Quantum Mechanism of Insulation Degradation Induced by Charge Relaxation in Silicone Gel Under the Ultrafast Pulsed Electric Field

For the problem of insulation deterioration under ultra-fast pulsed electric field, we study the charge characteristics of organic insulating materials from the quantum point of view. It is found that due to the strong interaction between the electrons and the nucleus in organic molecules, the electrons exist in the trap energy level in the form of local states when there are defects in the material. Based on Marcus’ theory, the local space charge transition is different from the free electrons, and it will be not only related to trap distance, trap depth, temperature, and other factors, but also closely related to the soft properties of polymer materials. Therefore, the relative speed between the space charge relaxation time and the mutation time of ultra-fast pulsed electric field is the premise to reveal the insulation failure caused by trapping and detrapping.