Inversion of Oil-Immersed Paper Resistivity in Transformer Based on Dielectric Loss Factor

Ruan, Jiangjun; Xie, Yiming; Jin, Shuo; Shi, Yu; Tian, Yuan; Deng, Yongqing

doi:10.1109/access.2019.2907288

Cited by 6 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the operation of the transformer, the DP dropped due to normal or abnormal aging factors. It was impractical to directly simulate the pyrolysis reaction of cellulose chains with over 1000 DP [38]. Mazeau et al…”

Section: Simulation Methods Of Reaxff-md a Construction Of Cellumentioning

confidence: 99%

Microscopic Mechanism of Cellulose Bond Breaking and Bonding Based on Molecular Dynamics Simulation

Qing

Zheng

Zhu³

et al. 2019

IEEE Access

View full text Add to dashboard Cite

The ReaxFF molecular dynamics simulation and Monte Carlo method were adopted to analyze the pyrolysis process of cellulose in insulating papers from the perspective of microscopic atom. Molecular dynamics failed to continuously describe the motion behavior of an atom. According to this principle, the system can only calculate the atomic state on the node and then move the atom by a time step to continue calculating the atom. This paper would put forward the optimal step setting method of cellulose thermal decomposition in insulating paper: setting one step every other 0.1 fs. Specifically, for small molecules with a simple structure, such as H 2 O, the step size was set to 0.4 fs or less, while the step size of macromolecules with complex structures (CH 2 O 2) should be set to 0.2 fs or less. In addition, the relationship between the step size and the temperature to which the system was heated was given as well in this paper. In previous literatures, empirical values were used to set the step size. This study would not only provide a theoretical basis for the study on the bond formation and fracture process of cellulose pyrolysis products, but also offer the data and guidance for related fields in the future, thus rendering an efficient simulation process. INDEX TERMS Molecular dynamics, step size, cellulose, pyrolysis.

show abstract

Section: Simulation Methods Of Reaxff-md a Construction Of Cellumentioning

confidence: 99%