This paper aims at the experimental study of the influence of nanoparticles (namely Fe 3 O 4 , Al 2 O 3 and SiO 2 ) and nanoparticles' mixtures consisting of conductive (Fe 3 O 4 ) and insulating (Al 2 O 3 or SiO 2 ) nanoparticles at various concentrations on the AC breakdown voltage (AC-BDV) of transformer mineral oil. The breakdown voltages at 1%, 10% and 50% cumulative probabilities are deduced. A statistical analysis of experimental results obtained with nanoparticles' mixtures is also performed using normal and Weibull distribution laws. Experimental findings show that the considered nanoparticles significantly improve the average AC-BDV. The improvement can reach 114%, 76% and 75% with Fe 3 O 4 , Al 2 O 3 and SiO 2 NPs, respectively. With mixtures of nanoparticles, namely (Fe 3 O 4 +Al 2 O 3 ) and (Fe 3 O 4 +SiO 2 ), at investigated concentrations, the average AC-BDV always increases. The best improvements are obtained with (20% Fe 3 O 4 +80% SiO 2 ) and (20% Fe 3 O 4 +80% Al 2 O 3 ), that is to say, 94% and 90%, respectively. These latter are better than with SiO 2 and Al 2 O 3 NPs when used singularly.

中文翻译：

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纳米颗粒混合物对矿物油交流击穿电压的影响


本文旨在实验研究纳米颗粒（即Fe 3 O 4 、Al 2 O 3 和SiO 2 ）以及由导电（Fe 3 O 4 ）和绝缘（Al 2 O 3 或SiO 2 ）组成的纳米颗粒混合物的影响。 ）不同浓度的纳米粒子对变压器矿物油的交流击穿电压（AC-BDV）的影响。推导出1%、10%和50%累积概率下的击穿电压。还使用正态分布定律和威布尔分布定律对纳米粒子混合物获得的实验结果进行统计分析。实验结果表明，所考虑的纳米颗粒显着提高了平均 AC-BDV。使用Fe 3 O 4 、Al 2 O 3 和SiO 2 NPs，改善率分别可达114%、76%和75%。对于纳米粒子的混合物，即(Fe 3 O 4 +Al 2 O 3 )和(Fe 3 O 4 +SiO 2 )，在所研究的浓度下，平均AC-BDV总是增加。使用(20％Fe 3 O 4 +80％SiO 2 )和(20％Fe 3 O 4 +80％Al 2 O 3 )获得最好的改进，即分别为94％和90％。当单独使用时，后者比 SiO 2 和 Al 2 O 3 NP 更好。