AC Breakdown Characteristics of CF<sub>3</sub>I-N<sub>2</sub> Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field

DENG Yunkun; MA Yi; CHEN Xianfu; ZHANG Shaoquan; CHEN Xiaoyun; XIAO Dengming

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AC Breakdown Characteristics of CF₃I-N₂ Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field

更新时间：2025-12-08

- AC Breakdown Characteristics of CF₃I-N₂ Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field
- Vol. 43, Issue 3, Pages: 754-764(2017)
- 作者机构：
  
  1. 云南电网有限责任公司博士后工作站
  2. 上海交通大学电气工程系
  3. 云南电网有限责任公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：10 March 2017，
  
  Published：2017
- 稿件说明：
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DENG Yunkun, MA Yi, CHEN Xianfu, et al. AC Breakdown Characteristics of CF₃I-N₂ Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field[J]. 2017, 43(3): 754-764.
DOI：

DENG Yunkun, MA Yi, CHEN Xianfu, et al. AC Breakdown Characteristics of CF₃I-N₂ Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field[J]. 2017, 43(3): 754-764. DOI：

摘要

三氟碘甲烷（CF3I）是近年来被认为最有可能替代六氟化硫（SF

）的环保型绝缘气体之一。通过建立CF3I混合气体绝缘性能试验平台

对CF3I-N

二元混合气体在不同体积分数（20%和30%）、气压（0.1

.3 MPa）、放电间隙（5

0 mm）以及电场不均匀系数（针–板模型和球–板模型）下的工频击穿特性进行了研究

揭示了CF3I-N

混合气体工频击穿电压受CF3I体积分数、间隙距离、气压以及电场不均匀度等因素的影响规律。结果表明

在稍不均匀电场中

CF3I-N

混合气体的工频击穿电压随放电间距的增大而增大

同时随气压的升高线性增加。在极不均匀电场中

CF3I-N

混合气体的工频击穿电压近似于随间隙的增大线性增加

但击穿电压随气压的变化出现了不同程度的饱和现象。与SF

气体相比

CF3I体积分数为20%和30%的CF3I-N

混合气体能够分别达到纯SF

气体50%和55%以上的工频耐压水平。

Abstract

Trifluoroiodomethane（CF

I） has been broadly proposed as a potential replacement for SF

.AC breakdown tests on CF

I-N

gas mixtures have been completed in the condition of quasi-homogeneous and extremely non-uniform electric field

focusing on the CF

I-N

gas mixtures with volume fraction of 20% and 30% CF

gas pressure from 0.1 MPa to 0.3 MPa

and gap distance from 5 mm to 30 mm.On the basis of the foregoing analyses of breakdown characteristics

we reveal the effect laws of CF

I volume fraction

gap distance

gas pressure

and electric field non-uniform coefficient on the power frequency breakdown voltage of CF

I gas mixtures.The AC breakdown voltages of CF

I-N

gas mixtures linearly increase with the gas pressure and gap distance under quasi-homogeneous field.In the condition of non-uniform field

the AC breakdown voltages of CF

I-N

gas mixtures approach to saturation with the increasing of gas pressure.The experimental results indicate that CF

I-N

gas mixtures with CF

I volume fraction of 20% and 30% can achieve nearly 50% and 55% power frequency withstand voltage of pure SF

respectively.

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AC Breakdown Characteristics of CF3I-N2 Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field

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AC Breakdown Characteristics of CF₃I-N₂ Gas Mixtures in Condition of Quasi-homogeneous and Extremely Non-uniform Electric Field