基于铜箔—多层油纸绝缘结构的局部放电特性研究

原子超; 赵正宇; 武宏斌; 任富强; 李清泉

doi:10.13296/j.1001-1609.hva.2026.09.011

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基于铜箔—多层油纸绝缘结构的局部放电特性研究

绝缘介质与放电机理研究 | 更新时间：2026-09-10

- 基于铜箔—多层油纸绝缘结构的局部放电特性研究
- Study on Partial Discharge Characteristics Based on Copper Foil-multilayer Oil-pressboard Insulation Structure
- 高压电器 2026年62卷第9期页码：99-107
- 作者机构：
  
  山东大学山东省先进输变电技术与智能装备重点实验室，济南 250061
- 作者简介：
  
  原子超（2003—），男，硕士研究生，主要研究方向为油纸绝缘劣化及其改性（E-mail：202534786@mail.sdu.edu.cn）。
  任富强（1990—），男，博士，副研究员，主要研究方向为新型电力系统构建背景下电力设备多场耦合分析及可靠性提升、绝缘劣化机理、绝缘状态评估、人工智能在电力设备中的应用（通信作者）（E-mail：renfuqiang@sdu.edu.cn）。
- 基金信息：
  
  国家自然科学基金联合基金重点项目;National Natural Science Foundation of China Joint Fund Key Projects(U25B20199);国家自然科学基金青年科学基金项目;Young Scientists Fund of the National Natural Science Foundation of China(52307180)
- DOI：10.13296/j.1001-1609.hva.2026.09.011
  中图分类号：
- 收稿：2026-03-21，
  
  修回：2026-05-20，
  
  纸质出版：2026-09-16
- 稿件说明：
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原子超, 赵正宇, 武宏斌, 等. 基于铜箔—多层油纸绝缘结构的局部放电特性研究[J]. 高压电器, 2026,62(9):99-107.

YUAN Zichao, ZHAO Zhengyu, WU Hongbin, et al. Study on Partial Discharge Characteristics Based on Copper Foil-multilayer Oil-pressboard Insulation Structure[J]. High Voltage Apparatus, 2026, 62(9): 99-107.
原子超, 赵正宇, 武宏斌, 等. 基于铜箔—多层油纸绝缘结构的局部放电特性研究[J]. 高压电器, 2026,62(9):99-107. DOI： 10.13296/j.1001-1609.hva.2026.09.011.

YUAN Zichao, ZHAO Zhengyu, WU Hongbin, et al. Study on Partial Discharge Characteristics Based on Copper Foil-multilayer Oil-pressboard Insulation Structure[J]. High Voltage Apparatus, 2026, 62(9): 99-107. DOI： 10.13296/j.1001-1609.hva.2026.09.011.

摘要

电力变压器主绝缘、绕组层间及绕组导体附近绝缘均为油纸绝缘结构，纸层厚度、油纸界面数量和铜箔导体层分布不同，局部放电特征存在显著差异。为分析相近绝缘厚度下结构差异对交流局部放电的影响，制备单层厚油纸、多层薄油纸和铜箔—多层薄油纸试样，采用脉冲电流法于针板电极模型测量局部放电起始电压（

PDIV

），获取相位分辨局部放电和时间分辨局部放电谱图，并统计放电重复率和平均放电量。结果表明，3类试样

PDIV

分别为5.73、8.42、10.19 kV；加压120 min时，多层薄油纸放电重复率最高，约82次/s，铜箔—多层薄油纸平均放电量最高，约199 pC。多层界面增强放电重复率，铜箔层提高放电强度，应联合谱图和统计特征来评估放电发展状态。

Abstract

The main insulation

inter-winding layer insulation and insulation near winding conductors of power transformers are all oil-pressboard insulation structures. However

due to differences in pressboard layer thickness

the number of oil-pressboard interfaces and the distribution of copper foil conductor layers

the partial discharge characteristics exhibit significant variations. To analyze the influence of structural differences on AC partial discharge under similar insulation thicknesses

the samples of single-layer thick oil-pressboard

multi-layer thin oilpressboard and copper foil-multilayer thin oil-pressboard are prepared. The partial discharge inception voltage (

PDIV

)is measured using the pulse current method in a needle-plate electrode model

the phase-resolved partial discharge and time-resolved partial discharge patterns are obtained

and the discharge repetition rate and average discharge magnitude are calculated. The results show that the

PDIV

of the three samples are 5.73 kV

8.42 kV and 10.19 kV

respectively. After voltage application for 120 minutes

the multi-layer thin oil-pressboard sample has the highest

discharge repetition rate

approximately 82 times/s

while the copper foil-multilayer thin oil-pressboard sample has the highest average discharge magnitude

approximately 199 pC. Multi-layer interfaces increase the discharge repetition rate

while the copper foil layer enhances the discharge intensity. The discharge development status shall be assessed by combining discharge patterns with statistical features.

关键词

Keywords

references

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