Simulation of Migration and Aggregation of Carbon Particles in Converter Transformer Value-Side Bushing Turret Using Fast-DPM Method

A Fast-DPM method applicable to large-scale, long-term particle dynamics simulation was proposed based on the motion characteristics of micrometer-sized particles in highly viscous media. This method significantly improves computational efficiency while ensuring computational accuracy and was employed to simulate the motion and aggregation characteristics of carbon particles within the valve-side bushing turret under rated operating conditions. By considering the internal structure of the valve-side bushing turret, the influence of factors such as electric field, oil flow, and gravity on the motion characteristics of carbon particles was discussed. The simulation captured the aggregation characteristics exhibited by large-scale carbon particles after prolonged motion and assessed the contamination risk of carbon particles in different regions within the valve-side bushing turret. This study provides a fundamental approach for simulating the dynamic processes of impurity particle motion in liquid dielectrics, serving as a crucial foundation for evaluating insulation contamination risk and guiding insulation optimization within the valve-side bushing.