Investigation of the Microscopic Dynamical Behavior and Bridging Mechanism of Cellulose Particles in Insulating Oil

This research employs a high temporal resolution particle imaging velocimetry system to observe the entire bridging process of cellulose particles in insulating oil from a microscopic perspective. The analysis focuses on the particle dynamic behaviors that play a significant role in bridging and provides an in-depth elucidation of the bridging mechanism. By analyzing the motion characteristics of cellulose particles, mechanisms including charging, polarization, charge transfer, and interparticle interactions were discussed. The space charge polarization (SPCP) effect of charged cellulose particles was discovered, leading to the development of a cellulose particle dynamic model that incorporates SPCP. This model provides a rational explanation for the observed dynamic behaviors of cellulose particles and holds the potential to become a fundamental theory in the field of liquid dielectric impurity particle contamination.