Research on the Insulation Perofmrance of SF<sub>6</sub>/N<sub>2</sub> Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen

ZHANG Xiaoqin; ZHU Hongbin; YU Xiang; ZHU Hui

doi:10.13296/j.1001-1609.hva.2026.10.022

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Research on the Insulation Perofmrance of SF₆/N₂ Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen

Research & Analysis | 更新时间：2026-10-14

- Research on the Insulation Perofmrance of SF₆/N₂ Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen
- High Voltage Apparatus Vol. 62, Issue 10, Pages: 193-202(2026)
- 作者机构：
  
  国网江苏省电力有限公司电力科学研究院，南京 211103
  河南省日立信股份有限公司，郑州 450001
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.10.022
  CLC：
- Received：13 May 2025，
  
  Revised：2025-11-20，
  
  Published：16 October 2026
- 稿件说明：
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ZHANG Xiaoqin, ZHU Hongbin, YU Xiang, et al. Research on the Insulation Perofmrance of SF₆/N₂ Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen[J]. High Voltage Apparatus, 2026, 62(10): 193-202. DOI: 10.13296/j.1001-1609.hva.2026.10.022.
DOI：

ZHANG Xiaoqin, ZHU Hongbin, YU Xiang, et al. Research on the Insulation Perofmrance of SF₆/N₂ Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen[J]. High Voltage Apparatus, 2026, 62(10): 193-202. DOI: 10.13296/j.1001-1609.hva.2026.10.022. DOI：

摘要

在现代电力系统中，SF

混合气体因优良的绝缘性能和相对环保的特点得到了广泛应用。然而现实应用中SF

混合气体中若混入H

O和O

将对混合气体的绝缘性能造成严重影响。因此，文中开展了微水微氧影响下SF

混合气体绝缘性能的研究。通过实验探究了不同微水微氧含量下SF

混合气体的绝缘性能，分析了微水微氧含量变化对击穿电压的影响。建立了考虑微水的SF

混合气体多场耦合数值计算模型，得到了不同微水含量下电场分布规律，从理论上揭示了微水导致SF

混合气体绝缘性能下降的作用机制。研究结果表明，当微水含量低于500 μL/L时，SF

混合气体的绝缘性能不会受到明显影响；当微水含量高于500 μL/L时，随着微水含量的增加，SF

混合气体的绝缘性能不断降低；当微水含量高于1 000 μL/L时，SF

混合气体的绝缘性能大幅下降。文中研究结果为提升电力设备中SF

混合气体的绝缘可靠性、推动SF

替代技术发展以及保障电力系统安全稳定运行提供理论依据。

Abstract

In modern power systems

gas mixture has been widely used due to its excellent insulating performance and relatively environmentally friendly features. However

in practical applications

the presence of H

O and O

in SF

gas mixture can seriouslyaffect its insulation performance. Therefore

in this paper research on the insulation performance of SF

gas mixture under the influence of micro moisture and micro oxygen is performed. Through experiments

the insulation performance of SF

gas mixture with different micro moisture and micro oxygen is investigated by experiments

and the influence of variations in micro moisture micro oxygen contents on the breakdown voltage is analyzed. A multi-field coupling numerical calculation model of SF

gas mixture considering micro moisture is established

and the electric field distribution under different micro moisture contents is obtained. Theoretically

e action mechanism by which micro moisture leads to the decline in the insulation performance of SF

gas mixture is revealed. The research results show that when the micro moisture content is lower than 500 μL/L

the insulation performance of the SF

gas mixture will not be significantly affected. When the micro moisture content is higher than 500 μL/L

with the increase in the micro moisture content

the insulation performance of the SF

gas mixture continuously decreases. When the micro moisture content is higher than 1000 μL/L

the insulation performance of the SF

gas mixture reduces significantly. The research results in this paper provide a theoretical basis for improving the insulation reliability of SF

gas mixture in power equipment

promoting the development of SF

substitution technologies

and ensuring the safe and stable operation of power systems.

关键词

Keywords

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⁰

Research on the Insulation Perofmrance of SF6/N2 Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen

DOI：10.13296/j.1001-1609.hva.2026.10.022

摘要

Abstract

关键词

Keywords

references

Research on the Insulation Perofmrance of SF₆/N₂ Gas Mixture Under the Influence of Micro Moisture and Micro Oxygen