Diagnosis of EPDM's aging by electrical trees

Nacéra Rouha (1) , Abderrahmane Beroual (2)

1 UB - Université Abderrahmane Mira [Université de Béjaïa] = University Abderrahmane Mira [University of Béjaïa]
2 EE - Ampère, Département Energie Electrique

This paper is aimed at the characteristics of treeing phenomena developing in EPDM (Ethylene Propylene Diene Monomer) in a point - plane electrode arrangement and the resulting damages when subjected to ageing AC voltage. It reports mainly on the measurements of the partial discharge inception voltage (PDIV) and partial discharges (PDs) accompanying the evolution of tree structures, the dissipation factor (tgδ) and capacitor (Cx) of insulation as well as the chemical analyses that are Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) to identify the changes in the morphology and microstructure of damaged polymer. The obtained results evidence the fact that the tree formation is linked to the appearance of partial discharges which are promoted by off-gases forwards to the material microstructure modification.

Mots clés: Aging; Partial discharges; Chemicals; Voltage measurement; Scanning electron microscopy; Electrodes

Domaines: Energie électrique

Nacéra Rouha, Abderrahmane Beroual. Diagnosis of EPDM's aging by electrical trees. IEEE Transactions on Dielectrics and Electrical Insulation, 2015, 22 (5), pp.2852 - 2857. ⟨10.1109/TDEI.2015.004869⟩. ⟨hal-01388282⟩