颗粒污染物对变压器油氧化安定性的影响

发布时间：2018-12-12 07:52

【摘要】：氧化安定性是标志变压器油抵抗外界氧化性物质能力的指标,油液中颗粒物的存在极易影响油液的氧化安定性能。根据ISO4406标准,采用均匀设计法,配制了24组含Cu、Fe、SiO_2的不同粒径不同污染度的颗粒污染物油样并对其进行了热氧化实验,测试了热氧化前后油样的酸值,获得了不同组分、不同含量的颗粒物对油液氧化安定性的影响规律;并采用偏最小二乘法建立了油中不同组分、不同粒径、不同含量的颗粒物与油样氧化安定性之间的数学模型。结果表明应用建立的Cu、Fe颗粒与油液氧化安定性之间的数学模型对验证集的决定系数和均方根误差分别为0.939 9、0.442 1×10~(-2);含有SiO_2非金属颗粒油液的热氧化后酸值小于含金属颗粒油液的热氧化后酸值,金属颗粒在粒直径为15μm时对变压器油氧化安定性能的影响最为显著,变化范围为0.066×10~(-3),油液氧化安定性随着铜、铁颗粒含量的增加而降低;油中SiO_2颗粒的存在延缓了油液的老化速度,一定程度上提高了油液的氧化安定性。
[Abstract]:Oxidation stability is an indicator of the ability of transformer oil to resist external oxidizing substances, and the presence of particles in oil can easily affect the oxidation stability of oil. According to ISO4406 standard, 24 groups of oil samples containing Cu,Fe,SiO_2 with different particle size and different contamination degree were prepared by uniform design method and thermal oxidation experiments were carried out. The acid values of oil samples before and after thermal oxidation were tested. The effects of different components and different contents of particles on the oxidation stability of oil were obtained. The partial least square method was used to establish the mathematical model between the oxidation stability of different components, different particle sizes and different contents of particles and oil samples. The results show that the determinant coefficient and root mean square error of the established mathematical model for the oxidation stability of Cu,Fe particles and oil are 0.939 ~ 0. 442 1 脳 10 ~ (-2), respectively. The acid value after thermal oxidation of the oil containing SiO_2 particles is lower than that of the oil containing metal particles. The effect of metal particles on the oxidation stability of transformer oil is most significant when the particle diameter is 15 渭 m. The range of variation is 0.066 脳 10 ~ (-3). The oxidation stability of oil decreases with the increase of copper and iron content. The existence of SiO_2 particles in oil delayed the aging rate of oil and improved the oxidation stability of oil to some extent.
【作者单位】：重庆工商大学废油资源化技术与装备工程研究中心;
【基金】：国家自然科学基金(51375516)~~
【分类号】：TE626.3

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