电热作用下矿物绝缘油裂解的反应分子动力学模拟  

Reaction Molecular Dynamics Simulation of Mineral Insulating Oil Decomposition Under Electrothermal Action

作　　者：李开基 严英杰[2] 刘亚东[2] LI Kaiji;YAN Yingjie;LIU Yadong(School of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《上海电力大学学报》2024年第3期285-292,共8页Journal of Shanghai University of Electric Power

摘　　要：针对矿物绝缘油因电、热因素裂解,从而导致绝缘失效问题,提出了一种基于ReaxFF力场的反应分子动力学模拟方法。在传统的运动方程式中加入电磁理论,建立了含有30个分子的矿物绝缘油仿真模型,分析了热场和电场对矿物绝缘油裂解微观过程的影响。首先对特征气体进行识别和统计,然后通过仿真动态图像分析矿物绝缘油的微观反应过程,最终得到了电热联合作用矿物绝缘油的产气规律。通过与柱板电极放电实验产气的结果对比,验证了仿真结果的合理性。实验结果表明,热场是矿物绝缘油裂解的主要影响因素,同时电场对矿物油裂解也起到促进作用。In order to solve the problem of insulation failure caused by the cracking of mineral insulating oil due to electrical and thermal factors,based on the molecular dynamics simulation of the ReaxFF force field,electromagnetic theory is added to the traditional motion equation to establish a simulation model of mineral insulating oil containing 30 molecules and analyze the influence of thermal field and electric field on the microscopic process of mineral oil decomposition.First,the characteristic gases are identified and counted,and then the microscopic reaction process of mineral oil is analyzed through simulated dynamic images,and finally the gas production rules of mineral insulating oil under the combined action of electricity and heat are obtained.The rationality of the simulation results is verified by comparing with the gas production results of the column plate electrode discharge test.The results show that the thermal field is the main influencing factor for the decomposition of mineral insulating oil.At the same time,the electric field also promotes the decomposition of mineral oil.

关 键 词：矿物绝缘油 电场 热场 反应分子动力学模拟 ReaxFF力场 

分 类 号：TM214.1[一般工业技术—材料科学与工程]