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Research on Life Prediction of Oil-Paper Insulation Based on Dielectric Response

机译：基于介质反应的油纸绝缘寿命预测研究

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摘要

The power transformer is an important part of the power grid. The aging of oil-paper insulation is affected by many factors such as temperature and moisture. In order to accurately evaluate the service life of transformer and ensure the stable operation in power system, a method for predicting the lifetime of oil-immersed pressboard under different temperatures and moisture content was proposed. This method is mainly realized by the chemical reaction kinetic equations and transformation factor. Firstly, the effect of temperature and moisture content on the frequency dielectric response of oil-paper insulation was studied by frequency domain dielectric spectroscopy method. The results show that the dielectric loss of oil-immersed pressboard increases with the increase of moisture content and temperature. The activation energy of oil-immersed pressboard also increases exponentially with the increase of moisture content. Then, we analyzed the trend of polymerization degree of insulation pressboard in aging process and calculated the insulation life and the remain lifetime by combining the cellulose degradation kinetic models and translation factor. When the moisture content of the oil-immersed at 70°C, the life expectancy of oil-paper insulation is about 19.26 years.
机译：电力变压器是电网的重要组成部分。油纸绝缘的老化受到温度和水分等许多因素的影响。为了准确评估变压器的使用寿命，并确保电力系统中的稳定运行，提出了一种预测不同温度和水分含量下的油浸式压板的寿命的方法。该方法主要由化学反应动力学方程和转化因子实现。首先，采用频域介电光谱法研究了温度和水分含量对油纸绝缘的频介质响应的影响。结果表明，随着水分含量和温度的增加，油浸式压板的介电损耗增加。随着水分含量的增加，油浸式压板的激活能量也呈指数呈指数增长。然后，我们通过组合纤维素降解动力学模型和平移因子来分析了老化过程中绝缘压力表的聚合程度的聚合程度的趋势，并计算了绝缘寿命和剩余的寿命。当浸入70℃的油浸渍时，油纸绝缘的预期寿命约为19.26年。

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  • 来源
    《Electric Power Components and Systems》 |2020年第5期|281-290|共10页
  • 作者

    Ji Liu; Jialu Lv; Mingze Zhang; Haifeng Jia; Weitao Zhuang; Xin Chen;

  • 作者单位

    Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin People's Republic of China State Key Laboratory Breeding Base of Dielectrics Engineering Harbin University of Science and Technology Harbin People's Republic of China;

    Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin People's Republic of China;

    State Key Laboratory Breeding Base of Dielectrics Engineering Harbin University of Science and Technology Harbin People's Republic of China;

    State Key Laboratory Breeding Base of Dielectrics Engineering Harbin University of Science and Technology Harbin People's Republic of China;

    State Key Laboratory Breeding Base of Dielectrics Engineering Harbin University of Science and Technology Harbin People's Republic of China;

    Heilongjiang Electric Power Research Institute Harbin People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    oil-paper insulation; frequency-temperature transformation; aging life prediction; remain lifetime prediction;

    机译：油纸绝缘;频率温度变换;老化生活预测;保持寿命预测;

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