Variation Research on Dissolved Gas Generation of Overheating Faults in Oil-paper Insulation System

ZHANG Guozhi; LIU Xiang; HUANG Yalan; YAN Weiyang; ZHANG Xiaoxing

doi:10.13296/j.1001-1609.hva.2026.08.006

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Variation Research on Dissolved Gas Generation of Overheating Faults in Oil-paper Insulation System

Research & Analysis | 更新时间：2026-08-12

- Variation Research on Dissolved Gas Generation of Overheating Faults in Oil-paper Insulation System
- High Voltage Apparatus Vol. 62, Issue 8, Pages: 43-50(2026)
- 作者机构：
  
  湖北工业大学新能源及电网装备安全监测湖北省工程研究中心，武汉 430000
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.08.006
  CLC：
- Received：11 February 2026，
  
  Revised：2026-04-09，
  
  Published：16 August 2026
- 稿件说明：
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ZHANG Guozhi, LIU Xiang, HUANG Yalan, et al. Variation Research on Dissolved Gas Generation of Overheating Faults in Oil-paper Insulation System[J]. High Voltage Apparatus, 2026, 62(8): 43-50.
DOI：

ZHANG Guozhi, LIU Xiang, HUANG Yalan, et al. Variation Research on Dissolved Gas Generation of Overheating Faults in Oil-paper Insulation System[J]. High Voltage Apparatus, 2026, 62(8): 43-50. DOI： 10.13296/j.1001-1609.hva.2026.08.006.

摘要

油面气体检测法是一种能有效预防油浸式电力变压器绝缘故障进一步劣化导致设备安全事故发生的技术手段，而关于油浸式电力变压器过热故障油面特征气体变化规律缺失。基于此，文中搭建了油浸式电力变压器过热故障下油面气体产气规律研究试验平台，通过大量实验系统研究了不同严重程度过热故障下油面气体的产气规律，实验结果表明：①过热故障下油面特征气体以H

、CH

、CO和C

为主，特征气体体积分数和生成速率会随着故障严重程度的加剧而增加，其中油面上H

体积分数可以达到上万μL/L。②在低温过热试验初期，C

、C

、CO未出现在采集到的油面气体中，但中温过热下7种特征气体均会出现在油面上并被检测到。③中低温过热下，H

生成速率远大于其他6种特征气体。④相较于低温过热，中温过热下H

、CO和CO

的生成速率有明显提升。文中研究成果可为基于油面特征气体的变压器内部过热故障诊断、预警提供技术支撑。

Abstract

The dissolved gas detection analysis(DGA)is a technical means that can effectively prevent equipment safety accidents caused by the progressive deterioration of insulation failures in oil-immersed power transformers

yet there is a significant lack of study on the variation of characteristic gases specific to overheating fault. Based on this

in this paper a test platform to study the production of dissolved gas under thermal fault of oil-immersed power transformer is setup

and the gas production of dissolved gas under overheating fault of different severity is studied through a large number of experimental systems. The experimental results show that:①Under overhating fault

the characteristic of dissolved gas is mainlyH

COand C

and the concentration and generation rate of characteristic gas can increase with the severity of the fault

in which the concentration of H

in the dissolved gas can reach tens of thousands of μL/L.②At the initial stage of low temperature overheating test

and CO do not appear in the collected dissolved gas

but seven characteristic gases would appear on the dissolved gas and can be detected under medium temperature overheating.③At medium and low temperature overheating

the generation rate

of H

is much higher than that of other six characteristic gases.④Compared with low temperature overheating

the formation rate of H

CO and CO

under medium temperature overheating is significantly increased. The research results in this paper can provide technical support for the diagnosis and early warnming of internal overheating fault in transformer based on dissollved characteristic gas in oil.

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