Abstract
High voltage cables are one of the indispensable equipment in power transmission and distribution. The partial discharge characteristics of high voltage cables can provide guidance for cables status assessment and maintenance. A partial discharge testing is carried out for four typical defects that may occur in high voltage cables. After that, three parameters of the partial discharge are extracted and discussed, the discharge magnitude, the pulse amplitude and the rise time. The dynamic withstand voltage characteristics of partial discharge induced by typical defect types of the high voltage cables are summarized. The results indicate that the dynamic withstand voltage characteristics of partial discharge induced by different defective are quite different, and the variation trends and variation intervals of different characteristic parameters are obviously discriminate. Based on the analysis and comparison of the dynamic withstand voltage characteristics of partial discharge for the high voltage cables, the defect type of the cables can be effectively identified, which has reference significance for the pattern recognition of partial discharge and the evaluation of cables status.
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