Influence of Moisture Content on Parameters of Return Voltage Measurement in Oil-paper Insulation System of Transformer

GAO Zong-bao; WU Guang-ning; ZHOU Li-jun; LIU Jun; L Wei; ZHAO Hu

doi:10.13296/j.1001-1609.hva.2011.04.010

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Influence of Moisture Content on Parameters of Return Voltage Measurement in Oil-paper Insulation System of Transformer

更新时间：2025-04-26

- Influence of Moisture Content on Parameters of Return Voltage Measurement in Oil-paper Insulation System of Transformer
- High VoltageApparatus Vol. 47, Issue 4, Pages: 37-41(2011)
- 作者机构：
  
  西南交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2011.04.010
  CLC： TM855
- Published：2011
- 稿件说明：
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[1]高宗宝,吴广宁,周利军,刘君,吕玮,赵虎.水份含量对变压器油纸绝缘系统回复电压参数影响规律的研究[J].高压电器,2011,47(04):37-41.

GAO Zong-bao, WU Guang-ning, ZHOU Li-jun, et al. Influence of Moisture Content on Parameters of Return Voltage Measurement in Oil-paper Insulation System of Transformer[J]. High voltageapparatus, 2011, 47(4): 37-41.
[1]高宗宝,吴广宁,周利军,刘君,吕玮,赵虎.水份含量对变压器油纸绝缘系统回复电压参数影响规律的研究[J].高压电器,2011,47(04):37-41. DOI： 10.13296/j.1001-1609.hva.2011.04.010.

GAO Zong-bao, WU Guang-ning, ZHOU Li-jun, et al. Influence of Moisture Content on Parameters of Return Voltage Measurement in Oil-paper Insulation System of Transformer[J]. High voltageapparatus, 2011, 47(4): 37-41. DOI： 10.13296/j.1001-1609.hva.2011.04.010.

摘要

油浸式电力变压器中的油纸绝缘系统受潮会加速固体绝缘材料老化

严重影响其运行寿命

因此评估变压器绝缘纸板中的水份含量对确保变压器安全可靠运行具有重要意义。基于回复电压的极化谱方法是一种无损的绝缘诊断方法

已经被用来评估变压器的绝缘状态。笔者研究了不同充电时间下水份含量变化对回复电压参数的影响规律。结果表明

回复电压最大值和初始斜率随绝缘系统中水份含量的增加呈二次函数规律增加

而中心时间常数随绝缘系统中水份含量的增加呈二次函数规律下降

中心时间常数对水份含量变化的影响最为明显

可通过中心时间常数来诊断变压器油纸绝缘系统中的水份含量和受潮程度。

Abstract

Once the oil-paper insulation system in oil-immersed transformer is affected with damp

the aging of solid insulation materials will be accelerated and the operation life will be seriously influenced.Therefore

the assessment of moisture content in insulating paper board of transformer makes great sense for the safe and reliable operation of transformer.As a non-destructive insulation diagnostic technique

the polarization spectral method which is based on return voltage measurement has been employed to assess the state of insulation of the transformer.In this paper

the effect of moisture content change under different charging time on the parameter of return voltage is studied.The result shows that with the increase of moisture content in insulation system the maximum value of return voltage and initial slope increase in second-order linear form

while the central time constant presents an opposite trend.The central time constants vary obviously with the change of moisture constant

so it is considered as a reliable indicator to evaluate moisture content and moisture level in oil-paper insulation system of transformer.

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Related Institution

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