基于频域介电谱法的绝缘纸聚合度和水分含量预测的新方法

发布时间：2018-02-26 21:29

本文关键词： 绝缘纸频域介电谱法评估参数M 绝缘纸聚合度水分含量　出处：《绝缘材料》2014年06期 　论文类型：期刊论文

【摘要】：频域介电谱法应用于评估油纸绝缘中的水分含量时,其测试结果会受到试样温度、老化状态和绝缘几何参数等因素的影响。为了消除几何参数的影响,试验引入与绝缘几何参数无关的评估因子M,通过试验方法建立了M与绝缘纸聚合度和tanδ(f=1 Hz)的函数关系。定义不同频率下tanδ的标幺值(tanδ)p.u.和(tanδ)p.u.的平均值(tanδ)avg,建立了(tanδ)avg与绝缘纸中水分含量的函数关系。结果表明:参数M随绝缘纸聚合度的减小而增大且呈近似指数关系,与tanδ(f=1 Hz时)呈近似线性关系;(tanδ)avg与绝缘纸中水分含量呈近似线性关系,因此,可以将参数M和(tanδ)avg分别作为绝缘纸聚合度和纸中水分含量预测的新参数。
[Abstract]:When the frequency domain dielectric spectrum method is applied to evaluate the moisture content in oil-paper insulation, the test results will be affected by the temperature of the sample, the aging state and the geometric parameters of the insulation, etc. In order to eliminate the influence of the geometric parameters, By introducing an evaluation factor M independent of the geometric parameters of the insulation, the functional relationship between M and the degree of polymerization of insulator paper and the tan 未 F ~ (1 Hz) is established by means of the test method. The standard value of tan 未 is defined at different frequencies, and the mean value of tan 未 is defined, and the average value of tan 未 is set up, and the values of tan 未 avg and tan 未 are established. The results show that the parameter M increases with the decrease of the degree of polymerization of insulator paper and shows an approximate exponential relationship. There is an approximate linear relationship with tan 未 FG and the moisture content in the paper. Therefore, the parameters M and tan 未 Aavg can be used as the new parameters for predicting the degree of polymerization of insulator paper and the moisture content in the paper, respectively.
【作者单位】：西南交通大学电气工程学院;国网四川省电力公司内江供电公司;
【分类号】：TM215.6

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