高压电器2025，Vol.61Issue(10)：21-29,9.DOI:10.13296/j.1001-1609.hva.2025.10.003
变压器高压套管故障下乙炔生成规律及其扩散特性研究
Study on Generation and Diffusion Characteristics of Acetylene Under High Voltage Bushing Fault of Transformer
摘要
Abstract
In view of the issues that the generation mechanism of C2H2 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 exper-iment of oil-paper under overheating and breakdown fault conditions is carried out.The study shows that in case 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,C2H2 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 sig-nificantly 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 simula-tion results is verified by experiments,providing a reliable means for predicting the diffusion phenomenon of C2H2 gas in transformer oil.关键词
变压器套管/过热故障/击穿故障/油纸产气/乙炔/气体扩散/温度梯度/有限元仿真Key words
transformer bushing/overheating fault/breakdown fault/oil-paper gas production/acetylene/gas diffusion/temperature gradient/finite element simulation引用本文复制引用
沈乐宇,张伟,陈川,朱煦然,蒙延宗,刘博,陈巳阳..变压器高压套管故障下乙炔生成规律及其扩散特性研究[J].高压电器,2025,61(10):21-29,9.基金项目
国家电网有限公司总部管理科技项目(5700-202335249A-1-1-ZN).Project Supported by Science and Technology Project of State Grid Corporation of China(5700-202335249A-1-1-ZN). （5700-202335249A-1-1-ZN）
