Research on the Aging Mechanism of Insulation Paper of Converter Transformer Based on Molecular Dynamics

With the increase in the demand for long-distance and large-capacity transmission, more and more Ultra High Voltage Direct Current (UHVDC) projects are put into construction, and the research on the insulation of the converter transformer of its core equipment has become very important. Based on molecular dynamics, this paper establishes an insulating paper model, and applies force fields such as COMPASS II, ReaxFF6.0 to simulate the actual working environment of the insulating paper, so as to analyze the diffusion of small molecules in the insulating paper; explain the effect of electric field on the main chemical bond length of cellobiose; analyze the content change of main products and describe the formation path of main products. Intends to explore the aging mechanism of insulating paper from a microscopic point of view.