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首页> 外文期刊>Science, Measurement & Technology, IET >Statistical investigation of AC breakdown voltage of nanofluids compared with mineral and natural ester oil
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Statistical investigation of AC breakdown voltage of nanofluids compared with mineral and natural ester oil

机译：与矿物油和天然酯油比较的纳米流体交流击穿电压的统计研究

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摘要

In this study, three different insulating liquids, natural ester, mineral oil which is currently used by the Public Power Corporation of Greece and a nanofluid of surface coated Fe3O4 nanoparticles into a natural ester matrix, were subjected to AC voltage stress and their statistical breakdown voltage was measured and compared. Three different electrode configurations were used during the measurements in order to study the effect of non-uniform fields on the breakdown voltage distribution. Four different statistical distributions were used for the statistical processing of the experimental results. The two of them were the frequently used normal and Weibull distributions; in addition, Gumbel and generalised extreme value (GEV) function distributions were studied. It was shown that, in most cases, the experimental data followed GEV and Weibull functions rather than normal or Gumbel. Therefore, GEV statistics fits indiscriminately better to the experimental results concerning breakdown voltage, for the three different electrodes configuration and the three understudied insulating oils. The experimental results indicated that nanofluid has better performance, in terms of dielectric breakdown voltage, compared with natural ester oil and mineral oil, hence nanofluid is considered as a potential substitute of the conventional dielectric liquids, with enhanced properties and prospects.
机译：在这项研究中，三种不同的绝缘液体，天然酯，希腊公共电力公司目前使用的矿物油和表面涂覆的Fe3O4纳米粒子进入天然酯基体的纳米流体，都经受了交流电压应力及其统计击穿电压被测量和比较。在测量过程中使用了三种不同的电极配置，以研究非均匀电场对击穿电压分布的影响。四种不同的统计分布用于实验结果的统计处理。他们两个是经常使用的正态分布和威布尔分布。此外，还研究了Gumbel和广义极值（GEV）函数分布。结果表明，在大多数情况下，实验数据遵循的是GEV和Weibull函数，而不是正常或Gumbel。因此，对于三种不同的电极配置和三种被研究不足的绝缘油，GEV统计数据可以更好地适应击穿电压的实验结果。实验结果表明，与天然酯油和矿物油相比，纳米流体在介电击穿电压方面具有更好的性能，因此纳米流体被认为是常规介电液体的潜在替代品，具有增强的性能和前景。

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