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Modeling the effect of uniform and nonuniform dispersion of nanofillers on electrical tree propagation in polyethylene dielectric

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Journal of Advanced Dielectrics 2022年第3期12卷 48-57页

作者： Khola Azhar Salman Amin Electrical Engineering Department University of Engineering and TechnologyTaxilaPunjab 47080Pakistan

A phase-field model is developed in this paper based on the similarity between mechanical fracture and dielectric *** treeing is associated with the dielectric breakdown in solid dielectrics by the application of high *** of explicitly tracing the propagation of conductive channel,this model initializes a continuous phase field to characterize the extent of *** far,limited research has been conducted for simulating the effect of nanofiller dispersion on electrical *** study has modeled the effect of uniform and nonuniform dispersion of nanofillers with varying filler concentration on *** electrical treeing tends to decrease the breakdown strength of solid dielectrics therefore,nanofillers are widely used to distract the tree from a straight channel to distribute its energy in multiple *** a straight treeing channel into mul-tiple paths reduces the chances of its propagation from live to dead-end hence,improving the breakdown *** physical and chemical nature of nanofillers has a crucial impact on increasing the resistance to *** this paper,phase-field model is developed and used to simulate electrical treeing in polyethylene for varying concentrations of alumina nanofiller using COM-SOL *** inception time,tree-growth patterns,and corresponding changes in dielectric strength is studied for both *** treeing under different concentrations of alumina nanofillers with uniform and nonuniform dispersion is investigated in polyethylene as a base *** is observed that fillers with uniform dispersion increases the resistance to tree-ing and tree inception *** resistance to treeing is observed by adding 1%nanoalumina uniformly in raw ***,in uniform dispersion the tree deflects into multiple branches earlier than nonuniform dispersion impeding the damage speed as well.

关键词： Phase-field model dielectric breakdown resistance to treeing uniform and nonuniform filler dispersion

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