<sub>4</sub>F<sub>7</sub>N and Its Gas Mixtures

LI Yong; LIU Gang; WANG Xiuru; JIN Fuyi; ZHANG Yuanming

doi:10.13296/j.1001-1609.hva.2026.06.024

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Research on Post-arc Insulation Breakdown Characteristics of C₄F₇N and Its Gas Mixtures

Research & Analysis | 更新时间：2026-06-10

- Research on Post-arc Insulation Breakdown Characteristics of C₄F₇N and Its Gas Mixtures
- High Voltage Apparatus Vol. 62, Issue 6, Pages: 191-199(2026)
- 作者机构：
  
  国网江苏省电力有限公司宿迁供电分公司，江苏宿迁 223800
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.06.024
  CLC：
- Received：07 November 2025，
  
  Revised：2026-01-15，
  
  Published：16 June 2026
- 稿件说明：
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LI Yong, LIU Gang, WANG Xiuru, et al. Research on Post-arc Insulation Breakdown Characteristics of C₄F₇N and Its Gas Mixtures[J]. High Voltage Apparatus, 2026, 62(6): 191-199. DOI: 10.13296/j.1001-1609.hva.2026.06.024.
DOI：

LI Yong, LIU Gang, WANG Xiuru, et al. Research on Post-arc Insulation Breakdown Characteristics of C₄F₇N and Its Gas Mixtures[J]. High Voltage Apparatus, 2026, 62(6): 191-199. DOI: 10.13296/j.1001-1609.hva.2026.06.024. DOI：

摘要

N是具有潜在应用价值的SF

替代气体。然而，目前对C

N气体的研究以绝缘性能分析为主，对灭弧性能的关注较少。文中研究了温度为300～3 500 K和压力为0.01～0.1 MPa条件下的C

N-CO

混合气体的弧后绝缘击穿性能。首先，通过吉布斯自由能最小化方法得到了不同混合比例下热态C

N-CO

混合气体电弧的粒子组分；然后，采用两项近似玻尔兹曼方程计算了弧后气体的电子能量分布函数、约化电离系数、约化吸附系数以及约化临界击穿场强，并分析了温度、压力和CO

体积分数对弧后热态气体绝缘击穿特性的影响。研究发现，CO

的混入可以显著降低高能电子的浓度，而压力增加通常会导致高能电子的概率密度降低；在700～1 100 K以及2 600～3 500 K的温度范围内，适当增加CO

比例可以提高弧后气体的绝缘击穿性能；然而在低温下，过多的CO

会降低气体介质的绝缘性能。

Abstract

N is a potential alternative gas to SF

with promising application value. However

current research on C

N gas mainly focuses not on the arc interruption performance

but on insulation performance analysis.In this paper the post arc insulation breakdown performance ofC

N-CO

mixtures at temperatures from 300 K to 3 500 K and pressures from 0.01 MPa to 0.1 MPa is studied. First

the partical composition of the arc in hot C

N-CO

gas mixtures under different mixing ratios is obtained using the Gibbs free energ minimization method. Then

the electron energy distribution function

reduced ionization coefficient

reduced attachment coefficient

and reduced critical breakdown field strength of the post arc gas are calculated using the two-term Boltzmann equation. The influence of temperature

pressure

and CO

content on the insulation breakdown characteristics of the hot post-arc are also analyzed. It is found by research that the mixing of CO

can significantly reduce the conc

entration of high-energy electrons

while the increase of pressure generally leads to a decrease in the probability density of high-energy electrons. Appropriately increasing the CO

ratio can improve the insulation breakdown performance within the temperature ranges of 700 K to 1100 K and 2600 K to 3500 K. However

at low temperatures

excessive addition of CO

to the mixture will reduce the insulation breakdown capability.

关键词

Keywords

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⁰

Research on Post-arc Insulation Breakdown Characteristics of C4F7N and Its Gas Mixtures

DOI：10.13296/j.1001-1609.hva.2026.06.024

摘要

Abstract

关键词

Keywords

references

Research on Post-arc Insulation Breakdown Characteristics of C₄F₇N and Its Gas Mixtures