Study on Generation and Diffusion Characteristics of Acetylene Under High Voltage Bushing Fault of Transformer

SHEN Leyu; ZHANG Wei; CHEN Chuan; ZHU Xuran; MENG Yanzong; LIU Bo; CHEN Siyang

doi:10.13296/j.1001-1609.hva.2025.10.003

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Study on Generation and Diffusion Characteristics of Acetylene Under High Voltage Bushing Fault of Transformer

Key New Technologies for Equipment Condition Monitoring and Fault Diagnosis in New Power System Research on Fault Mechanisms of Key Power Equipment in New Power System | 更新时间：2025-10-21

- Study on Generation and Diffusion Characteristics of Acetylene Under High Voltage Bushing Fault of Transformer
- High Voltage Apparatus Vol. 61, Issue 10, Pages: 21-29(2025)
- 作者机构：
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- DOI：10.13296/j.1001-1609.hva.2025.10.003
  CLC：
- Received：19 March 2025，
  
  Revised：2025-06-11，
  
  Published：16 October 2025
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SHEN Leyu, ZHANG Wei, CHEN Chuan, et al. Study on Generation and Diffusion Characteristics of Acetylene Under High Voltage Bushing Fault of Transformer[J]. High voltage apparatus, 2025, 61(10): 21-29.
DOI：

SHEN Leyu, ZHANG Wei, CHEN Chuan, et al. Study on Generation and Diffusion Characteristics of Acetylene Under High Voltage Bushing Fault of Transformer[J]. High voltage apparatus, 2025, 61(10): 21-29. DOI： 10.13296/j.1001-1609.hva.2025.10.003.

摘要

针对变压器高压套管故障中C

气体生成机制不明确及产气后扩散行为难以预测的问题，开展了油纸在过热与击穿故障条件下的产气实验。研究表明，在过热温度达到800℃时，随着温度升高，相同时间间隔内采集的油样中乙炔含量逐渐增加；在击穿放电过程中，C

成为主要气体产物。此外，利用有限元方法对乙炔气体在不同注气位置、初始温度及温度梯度下的扩散特性进行了仿真研究。结果显示，均温条件下，注气点位置、油流状态及温度分布显著影响气体扩散速度及体积分数分布，且不同注气点设置会导致扩散路径的变化。非均温条件下，温度梯度对乙炔气体扩散速率、路径及最终体积分数分布起到关键作用。通过实验验证了仿真结果的准确性，为变压器油中C

气体扩散现象的预测提供了可靠手段。

Abstract

In view of the issues that the generation mechanism of C

gas in the fault of transformer high-voltage bushing is unclear and the diffusion behavior after gas generation is difficult to be predicted

the gas generation experiment of oil-paper under overheating and breakdown fault conditions is carried out. The study shows that in c

ase of overheating temperature reaching 800℃

with the increase of temperature

the acetylene content in the oil samples collected within the same time interval gradually increases. During the breakdown discharge process

becomes the main gas product. In addition

the diffusion characteristics of acetylene gas under different gas injection positions

initial temperatures and temperature gradients are simulated by using the finite element method. The results show that under uniform temperature conditions

the injection point position

oil flow state and temperature distribution significantly affect the gas diffusion rate and concentration distribution

and different gas injection point settings will lead to changes in the diffusion path. Under non-uniform temperature conditions

the temperature gradient plays a key role in the diffusion rate

path and final concentration distribution of acetylene gas. The accuracy of the simulation results is verified by experiments

providing a reliable means for predicting the diffusion phenomenon of C

gas in transformer oil.

关键词

Keywords

references

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