Variation Characteristics of Dissolved Gas in Oil for Oil-paper Insulated Bushing Under Fault Simulation

LIU Qin; LUO Xiaoqing; XIE Xiongjie; LIU Taiwei; HU Wei; YE Qiming

doi:10.13296/j.1001-1609.hva.2026.07.019

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Variation Characteristics of Dissolved Gas in Oil for Oil-paper Insulated Bushing Under Fault Simulation

Research & Analysis | 更新时间：2026-07-06

- Variation Characteristics of Dissolved Gas in Oil for Oil-paper Insulated Bushing Under Fault Simulation
- High Voltage Apparatus Vol. 62, Issue 7, Pages: 182-192(2026)
- 作者机构：
  
  中国电力科学研究院有限公司电网环境保护全国重点实验室，武汉 430074
- 作者简介：
- 基金信息：
  
  Science and Technology Project of SGCC(5500-202140114A-0-0-00)
- DOI：10.13296/j.1001-1609.hva.2026.07.019
  CLC：
- Received：15 December 2025，
  
  Revised：2026-02-11，
  
  Published：16 July 2026
- 稿件说明：
移动端阅览
LIU Qin, LUO Xiaoqing, XIE Xiongjie, et al. Variation Characteristics of Dissolved Gas in Oil for Oil-paper Insulated Bushing Under Fault Simulation[J]. High Voltage Apparatus, 2026, 62(7): 182-192.
DOI：

LIU Qin, LUO Xiaoqing, XIE Xiongjie, et al. Variation Characteristics of Dissolved Gas in Oil for Oil-paper Insulated Bushing Under Fault Simulation[J]. High Voltage Apparatus, 2026, 62(7): 182-192. DOI： 10.13296/j.1001-1609.hva.2026.07.019.

摘要

少油类设备通过内部填充绝缘油进行内绝缘，在发生放电或过热故障时，会引起绝缘油劣化而产生H

、烃类气体、CO、CO

等溶解气体，严重时会导致设备爆炸。文中模拟了油纸绝缘套管放电类（绝缘受潮、主绝缘设计、工艺缺陷）和过热类（载流结构件故障）典型故障，并对故障套管油中溶解气体进行监测。研究结果表明4种绝缘故障下，产气量由小到大依次为层间气泡、绝缘受潮、主绝缘设计缺陷和极板缺陷；故障套管施加额定电压下，会产生局部放电，会持续产生H

4种绝缘故障H

的产气速率随加压时间呈现缓慢增长并逐渐趋于饱和的趋势；4种绝缘故障下C

的产气速率随加压时间呈现先缓慢增长后快速增长的趋势，快速增长出现的时间不同，其中极板缺陷和主绝缘设计缺陷后期C

产气速率增长较快，绝缘受潮和层间气泡后期C

产气速率增长较缓。载流结构件缺陷套管烃类气体产气量由少到多分别为C

、CH

、C

体积分数较H

多，总烃产气量较绝缘放电大，H

的产气速率随加压时间呈现持续缓慢增长的趋势，但载流结构件缺陷下H

产气速率较绝缘缺陷慢，C

产气速率较绝缘缺陷快。文中主要结论对于少油类设备产气下的故障分析具有重要的意义。

Abstract

For oil-less equipment

internal insulation is achieved by filling with insulating oil. In case of discharge or overheating faults

the insulating oil deteriorates

generating such dissolved gases as H

hydrocarbons

CO and CO

. Under severe cases

this may cause equipment to explore. In this paper such typical faults of oil-paper insulation bushing as discharge type（insulation moisture

main insulation design and process defects）and overheating type （fault of current-carrying structure）are simulated

and the dissolved gas in the oil in the fault bushing is monitored. The study results show that

under four types of insulation faults

the gas production volume in ascending order is interlayer bubble

insulation moisture

design effect in the main insulation and electrode plate defect. In case of applying rated voltage on the fault bushing

partial discharge will generated and H

is continuously generated. For four types of insulation faults

the gas generation rate of H

shows a slow increase and gradually tends to saturation with the voltage application time. The gas generation rate of C

under four types of insulation faults shows a trend of slow increase at first and then rapid increase with voltage application time. The occurrence time of fast increase is different

in which the later-stage C

generation rate increases dhaply for electrode plate defects and main insulation design defects

but increases modestly for insulation moisture and interlayer bubble. The hydrocarbon gas generation volume of the fault bushing of the current-carrying structural parts from less to more isC

and C

the volume fractino of C

is more than that of H

The total hydrocarbon gas generation volume is larger than insulation discharge

the gas generation rate of H

shows a continuous and slow increase trend with the voltage appli cation time. However

under the defect of current-carrying structue

the H

gas generation rate is slower than the insulation defect

but the C

gas generation rate is faster than insulation defect. The main

conclusions of this paper are of great significance for fault analysis under gas generation in oil-less equipment.

关键词

Keywords

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