方鲲,韩睿,王文浩,郑一鸣,吴旭翔,姜雄伟
FANG Kun,HAN Rui,WANG Wenhao,ZHENG Yiming,WU Xuxiang,JIANG Xiongwei

• 1:武汉大学电气与自动化学院
• 2:国网浙江省电力有限公司电力科学研究院
• 3:国网浙江省电力有限公司杭州供电公司

摘要(Abstract)：

为探究油纸绝缘热稳定性的微观机理，搭建了与实际油纸绝缘相一致的分子模型，并与实验结果对比验证了分子模型的有效性。以温度为自变量，探究了纤维素分子模型在热场作用下其力学参数与氢键能量的变化情况。研究表明：在相同温度下，对于表征纤维素力学性能的参数——体积模量K、杨氏模量E、剪切模量G与泊松比v，其纤维素晶区模型的数值均高于非晶区模型；氢键能量的分布情况亦相同。纤维素晶区较非晶区有着更为优越的力学性能，并决定了纤维素绝缘纸的绝缘特性。研究结果为探究油纸绝缘热老化的微观机理提供了理论依据与方法。
To explore the microscopic mechanism of thermal stability of oil-paper insulation, a molecular model consistent with the actual oil-paper insulation is established. Through comparison with the experimental results, the effectiveness of the model is verified. With temperature as an independent variable, variation of the mechanical parameters and hydrogen bond energy of the cellulose molecular model under the action of a thermal field is investigated. The results show that parameters characterizing the mechanical properties of cellulose, such as bulk modulus(K), Young's modulus(E), shear modulus(G), and Poisson's ratio(v) of the cellulose crystalline zone model are larger than those of the amorphous zone model at the same temperature, and the distribution of hydrogen bond energy remains the same. Thus, the cellulose crystalline zone is superior to the amorphous zone in mechanical properties and determines the insulation properties of cellulose insulating paper. The results of the study provide a theoretical basis and method for investigating the microscopic mechanism of thermal aging of oil-paper insulation.

关键词(KeyWords)： 分子动力学;油纸绝缘热老化;纤维素;热稳定性
molecular dynamics;thermal aging of oil-paper insulation;cellulose;thermal stability

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目（B311DS210013）

作者(Author): 方鲲,韩睿,王文浩,郑一鸣,吴旭翔,姜雄伟
FANG Kun,HAN Rui,WANG Wenhao,ZHENG Yiming,WU Xuxiang,JIANG Xiongwei

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