2022 IEEE International Conference on High Voltage Engineering and Application (ICHVE 2022)

In this paper, the dielectric properties of polypropylene (PP) films under different magnetic field are investigated. The insulation degradation mechanism is analyzed. A performance optimization method based on Fe3O4 nano doping is proposed. After the doping modification, the conductivity decreases by 64.7% and the breakdown strength is enhanced to 124% at 12 T. This paper provides a reference for the performance improvements of PP film under the magnetic field.