Effect Mechanism of Temperature and Pressure on Local Overheat Decomposition Characteristics of C4F7N/CO2 Gas Mixture

ZHANG Xiaoxing; ZHANG Ji; LI Yi; XIAO Song; CHEN Qi

doi:10.13296/j.1001-1609.hva.2021.03.019

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Effect Mechanism of Temperature and Pressure on Local Overheat Decomposition Characteristics of C₄F₇N/CO₂ Gas Mixture

更新时间：2025-04-26

- Effect Mechanism of Temperature and Pressure on Local Overheat Decomposition Characteristics of C₄F₇N/CO₂ Gas Mixture
- High VoltageApparatus Vol. 57, Issue 3, Pages: 120-128(2021)
- 作者机构：
  
  武汉大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.03.019
  CLC： TM213
- Published：2021
- 稿件说明：
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[1]张晓星,张季,李祎,肖淞,陈琪.温度、气压对C_4F_7N/CO_2混合气体局部过热分解特性的影响机制[J].高压电器,2021,57(03):120-128.

ZHANG Xiaoxing, ZHANG Ji, LI Yi, et al. Effect Mechanism of Temperature and Pressure on Local Overheat Decomposition Characteristics of C₄F₇N/CO₂ Gas Mixture[J]. High voltageapparatus, 2021, 57(3): 120-128.
[1]张晓星,张季,李祎,肖淞,陈琪.温度、气压对C_4F_7N/CO_2混合气体局部过热分解特性的影响机制[J].高压电器,2021,57(03):120-128. DOI： 10.13296/j.1001-1609.hva.2021.03.019.

ZHANG Xiaoxing, ZHANG Ji, LI Yi, et al. Effect Mechanism of Temperature and Pressure on Local Overheat Decomposition Characteristics of C₄F₇N/CO₂ Gas Mixture[J]. High voltageapparatus, 2021, 57(3): 120-128. DOI： 10.13296/j.1001-1609.hva.2021.03.019.

摘要

N气体被认为是最具潜力替代SF

气体的环保型气体绝缘介质。目前

国内外对C

N-CO

混合气体热稳定性及分解特性的相关研究较少。文中试验研究了C

N-CO

混合气体在不同温度、气压条件下的热分解特性。研究发现

0.15 MPa下5%C

N-95%CO

混合气体的热分解起始温度为350℃

首先生成C

和CO

随温度升高还能够检测到CF

、C

、CF

CN、COF

、（CN）

等产物。温度低于450℃条件下

、（CN）

含量随着温度的升高而增加

温度超过500℃开始下降。在350～500℃温度下

CO、C

、CF

CN、COF

含量随温度升高而增加。温度超过500℃后能够检测到CF

该两种成分可以作为严重过热故障的特征。相关研究成果揭示了C

N-CO

混合气体在不同温度和气压条件下的热分解特性

为C

N-CO

混合气体的工程应用提供了参考。

Abstract

N gas is considered to be the most pote

ntial environmentally friendly gas insulating medium to replace SF

gas.At present

the study on the thermal stability and decomposition characteristic of C

N-CO

gas mixture both at home and abroad is less.In this paper

the thermal decomposition characteristic of C

N-CO

gas mixture under different temperature and pressure conditions are studied.It is found by the study that at 0.15 MPa the thermal decomposition initial temperature of 5%C

N-95%CO

gas mixture is 350℃

the C

and CO is generated firstly and

with the increase of temperature

such products as CF

COF

（CN）

etccan also be detected.When the temperature is lower than 450℃

the content of C

and（CN）

increases with the increase of temperature and starts to decrease when the temperature exceeds 500℃.At 350～500℃

the content of CO

COF

increases with the increase of temperature.CF

can be detected after the temperature exceeds 500℃and such two components can be characterized as severe overheating faults.The related research results reveal the thermal decomposition characteristics of C

N-CO

gas mixture at different temperature and pressure conditions

which provides a reference for the engineering application of C

N-CO

gas mixture.

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