New methodology for surface potential decay measurements: application to study charge injection dynamics on polypropylene films

Pedro Llovera (1) , Philippe Molinié (1)

1 E3S - Supélec Sciences des Systèmes

Our work shows, through measurements on polypropylene films, the validity of surface potential measurements as a technique for dielectric properties analysis. We propose a representation of the decay and potential return curves that separates different components of dielectric response, by using tdv/dt vs log t plots. Using this transformation, and varying some experimental conditions we have identified different contributions to the potential decay. From our experimental observations we suggest a qualitative interpretation of the initial seconds of potential decay for negative corona charged samples that uses a model controlled by surface trap emission and charge exchanges between corona discharge and the insulator surface.

Domaines: Energie électrique; Matériaux

Pedro Llovera, Philippe Molinié. New methodology for surface potential decay measurements: application to study charge injection dynamics on polypropylene films. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11 (6), ⟨10.1109/TDEI.2004.1387828⟩. ⟨hal-01251363⟩