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首页> 外文期刊>Dielectrics and Electrical Insulation, IEEE Transactions on >Dispersion behavior and breakdown strength of transformer oil filled with TiO2 nanoparticles
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Dispersion behavior and breakdown strength of transformer oil filled with TiO2 nanoparticles

机译：TiO 2 纳米颗粒填充的变压器油的分散行为和击穿强度

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Recently, the study of transformer oil-based nanofluids became of great interest, due to their prospective properties as a dielectric and cooling medium. However, agglomeration of nanoparticles limits the beneficial properties that can be obtained from nanofluids. So, the work presented in this paper aims to get enhanced dispersion behavior of nanoparticles within transformer oil-based nanofluids. Then, breakdown strength with the enhanced dispersion behavior is evaluated. In order to get enhanced dispersion behavior, nanofluids were prepared using nanoparticles with a surfactant. The surfactant plays a role in the stabilization of nanoparticles and maintaining suspension stability. The considered type of nanoparticles is TiO nanoparticles. Two series of nanofluid samples were prepared. Through the first series, the effect of surfactant concentration on dispersion behavior and agglomerate size was studied. The dispersion of nanoparticles was characterized using three different techniques. These techniques are optical microscope analysis, transmission electron microscope (TEM) analysis and zeta potential measurements. Based on these techniques, the suitable concentration of surfactant was identified. The second series of nanofluid samples was prepared with different weight percents of nanoparticles for assessing the breakdown strength. Weibull distribution was used to calculate the breakdown probability for the base oil as well as nanofluid samples. The results showed an enhancement in the breakdown strength by about 27% in comparison to the base oil. Based on the obtained results, mechanisms behind the dispersion behavior and breakdown strength were proposed and discussed.
机译：近来，由于基于变压器油的纳米流体作为电介质和冷却介质的前瞻性，人们对它的研究引起了极大的兴趣。但是，纳米颗粒的团聚限制了可以从纳米流体获得的有益性能。因此，本文提出的工作旨在提高纳米颗粒在变压器油基纳米流体中的分散性能。然后，评估具有增强的分散性能的击穿强度。为了获得增强的分散性能，使用具有表面活性剂的纳米颗粒制备了纳米流体。表面活性剂在稳定纳米颗粒和保持悬浮液稳定性中起作用。认为的纳米颗粒类型是TiO纳米颗粒。制备了两个系列的纳米流体样品。通过第一个系列，研究了表面活性剂浓度对分散行为和附聚物尺寸的影响。使用三种不同的技术表征了纳米颗粒的分散性。这些技术是光学显微镜分析，透射电子显微镜（TEM）分析和zeta电位测量。基于这些技术，确定了合适浓度的表面活性剂。用不同重量百分比的纳米颗粒制备第二系列的纳米流体样品，以评估击穿强度。威布尔分布用于计算基础油以及纳米流体样品的分解概率。结果表明，与基础油相比，击穿强度提高了约27％。根据获得的结果，提出并讨论了分散行为和击穿强度背后的机理。

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