Quantitative Evaluation Research on Moisture Content and Aging State of Transformer Oil-paper Insulation

CAO Jianjun; SUI Bin; YANG Feibao; YIN Xiaobing

doi:10.13296/j.1001-1609.hva.2018.01.021

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Quantitative Evaluation Research on Moisture Content and Aging State of Transformer Oil-paper Insulation

更新时间：2025-04-26

- Quantitative Evaluation Research on Moisture Content and Aging State of Transformer Oil-paper Insulation
- High VoltageApparatus Vol. 54, Issue 1, Pages: 143-151+157(2018)
- 作者机构：
  
  1. 雅砻江流域水电开发有限公司
  2. 西南交通大学电气工程学院
  3. 四川电力设计咨询有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.01.021
  CLC： TM855
- Published：2018
- 稿件说明：
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[1]曹建军,隋彬,杨飞豹,尹小兵.变压器油纸绝缘水分含量和老化程度定量评估研究[J].高压电器,2018,54(01):143-151+157.

CAO Jianjun, SUI Bin, YANG Feibao, et al. Quantitative Evaluation Research on Moisture Content and Aging State of Transformer Oil-paper Insulation[J]. High voltageapparatus, 2018, 54(1): 143-151+157.
[1]曹建军,隋彬,杨飞豹,尹小兵.变压器油纸绝缘水分含量和老化程度定量评估研究[J].高压电器,2018,54(01):143-151+157. DOI： 10.13296/j.1001-1609.hva.2018.01.021.

CAO Jianjun, SUI Bin, YANG Feibao, et al. Quantitative Evaluation Research on Moisture Content and Aging State of Transformer Oil-paper Insulation[J]. High voltageapparatus, 2018, 54(1): 143-151+157. DOI： 10.13296/j.1001-1609.hva.2018.01.021.

摘要

为了分离绝缘纸老化程度和水分对频域介电谱的影响及提高变压器绝缘纸老化程度和水分含量评估精度

文中通过开展加速热老化试验制备了老化程度和含水量均不相同的5组油纸绝缘试样

并对各组试样进行tanδ频谱测试。试验结果表明

在10-3

0-1Hz频段内

tanδ曲线随绝缘纸老化程度增加而上升;在10-3

02Hz频段内tanδ曲线随绝缘纸含水量增大显著上升

在特征频段10-1

02Hz和10-3

0-1Hz内求取tanδ曲线对频率的积分值Sm和SDP分别作为表征水分含量和老化程度的特征量

并分别给出了特征量与绝缘纸水分含量（Kw）和聚合度（DP）之间的拟合关系。对比分析相同老化程度下水分含量不同的多组油纸绝缘试样的介损频谱特性表明

绝缘纸含水量对特征量SDP影响极大

为此提出了水分补偿因子以量化绝缘纸含水量对老化评估的影响

并进一步提出了全面考虑水分影响的老化程度评估新方法。

Abstract

In order to distinguish the influence of aging state and moisture on frequency domain spectroscopy andimprove the accuracy of assessing aging state and moisture content of oil-paper insulation

in this paper

throughconducting accelerated thermal aging experiment

five groups of oil-paper insulation samples with different agingstate and moisture content are prepared

and then the tanδ spectrum for each group of specimens is performed test.The testing results show that in the bands of 10-3

0-1 Hz

the tanδ value increases with aging degree

hile in theband of 10-3

02 Hz

the tanδ value significantly increases with moisture content

obtains the integral value of Sm andSDPto tanδ curve in feature band of 10-1

02 Hz and 10-3

0-1 Hz as characteristic parameters to assess moisturecontent and aging state

and establishes quantitative relationship among characteristic parameters moisture content（Kw）and degree of polymerization（DP）. Through comparing and analyzing the dielectric loss spectrum

the resultshow that the moisture content in insulating paper had great influence on characteristic parameters SDP. Therefore

inthis paper proposes moisture compensation factor to quantitatively analyze the influence of the moisture content toaging assessment

and further puts forward the new method to assess the aging state of oil-paper insulation whichcomprehensively considering the influence of moisture content in insulating paper.

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