Study on FDS Characteristics of Oil-paper Insulated Bushing Under Non-duniform Moisture Contents Based on Finite Element Analysis

JIANG Jiongting; LI Chao; FENG Xinyuan; XU Lulin; ZHANG Daning

doi:10.13296/j.1001-1609.hva.2026.09.014

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Study on FDS Characteristics of Oil-paper Insulated Bushing Under Non-duniform Moisture Contents Based on Finite Element Analysis

Research on Insulation Medium and Discharge Mechanisms | 更新时间：2026-09-10

- Study on FDS Characteristics of Oil-paper Insulated Bushing Under Non-duniform Moisture Contents Based on Finite Element Analysis
- High Voltage Apparatus Vol. 62, Issue 9, Pages: 129-138(2026)
- 作者机构：
  
  国网浙江省电力有限公司宁波供电公司，浙江宁波 315016
  西安交通大学电工材料电气绝缘全国重点实验室，西安 710049
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.09.014
  CLC：
- Received：11 March 2026，
  
  Revised：2026-05-09，
  
  Published：16 September 2026
- 稿件说明：
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JIANG Jiongting, LI Chao, FENG Xinyuan, et al. Study on FDS Characteristics of Oil-paper Insulated Bushing Under Non-duniform Moisture Contents Based on Finite Element Analysis[J]. High Voltage Apparatus, 2026, 62(9): 129-138.
DOI：

JIANG Jiongting, LI Chao, FENG Xinyuan, et al. Study on FDS Characteristics of Oil-paper Insulated Bushing Under Non-duniform Moisture Contents Based on Finite Element Analysis[J]. High Voltage Apparatus, 2026, 62(9): 129-138. DOI： 10.13296/j.1001-1609.hva.2026.09.014.

摘要

针对传统频域介电谱（FDS）分析基于均匀受潮假设，难以准确反映油纸绝缘套管实际存在的不均匀受潮问题，提出了一种基于有限元仿真与实验相结合的不均匀受潮介电响应分析方法。利用Comsol建立双单元叠层FDS仿真模型，并建立套管的均匀与不均匀受潮模型，系统分析水分含量及其空间分布对介电响应的影响。结果表明，不均匀受潮会使tan

曲线出现明显损耗峰及波动特征，且不均匀程度越大，损耗峰频率及曲线交点频率越高，介电响应对末屏局部受潮较为敏感。仿真与实验一致性良好，为油纸绝缘不均匀受潮状态的识别与定量评估提供了新的技术手段，对提升电力设备绝缘状态精准诊断具有重要意义。

Abstract

In view of the issue that the traditional frequency domain spectroscopy(FDS)analysis is based on the assumption of uniform moisture ingress

which make it difficult to accurately reflect the non-uniform moisture distribution actually existed in oil paper insulated bushings

a dielectric response analysis method for non-uniform moisture ingress is proposed based on the combination of inite element simulation with experimental validation. A dual-unit stacked FDS simulation model is established using Comsol

along with uniform and non-uniform moisture distribution models for the bushing. The effects of moisture content and its spatial distribution on the dielectric response are systematically analyzed. The results indicate that non-uniform moisture induces distinct loss peaks and fluctuation characteristics in the tan

curves. The greater the degree of non-uniformity

the higher the frequencies of the loss peak and th curve intersection point

indicating that the dielectric response is relatively sensitive to l

ocalized moisture end screen. Both simulations and experiments are in good agreement

which provides a new technical means for identifying and quantitatively assessing non-uniform moisture distribution in oil-paper insulation

and is of great significance for advancing accurate insulation diagnosis of power equipment.

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references

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