Influence of Aging on Classification of Partial Discharges in Cavities

概要

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In this work the effect of aging on discharge patterns from cavities in polyethylene (PE) is investigated. Two aspects were taken into account-aging due to discharges and the location of the cavity (dieletric or electrode bounded). Discharge patterns were analyzed using a previously developed technique involving statistical parameters. This tool successfully discriminated various aging stages and cavity types. No difference was found between discharge patterns of dieletric- and electrode-bounded cavities in the first minutes from the beginning of measurement. Clear recognition of dieletric- and electrode-bounded cavities in the conditioned and aged stage was achieved. For discharge patterns with asymmetry between the positive and the negative half of the voltage cycle, the ability of statistical parameters to follow changes in the defect location in a test object was proven.
社団法人応用物理学会の論文
1994-10-15