Journal
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Volume 11, Issue 1, Pages 113-121Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TDEI.2004.1266324
Keywords
LDPE insulation; insulation interface; space charge dynamics; PEA technique; effect of electrode materials; charge formation; charge decay; potential barrier
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This paper reports on an investigation into the space charge formation and decay at different material interfaces. In particular, the influence of the interface between electrode and polymer or polymer and polymer on the space charge dynamics has been studied. Planar samples were subjected to high dc electric stresses for extended periods of time and space charge measurements taken using the pulsed electroacoustic (PEA) technique. It has been found that the types of interface between electrode and polymer play a significant role in determining the charge distribution in the insulation and that the interface between, polymer and polymer acts as a potential barrier to electrons while allowing positive charge carriers through easily.
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