Experimental validation of thermal model of unfilled and nano filled transformer oils

2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC) Pub Date : 2017-11-01 DOI:10.1109/APPEEC.2017.8308986

Joyce Jacob, N. D. Mon, P. Preetha

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引用次数: 1

Abstract

The thermal properties of a transformer insulating oil determines the loading capacity and working life of a transformer. Nanotechnology implementation in liquid dielectrics has resulted in nanofluids with improved thermal and electrical properties. The paper details upon an electro-thermal analogous model to find the thermal resistance and thermal capacitance of unfilled and Aluminum Nitride nanoparticle filled transformer oil at different particle concentration. The simulation of the thermal model for unfilled and filled insulating fluids has been done using Comsol Multiphysics and the results have been validated experimentally. Both the simulation and experimental results show a considerable reduction in the thermal resistance and thermal capacitance of the filled transformer oil. An optimal nanoparticle concentration of 0.20 percentage by weight provides the desired thermal characteristics without compromising on the stability of the nanofluid. The results indicate improved thermal properties and hence longer transformer life for nanocomposite filled transformer oil than the unfilled transformer oil.

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未填充和纳米填充变压器油热模型的实验验证

变压器绝缘油的热性能决定了变压器的负载能力和工作寿命。纳米技术在液体电介质中的应用使得纳米流体具有更好的热学和电学性能。本文建立了电热模拟模型，计算了不同颗粒浓度下未填充和填充氮化铝纳米颗粒的变压器油的热阻和热电容。利用Comsol Multiphysics软件对未填充和填充的绝缘流体的热模型进行了模拟，并对模拟结果进行了实验验证。仿真和实验结果均表明，充注变压器油后，其热阻和热电容均有较大的降低。按重量计0.20%的最佳纳米颗粒浓度可在不影响纳米流体稳定性的情况下提供所需的热特性。结果表明，纳米复合材料填充的变压器油比未填充的变压器油具有更好的热性能，从而延长了变压器寿命。

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2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

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