Study on Breakdown Characteristic of Hot SF<sub>6</sub>/CF<sub>4</sub>

SUN Guanglei; LIN Xin; XIA Yalong; XU Jianyuan; GENG Zhenxin; ZHONG Jianying; ZHAO Xiaomin

doi:10.13296/j.1001-1609.hva.2021.03.011

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Study on Breakdown Characteristic of Hot SF₆/CF₄

更新时间：2025-04-26

- Study on Breakdown Characteristic of Hot SF₆/CF₄
- High VoltageApparatus Vol. 57, Issue 3, Pages: 65-70(2021)
- 作者机构：
  
  1. 沈阳工业大学电气工程学院
  2. 平高集团有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.03.011
  CLC： TM213
- Published：2021
- 稿件说明：
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[1]孙广雷,林莘,夏亚龙,徐建源,庚振新,钟建英,赵晓民.热态SF_6/CF_4击穿特性研究[J].高压电器,2021,57(03):65-70.

SUN Guanglei, LIN Xin, XIA Yalong, et al. Study on Breakdown Characteristic of Hot SF₆/CF₄[J]. High voltageapparatus, 2021, 57(3): 65-70.
[1]孙广雷,林莘,夏亚龙,徐建源,庚振新,钟建英,赵晓民.热态SF_6/CF_4击穿特性研究[J].高压电器,2021,57(03):65-70. DOI： 10.13296/j.1001-1609.hva.2021.03.011.

SUN Guanglei, LIN Xin, XIA Yalong, et al. Study on Breakdown Characteristic of Hot SF₆/CF₄[J]. High voltageapparatus, 2021, 57(3): 65-70. DOI： 10.13296/j.1001-1609.hva.2021.03.011.

摘要

热态介质折合临界击穿场强是判断开关设备弧后介质是否发生重击穿的依据

获取热态SF

/CF

的折合临界击穿场强

对于评估和优化SF

/CF

高压开关设备开断特性具有重要意义。文中采用质量作用定律计算压强为0.1～1.6 MPa下SF

/CF

等离子体粒子组分含量

分析300～4 000 K温度范围内混合气体50%SF

/50%CF

随温度变化过程。采用两项近似法求解玻尔兹曼方程

计算不同压强下热态SF

/CF

折合临界击穿场强（E/N）

随温度的变化关系。结果表明:温度低于1 500 K时

（E/N）

几乎不变

约为268.3 Td(1 Td=1×10

-21

);温度高于2 000 K时

由于CF

分解产物CF

（x=1

3）的影响

混合气体（E/N）

高于纯SF

;随着温度的进一步升高

（E/N）

稳定在40 Td左右。最后计算了0.7 MPa下不同比例冷态SF

/CF

有效电离反应系数

并与文献值进行对比

验证文中计算方法和参数的有效性。

Abstract

The converted critical breakdown field strength of the hot medium is the basis for judging whether thepost arc medium of the switchgear has re-strike.To obtain the converted critical breakdown field strength of the hotSF

/CF

is of great significance in evaluating and optimizing the interruption characteristic of

/CF

high voltageswitchgear.In this paper

the composition content of SF

/CF

plasma at pressure intensity of 0.1～1.6 MPa is calcu-lated by the law of mass action and the variation process of 50%SF

/50% CF

gas mixture in the temperature between300 K to 4 000 K is analyzed.Two approximations are used to solve the Boltzmann equation and calculate the varia-tion of critical breakdown field strength（E/N）

of hot SF

/CF

with temperature at different intensity of pressure.Itis shown by the result that when the temperature is lower than 1 500 K

（E/N）

remains almost unchanged and isabout 268.3 Td(1 Td=1×10

-21

).While

when the temperature is higher than 2 000 K

the gas mixture（E/N）

ishigher than pure SF

due to the influence of CF

decomposition product CF

（x=1

3）.With the continuous in-crease of temperature

（E/N）

is stabilized around 40 Td.Finally

the effective ionization coefficients of differentproportions of cold SF

/CF

at 0.7 MPa are calculated and compared with the existing literature value so to verify thevalidity of the calculation method and parameter.

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⁰

Study on Breakdown Characteristic of Hot SF6/CF4

DOI：10.13296/j.1001-1609.hva.2021.03.011

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Study on Breakdown Characteristic of Hot SF₆/CF₄