Title :
Strong evidence of charge recombination in LDPE under a moderate 50 Hz AC field
Author :
Mary, D. ; Malec, D. ; Fanjeau, O.
Author_Institution :
Lab. de Genie Electr., Univ. Paul Sabatier, Toulouse, France
Abstract :
Low Density Polyethylene 500 μm-thick samples have been submitted to a 15 MV/m rms AC 50 Hz field. No charge accumulation in the samples has been observed with the LIPP-method after a few hours of polarization. This lack of charge gradient has been attributed to the recombination of the majority of charge carriers alternately injected during each half cycle. To verify this assumption, a space charge has been injected in the sample by using a DC electrical stress. Coupled measurements of space charge and electroluminescence have been made. It revealed a decrease of the installed charge at the interfaces which is partially due to the recombination with injected carriers
Keywords :
charge injection; dielectric polarisation; electroluminescence; electron-hole recombination; polyethylene insulation; space charge; 50 Hz; 500 mum; AC field; DC electrical stress; LDPE; LIPP-method; charge accumulation; charge carriers; charge gradient; charge injection; charge recombination; electroluminescence; injected carriers; interfaces; low density polyethylene; polarization; recombination; space charge; Charge carriers; Charge measurement; Current measurement; Electroluminescence; Metallization; Optical polarization; Polyethylene; Pulse amplifiers; Space charge; Stress;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2000 Annual Report Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-6413-9
DOI :
10.1109/CEIDP.2000.885247
