Influence of Moisture on the Space Charge Characteristics of Multi-layer Oil Impregnated Insulation Paper Under Different DC Electric Field

WU Gaolin; XIE Song; HAO Jian; WANG Qian; FU Jin

doi:10.13296/j.1001-1609.hva.2014.12.003

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Influence of Moisture on the Space Charge Characteristics of Multi-layer Oil Impregnated Insulation Paper Under Different DC Electric Field

更新时间：2025-04-26

- Influence of Moisture on the Space Charge Characteristics of Multi-layer Oil Impregnated Insulation Paper Under Different DC Electric Field
- High VoltageApparatus Vol. 50, Issue 12, Pages: 14-18+23(2014)
- 作者机构：
  
  1. 国网重庆市电力公司电力科学研究院
  2. 国网重庆市电力公司运维检修部
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2014.12.003
  CLC： TM855
- Published：2014
- 稿件说明：
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[1]吴高林,谢松,郝建,王谦,伏进.不同直流场强下水分对多层油浸绝缘纸空间电荷生成和迁移的影响[J].高压电器,2014,50(12):14-18+23.

WU Gaolin, XIE Song, HAO Jian, et al. Influence of Moisture on the Space Charge Characteristics of Multi-layer Oil Impregnated Insulation Paper Under Different DC Electric Field[J]. High voltageapparatus, 2014, 50(12): 14-18+23.
[1]吴高林,谢松,郝建,王谦,伏进.不同直流场强下水分对多层油浸绝缘纸空间电荷生成和迁移的影响[J].高压电器,2014,50(12):14-18+23. DOI： 10.13296/j.1001-1609.hva.2014.12.003.

WU Gaolin, XIE Song, HAO Jian, et al. Influence of Moisture on the Space Charge Characteristics of Multi-layer Oil Impregnated Insulation Paper Under Different DC Electric Field[J]. High voltageapparatus, 2014, 50(12): 14-18+23. DOI： 10.13296/j.1001-1609.hva.2014.12.003.

摘要

空间电荷问题是影响变压器油纸绝缘材料耐电强度

导致其绝缘故障的重要因素。针对水分对油纸绝缘电气性能的危害

文中采用基于电声脉冲法的空间电荷测试系统研究了不同水分含量油浸绝缘纸在直流场强20、30、40 k V/mm下的空间电荷特性。结果表明:加压过程中

水分对油浸绝缘纸内部空间电荷分布产生很大影响。油浸绝缘纸试品水分含量越高

其内部积聚的电荷量越少

油纸界面对电荷的阻挡作用也越弱;在油浸绝缘纸试品击穿前

试品内部仅积聚少量的负电荷

空间电荷在两电极间快速导通

是导致油浸绝缘纸试品击穿的主因。

Abstract

Space charge could constrain and impact the electric strength of transformer oil-paper insulation.It is also the important factor that leads to oil paper insulation aging and causes insulation failure.Due to the harmful influence of moisture on the electrical properties of oil-paper insulation

the space charge characteristics of oil immersed insulation paper with different moisture content under the DC field 20 k V/mm

30 k V/mm and 40 k V/mm were investigated using the pulsed electro-acoustic method.Results show that the moisture has a significant impact on the space charge distribution of oil-immersed insulation paper in the process of electric field applied.The higher the moisture content of the oil-paper insulation sample

the less the amount of charge accumulation is.Besides

the barrier role of the paper-paper interface is also weaker.There is only accumulating a small amount of negative charges before the breakdown of the oil-paper insulation sample.The fast conduction of the space charges between the two electrodes is the main cause of the breakdown of the oil-paper insulation sample.

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