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首页> 外文期刊>Science, Measurement & Technology, IET >Using the three-parameter Weibull distribution in assessment of threshold strength of pressboard impregnated by different liquid dielectrics
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Using the three-parameter Weibull distribution in assessment of threshold strength of pressboard impregnated by different liquid dielectrics

机译：使用三参数威布尔分布评估不同液体电介质浸渍的压板的阈值强度

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摘要

This study presents the results of the measurements of electrical strength of pressboard specimens impregnated with three different liquid dielectrics: mineral oil, natural ester and synthetic ester. In the experiment carried out in accordance with IEC 60243 standard, two types of pressboard specimens of thicknesses 0.5 and 1 mm, respectively, were considered. The data obtained during the measurements in the form of breakdown voltages were used for calculation of the electrical strength. Both standard-based approach where median value was taken into account in calculations and statistical approach using three-parameter Weibull distribution function where location parameter V0 was considered were applied. The results obtained on the basis of both approaches showed that both the specimens impregnated with mineral oil and ester liquids gave the satisfactory results within the electrical strength determined, which in all cases was higher than minimum required for the impregnated pressboards. The differences indicating slightly better impregnation properties of mineral oil, when the same impregnation conditions are used, are noticeable especially in the case of location parameter of Weibull distribution function. However, these differences are small and in relation to the requirements for the impregnated pressboards may be treated as negligible.
机译：这项研究提供了浸渍有三种不同液体电介质的矿物板的电强度的测量结果：矿物油，天然酯和合成酯。在按照IEC 60243标准进行的实验中，考虑了两种厚度分别为0.5和1 mm的压板样品。在测量过程中以击穿电压的形式获得的数据用于计算电气强度。在计算中考虑了中值的基于标准的方法和考虑位置参数V0的使用三参数Weibull分布函数的统计方法都得到了应用。在两种方法的基础上获得的结果表明，用矿物油和酯液体浸渍的试样在确定的电气强度范围内均给出了令人满意的结果，在所有情况下均高于浸渍纸板的最低要求。当使用相同的浸渍条件时，表明矿物油的浸渍性能稍好一些的差异是明显的，尤其是在威布尔分布函数的位置参数的情况下。但是，这些差异很小，相对于浸渍压板的要求而言，可以忽略不计。

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