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基于分子模拟的电力电容器绝缘油中水分的相互作用与扩散机制

Interaction and Diffusion Mechanism of Moisture in Power Capacitor Insulating Oil Based on Molecular Simulation.

作者信息

Wei Changyou, Pang Zhiyi, Qin Rui, Huang Jiwen, Li Yi

机构信息

Faculty of Intelligent Manufacturing, Nanning University, Nanning 530200, China.

Liuzhou Power Supply Bureau of Guangxi Power Grid Co., Ltd., Liuzhou 545000, China.

出版信息

Materials (Basel). 2024 Oct 24;17(21):5180. doi: 10.3390/ma17215180.

DOI:10.3390/ma17215180
PMID:39517455
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11546660/
Abstract

Characterized by its exceptional electrical, physical, and chemical properties, 1-phenyl-1-xylylethane (PXE) insulating oil finds extensive application in the realm of power capacitor insulation. In this study, molecular simulation is employed to investigate the reactivity of PXE insulating oil molecules and the impact of temperature on water diffusion behavior in PXE insulating oil, as well as its solubility. The findings demonstrate a higher propensity for hydrogen atoms in nucleophilic and electrophilic positions within PXE insulating oil molecules to interact with water molecules. The inclusion of a temperature field enhances the Brownian motion of water molecules and improves their diffusion ability within the oil. Furthermore, the temperature field diminishes the interaction force between water molecules and the oil medium. Under the influence of this temperature field, there is an increase in the free volume fraction of PXE insulating oil, leading to a weakening effect on hydrogen bonds between oxygen and hydrogen atoms within PXE insulating oil. Additionally, with increasing temperature, there is an elevation in moisture solubility within insulating oil, resulting in a transition from a suspended state to a dissolved state.

摘要

1-苯基-1-二甲苯基乙烷（PXE）绝缘油以其优异的电学、物理和化学性能为特征，在电力电容器绝缘领域有着广泛的应用。在本研究中，采用分子模拟来研究PXE绝缘油分子的反应活性以及温度对PXE绝缘油中水扩散行为及其溶解度的影响。研究结果表明，PXE绝缘油分子中亲核和亲电位置的氢原子与水分子相互作用的倾向更高。温度场的存在增强了水分子的布朗运动，并提高了它们在油中的扩散能力。此外，温度场减弱了水分子与油介质之间的相互作用力。在该温度场的影响下，PXE绝缘油的自由体积分数增加，导致对PXE绝缘油中氧和氢原子之间氢键的削弱作用。此外，随着温度升高，绝缘油中的水分溶解度升高，导致从悬浮状态转变为溶解状态。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/1b9b6115a92a/materials-17-05180-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/1b9b6115a92a/materials-17-05180-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/7b4bf1c16e80/materials-17-05180-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/86eabc7e4b26/materials-17-05180-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/62f4e7b5a5c8/materials-17-05180-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/58d0da999ecd/materials-17-05180-g004.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/52d25be536e1/materials-17-05180-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/947a503ea639/materials-17-05180-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/f9c115f780eb/materials-17-05180-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/36f20525ef97/materials-17-05180-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/0dfbdad7b3a3/materials-17-05180-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/15ed1d487be6/materials-17-05180-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a9/11546660/1b9b6115a92a/materials-17-05180-g012.jpg

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